Open Accessibility Menu

Our Leadership

Anderson Medical Center Boulder Community Health is led by a volunteer Board of Directors made up of local residents committed to preserving nonprofit, quality health care in our community. The Board of Directors meets regularly to guide the strategic direction of BCH.

Our Management Council administrative team is responsible for ensuring that our health system’s mission, vision and beliefs are integrated into our day-to-day operations.

Our Medical Staff leadership ensures that our patients receive medical care that is rooted in evidence-based best practices.

Board of Directors

John Greff, Chair

John GreffJohn joined the BCH Board in 2018. He has over 35 years’ experience in finance, working as Chief Financial Officer for Allos Therapeutics, a venture-backed bio-pharmaceutical start-up and at bio-pharmaceutical company Somagen. In 1996, John co-founded Sequel Venture Partners, which currently manages over $410 million in venture capital and has invested in over 70 early stage portfolio companies.

John served six years on the BCH Foundation including one as the Chair of the Board of Trustees. Previously, he served six years including one as Board Chairman of Impact on Education, a non-profit benefiting K-12 public school education in the Boulder Valley School District. He also has served since 2000 as a Board Member of the Colorado State University Institute for Entrepreneurship.

Deborah Lund, M.D., Vice ChairDeborah Lund

Deborah joined the BCH Board in 2018. She’s been an Emergency Physician at Boulder Community Health since 2002 and the ED Physician Assistant Supervisor since 2003. Deborah has extensive experience with various BCH Committees and Leadership. She served as Medical Staff President for three years and was the Credentials Committee Chair for two years. Deborah currently participates in the BCH Board of Directors Planning Committee and the Professional Practice Review Committee. Deborah obtained her medical degree from University of California Irvine, School of Medicine and completed her Emergency Medicine residency at Stanford University, where she was Chief Resident.

Nancy Stevens, TreasurerNancy Stevens​​

Nancy Stevens joined the BCH Board in 2020 having previously served on the BCH Foundation Board for six years. Nancy has had a distinguished career in the financial services industry and most recently co-founded the Stevens Cohen Group, a wealth management practice. Previously, she was Chairman of First Western Trust Bank in Boulder.

In addition to BCH, she has served on the boards of Boulder Community Foundation (Past Chair), Impact on Education (Past Chair), Boulder Chamber of Commerce Esprit Entrepreneur (Past Chair), CU Law School’s Silicon Flatirons Entrepreneurship Initiative, eTown, Blue Sky Bridge and Philanthropiece.

Benita DuranBenita Duran, Secretary​​​

Benita Duran joined the BCH Board in 2014. She has more than 25 years of expertise in community engagement and public affairs, having been appointed an aide to a Denver mayor early in her professional career as well as serving in the Boulder city manager’s office for nine years, directing government affairs for an environmental engineering firm and directing outreach efforts for Denver Public Schools’ bond program. Benita also has extensive non-profit board experience and is past chair of the Denver Mi Casa Resource Center Board of Directors and a trustee and past chair of the Community Foundation Serving Boulder County. She was a founding member of the Boulder Latino Task Force and a former board member of Attention Homes, YWCA, Family Learning Center, Intercambio and the Watershed School, along with serving on BVSD parent councils and bond oversight committees. Benita is currently on the Board of the Boulder Shelter for the Homeless. In 2016, she was appointed to the Colorado Economic Development Commission. She is also a member of the Colorado Women’s Forum and the International Women’s Forum.

Suzy Agetonsuzy ageton

Suzy Ageton joined the BCH Board in 2014. She has had successful careers in social science research and legal practice, as well as creating a consulting practice in strategic planning and communications. Her community involvement is extensive, including nine years as a Boulder City Council member. She represented the City at several international events and locally as the Council representative on the Boulder Housing Partners Board and the US36 Mayors and Commissioners Coalition. Her community volunteer work also includes service on the Boulder Human Relations Commission as a court-appointed special advocate for dependent and neglected children and as a Board member for Attention Homes and Women’s Health. At the state level, she served five years as a gubernatorial appointment to the Colorado Juvenile Parole Board.

Philip DistefanoPhilip Distefano

Philip DiStefano is the Chancellor at the University of Colorado Boulder. Prior to his appointment on May 5, 2009, Mr. DiStefano was the top academic officer at CU Boulder for eight years as the Provost and Executive Vice Chancellor for Academic Affairs.He served as interim chancellor twice during pivotal times in the university's history. Mr. DiStefano co-chaired the steering committee for CU Boulder's visionary strategic plan, Flagship 2030, conceived with campus, community and statewide input, to guide CU Boulder for decades to come. Today, he is shepherding its implementation as Flagship 2030 moves from vision to reality. Mr. DiStefano has served CU Boulder for 42 years. He joined the University of Colorado in 1974 as an Assistant Professor of Curriculum and Instruction at the School of Education. His academic career flourished as he assumed a series of academic and administrative positions, including Professor, Associate Dean, Dean and Vice Chancellor. He was appointed Provost and Executive Vice Chancellor for Academic Affairs in 2001. As Chancellor he works closely with students, faculty, staff, alumni, donors, governing officials, and business and community leaders in extending CU's legacy as a preeminent national comprehensive research university. A first-generation college graduate, Mr. DiStefano earned a Bachelor of Science degree from Ohio State University and a Master of Arts degree in English Education from West Virginia University. He holds a Doctorate in Humanities Education from Ohio State University, where he served as a teaching and research associate. Mr. DiStefano and his wife, Yvonne, have been married for 46 years. They are the parents of three grown daughters and the proud grandparents of two girls.

John Fleagle, M.D.Fleagle

John Fleagle is a board-certified medical oncologist who started his professional career in Boulder in 1983 following his medical training. He earned his medical degree with honors at the University of Illinois in Chicago. He then pursued an internal medicine residency at Michael Reese Hospital in Chicago followed by a medical oncology fellowship completed in 1983 at the University of Colorado.

Over the years at BCH, he served in multiple volunteer roles including, the foundation, the department of medicine, the executive committee, and the planning committee. In 2019 he received the Lifetime Service Award from the medical staff.

During his leadership at Rocky Mountain Cancer Centers in Boulder County expanded to 10 medical oncologists and 3 radiation oncologists serving patients throughout the region.

Dr. Fleagle was elected as the managing partner of Rocky Mountain Cancer Centers, a group of 55 oncologists throughout Colorado, from 2010 until his retirement 2019. He served, as well on many national committees at US Oncology. Among his many professional interests are improving the delivery of healthcare and improving its value to patients.

George KarakehianGeorge Karakehian

George Karakehian was raised in the Boston area in a close Armenian family. He attended college at Colorado State University. In 1969, he met Kristin at CSU and they were married in 1972. They moved to Kristin’s hometown of Boulder. They have two grown daughters who live with their families in the Boulder area. Mr. Karakehian's first career was in the life insurance business. His first office in 1970, was located at 1245 Pearl street. He had a rewarding and successful insurance business for fifteen years. He decided to make a major change in direction in 1985 when he went into the antique map, print and book business. George opened his shop, Art Source International, in 1989, at his current location, 1237 Pearl Street. The business has been a unique part of Boulder’s downtown for 27 years. George has been active in the downtown for many years, and is often referred to as ‘ the Mayor of Pearl street’. He has also been involved with numerous charitable organizations, and his favorite is co-founding, with Bob Charles, the Imagine! Foundation. Through the years, he has served on various city boards and committees, until he finally decided to run for city council. He served as a city council member for six years, from 2009-2015. He was elected mayor pro-tem of the city council in 2014. Since his retirement from council George has been travelling with Kristin and spending more time working at his business. He continues his interest in civic affairs.

Valerie E. Lipetz, M.D.Valerie E. Lipetz, M.D.

Valerie E. Lipetz, M.D., F.A.C.P is an Internal Medicine physician employed by Boulder Community Health. She received her medical degree with honors from the University of Colorado in 1988. She earned her bachelor’s degree in psychology and general studies from CU, where she graduated magna cum laude, was the Outstanding Graduate in arts and sciences in 1977 and also earned her master’s degree in biology from CU.

Dr. Lipetz is certified by the American Board of Internal Medicine and has been practicing locally since 1991. She is a fellow of the American College of Physicians and enjoys practicing the full spectrum of outpatient general internal medicine. Except for four years in Denver for medical school and a three-year residency in Portland, she has called Boulder home since 1958.

Dr. Lipetz has served as president of the Medical Staff of Boulder Community Health and served as the Chief Medical Officer for the BCH’s clinics for eight years before returning to full-time medical practice. She continues to be extremely active in Medical Staff affairs through serving on committees.

An active community volunteer, she served on the Mental Health Partners board and is the chair of the Boulder County Health Improvement Collaborative. She has been a facilitator for the BCH Listens project and continues to teach clinical skills in her office practice to medical, physician assistant, and nurse practitioner students.

In her spare time, she enjoys traveling, spending time with her children, horseback riding, reading, hiking, and cooking.

Joel Montbriand, M.D.Joel Montbriand, M.D.

Dr. Montbriand is a board-certified, fellowship-trained gastroenterologist who founded Gastroenterology of the Rockies. He retired as a practicing physician effective April 30, 2019.

His medical designations and awards include:

  • Fellow of the American College of Physicians (1994)
  • Fellow of the American College of Gastroenterology (2006).
  • Ernst & Young Entrepreneur of the Year® in the Rocky Mountain Region-Life Sciences category (2006)
  • Boulder County Business Report Health Care Heroes Distinguished Service Award (2010)
  • Boulder County Business Hall of Fame Inductee (2016)

Dr. Montbriand has been at the forefront of growth in gastroenterology care in Colorado since 1988. His one-physician Boulder practice expanded to a large gastroenterology practice serving Boulder County and the metro Denver area. Applying business and technology best practices to his clinical expertise improved scalability, patient access and quality of care while lowering costs at multiple state-of-the-art endoscopy centers and local indigent care clinics. He was a volunteer faculty member at the UC Health and has served on other community health organizations.

Mardi MooreMardi Moore

Mardi Moore is Out Boulder County’s Executive Director. Prior to joining OBC in 2013, Mardi was the Deputy Director of Development at the New York City LGBT Center and worked as the Associate Director of Individual Giving for the National Gay and Lesbian Task Force. She spent the previous 20 years in Seattle where she owned and operated a fundraising consulting firm serving progressive non-profits in the Pacific Northwest. Mardi has been active in LGBTQ politics at both the local and national level for 30 years. She graduated from the University of Denver with a degree in Political Science. As executive director, she is responsible for the financial management and fundraising for OBC as well as staff development and supervision, program evaluation, board development and planning.

Robert Vissers, M.D.Robert Vissers, M.D.

Robert Vissers joined the BCH Board when he was appointed President and CEO in 2014.

Prior to joining BCH, he held several leadership roles at Legacy Health, a nonprofit health system based in Portland, Oregon, where he was also President and CEO of Northwest Acute Care Specialists, one of the largest independent physician groups in the Pacific Northwest.

Dr. Vissers is a lifelong learner and educator who excels at creating efficiency and innovation to drive positive outcomes for his community. He completed his undergraduate studies and medical degree at the University of Western Ontario, followed by a residency in Emergency Medicine at the University of British Columbia. He earned his MBA from Oregon Health & Science University/Portland State University.

Dr. Vissers is well published and has guest lectured internationally. He also has been on the faculty at Harvard University, University of North Carolina, and Oregon Health Sciences University, and currently is a faculty member for the University of Colorado Health Care Executive MBA Program. He has contributed to many local and national organizations and currently serves on the Boards of the Colorado Hospital Association, Boulder County Business Hall of Fame and Bridge House (a local organization that provides resources to lift people out of homelessness).

Rhonda WallenRhonda Wallen

Rhonda Wallen joined the BCH Board in 2015. She has more than 20 years experience in health care and life sciences, working in various senior management capacities to help improve patient health and care and bring innovation and efficiency to the practice of medicine. She is the co-founder of two biotech companies and currently consults with early stage start ups in life sciences. Rhonda was also a trustee and a former board chair for the Community Foundation Serving Boulder County for eight years.

Christopher M. Hazlitt

Chris Hazlitt is Senior Counsel at the global law firm of Bryan Cave Leighton Paisner LLP. He served as Partner in Charge of its Boulder office and has practiced corporate law in Boulder over 30 years. He provides guidance to companies, boards and investors in connection with structuring and negotiating transactions, risk management, governance and dispute resolution. Chris also helps executives with employment, investment, severance, and non-compete matters.

He regularly counsels enterprises ranging from emerging and start-up ventures to middle market enterprises in various corporate transactions including mergers and acquisitions, recapitalizations, and dispositions of businesses, operating units, and assets.

Chris frequently advises clients on capital formation strategy, private placements of debt and equity securities, strategic partnerships and joint ventures. He leverages the experience of fellow BCLP attorneys to represent companies in other key areas affecting business operations.

His broad-based business practice spans a variety of industries, including software and technology, manufacturing, business services, and consumer products and services. He has successfully handled dozens of private and public merger and acquisition deals and securities financings for public and privately held businesses.

Diana Verrilli

Diana Verrilli joined the BCH Board in 2022. With more than 30 years of experience in research and innovation surrounding physician reimbursement, disease management, strategic planning, and other related topics, Diana is known for launching cutting-edge healthcare support programs and payment models that advance technology and improve patient outcomes. She has progressed through multiple positions and divisions at McKesson and today, is SVP, Corporate Strategy and Business Development.

Prior to McKesson, Diana held roles at Harvard, the Urban Institute, Radiology Management Services, and MedSolutions, Inc. In addition, she holds a master’s degree in health policy and management from Harvard and has had recent involvement with American University, Greenhouse Scholars, Women Business Leaders of the US Health Care Industry Foundation, and The US Oncology Network. In addition to her passion for people and commitment to excellence, she brings a strong leadership presence, philanthropic mindset, and reputation for making a measurable impact.

Diana lives in Boulder with her husband, David. They have two children in college.

Management Council

Robert Vissers, President and Chief Executive OfficerRobert Vissers

Dr. Rob Vissers is a health care leader grounded in 25 years of front-line practice in emergency medicine. He joined Boulder Community Health (BCH) in 2014 as Chief Operating Officer before becoming President and Chief Executive Officer in 2015. Prior to joining BCH, he held several leadership roles at Legacy Health, a nonprofit health system based in Portland, Oregon, where he was also President and CEO of Northwest Acute Care Specialists, one of the largest independent physician groups in the Pacific Northwest.

Dr. Vissers is a lifelong learner and educator who excels at creating efficiency and innovation to drive positive outcomes for his community. He completed his undergraduate studies and medical degree at the University of Western Ontario, followed by a residency in Emergency Medicine at the University of British Columbia. He earned his MBA from Oregon Health & Science University/Portland State University.

Dr. Vissers is well published and has guest lectured internationally. He also has been on the faculty at Harvard University, University of North Carolina, and Oregon Health Sciences University, and currently is a faculty member for the University of Colorado Health Care Executive MBA Program. He has contributed to many local and national organizations and currently serves on the Boards of the Colorado Hospital Association, Boulder County Business Hall of Fame and Bridge House (a local organization that provides resources to lift people out of homelessness).

Rob is a father of four who enjoys outdoor adventures and travel with his family.

Jackie Attlesey-Pries, Vice President of Operations, Chief Nursing OfficerJackie Attlesey-Pries

Jackie joined BCH in 2011. Jackie has a passion for patient safety and quality improvement and has had this focus for most of her career. She is a graduate of the American Hospital Association’s Patient Safety Leadership Fellowship and has been active in patient safety committees in Minnesota and nursing associations. She is a member of the National Patient Safety Foundation and the American Organization of Nurse Executives.

Prior to joining BCH, Jackie worked for 25 years at the Mayo Clinic in various nursing leadership positions. She graduated from Gustavus Adolphus College in St. Peter, MN, with a bachelor of arts degree in nursing and from Winona State University in Winona, MN, with a master of science in nursing.

Jackie lives in the Boulder area with her husband, Michael, and her sons, Josh and Sam.

Grant Besser, Vice President of Community Health & Engagement and President, BCH FoundationGrant Besser

Grant became the Vice President of Public Affairs in 2018 and has served as the President of the BCH Foundation since October 2016.

He previously served as Chief Marketing Officer for Teach for America, and held senior management positions at Warner Bros. and Yahoo!.

As BCH Foundation President, Grant is responsible for managing the Foundation grants program, donor relations and spearheading all fundraising efforts, including an $8-million capital campaign to expand mental health services in our community.

He lives in Boulder with his wife and three sons.

Michael Jefferies, Vice President and Chief Information OfficerMichael Jefferies

Michael joined BCH in 2016. He is responsible for implementing technology solutions that advance provider capabilities and operational efficiency at BCH. He is especially passionate about improving the patient experience and giving providers tools to improve the quality of patient care.

Prior to joining BCH, Michael was Vice President of Information Systems at Longmont United Hospital and previously worked at ACS/Xerox and McKesson providing IT solutions to hospitals across the country.

Michael holds an MBA in Healthcare Administration from the University of Colorado, a bachelor’s degree in Business Administration from the University of Colorado, the designation of Certified Healthcare CIO from CHIME and certifications as a PMP and CPHIMS.

Michael lives in Louisville and enjoys rock climbing, volunteering in mental healthcare, seeing live music, rebuilding classic motorcycles, and enjoying life in Colorado with his wife, Asna and two daughters.

Ben Keidan, MD, Vice President and Chief Medical OfficerBen Keidan

Dr. Benjamin Keidan started his role as Boulder Community Health's Chief Medical Officer at in 2018. He enjoys the opportunity to lead BCH with an emphasis on quality improvement, collaborative care, patient safety and improving the patient/care team experience.

Dr. Keidan is an internal medicine physician who has practiced medicine at BCH for over 15 years as both a primary care and hospital medicine physician. Prior to 2018, he was the Medical Director for Quality and Population Health for the BCH employed physician group where he focused on strategies for providing high quality, affordable health care with an emphasis on improved communication and collaboration between health care providers and patients.

Originally from suburban Detroit, he studied history at the University of Michigan and earned his medical degree from Wayne State University. He completed his residency and served as Chief Medical Resident at George Washington University. He went on to practice internal medicine and hospital medicine at Beth Israel Deaconess Medical Center and joined the teaching faculty of Harvard Medical School. He completed his MBA in health care administration at University of Colorado Denver in 2018.

Dr. Keidan is married and has two teenage daughters. He enjoys trail running, swimming and skiing, as well as live music and cooking.

Sarah Meshak, Vice President and General CounselSarah Meshak

Sarah joined BCH in 2009. She has practiced health care law for more than 20 years, representing both hospitals and physicians in a wide variety of matters. Prior to joining BCH, Sarah was a member of the law firm Caplan and Earnest, LLC, which has represented BCH for more than 25 years.

Originally from Wisconsin, Sarah has lived in Colorado since age 11. She graduated from the University of Colorado in 1985 with a bachelor’s degree in political science and women’s studies. With career options in those areas looking bleak, Sarah went to law school at the University of Colorado and graduated in 1988.

Sarah has served on a number of community boards over the years, including the People’s Clinic, the Community Mediation Project and Care Connect. She has also been active in state legal and health care associations, serving as chair of the Colorado Bar Association’s Health Care Council and advisor to the Colorado Managed Care Contractors. Sarah has been a frequent speaker on health care issues statewide and is a member of the Colorado Bar Association, the American Health Lawyers Association, and the Health Care Compliance Association.

Sarah lives in Niwot with her husband Paul, son Matthew, dog Krissy, and various other pets. They love most outdoor activities, particularly camping, hiking, biking and rafting.

Bill Munson, Vice President and Chief Financial OfficerBill Munson

Bill joined BCH in 2008 and has more than 30 years’ experience in hospital financial management. Prior to BCH, Bill served as Chief Financial Officer at North Colorado Medical Center (Greeley, Colo.) and held hospital financial management positions with Humana in Kansas, California, Alaska and Utah. Bill also served as an adjunct professor for the Master’s Program in Healthcare Administration at the University of Kansas.

Bill received a Bachelor of Science degree from the University of Colorado Boulder in 1987 and a Master of Business Administration degree in 2007 from Colorado Christian University. He is a member of Healthcare Financial Management Association.

Bill serves on the board of directors for several organizations that provide needed community services in the areas of outpatient surgery, sports medicine, and hospital laundry. He is currently appointed by Colorado Senate President Garcia’s office as the hospital representative for the Medicaid Provider Rate Review Advisory Committee. Bill is Treasurer for the Boulder Valley Care Network, a clinically integrated network of over 350 providers. He also serves in leadership roles on the Finance and Audit Committees for Captis, which is a member-driven supply network for 80+ hospitals and healthcare systems.

Bill grew up in Colorado Springs. His family includes wife Amy, and two daughters, Katie and Lauren. His interests include horseback riding, hunting and fishing, Jeeping, and enjoying the outdoors. Bill is also a member of the Pikes Peak Range Riders in Colorado Springs. Bill enjoys playing guitar and learning the banjo.

Larry Novissimo, Vice President of Ambulatory Services

Larry Novissimo is the Vice President of Ambulatory Services overseeing all outpatient services at Boulder Community Health. He has a BA in Biology from Bucknell University and a MBA/MHA in Healthcare & Business Administration from the University of Colorado. Larry has a passion for continuous improvement, patient experience, and working to build high functioning teams.

Larry first joined BCH as a Supervisor in Admissions in Financial Counseling from 2000-2007, he went on to climb the ranks building his skill set in leadership roles at Children’s Hospital, The University of Colorado School of Medicine, and Centura Health before returning to BCH in 2018.

Larry lives in Lafayette with his wife Kasie (a nurse at Children’s Hospital Colorado) and three children, Dylan, Luke, and Nora, and enjoys coaching his kids sports teams, playing drums, and camping with his family.

Tonushree J. Tyagi, Vice President & Optum Partnership Executive

Tonushree (also known as “TJ”) is the Vice President overseeing Boulder Community Heath’s strategic partnership with Optum, which includes managed services spanning revenue cycle, inpatient and ambulatory care management, analytics and project management. She serves in a dual role on Boulder Community Health’s Management Council as well as on the OptumInsight Provider market executive team.

She has spent 20 years in health care leadership roles spanning research, marketing, new product development, and client services, largely with the Advisory Board. When the Advisory Board was acquired by Optum in 2017, Tonushree took a role overseeing strategic partnerships with key health system clients and developing new and innovative provider collaborations, which led to the formation of the Boulder Community Health partnership.

Tonushree was born in India and raised in Boston, and earned her undergraduate degree in Economics from Harvard. She now lives in Louisville with her husband Kush, a satellite instrument engineer, and two boys, Ruhaan and Ishaan.

Medical Staff Leadership

Alan Zacharias, M.D., PresidentAlan Zacharias

Dr. Zacharias is board certified in neurology with added specializations in clinical neurophysiology and electrodiagnostic medicine. He has been with Associated Neurologists since 2003.

He earned a B.S. in Molecular Biology from Vanderbilt University in 1987. He received his medical degree from the University of Mississippi in 1991 and completed his neurology residency at the University of Virginia in 1995. He completed a fellowship in Electromyography and Neuromuscular disease at Emory University in 2000.

Susan S Hagen, M.D., Past-PresidentTim Meyers

Dr. Susan Skaff Hagen received her medical degree from the University of South Carolina in 2006. She received her undergraduate degree in Spanish from Davidson College in Davidson, North Carolina. Additionally she holds a Master of Science in Public Health from the University of South Carolina and a Master in Medical Education from the University of Iowa. She completed her residency in General Surgery at the University of Iowa.

She has a special interest in oncologic procedures, colorectal, breast and endocrine surgery. She obtained a certification in the Advanced Trauma Operative Management Course and she is an Advanced Trauma Life Support instructor. She is a member of the American College of Surgeons, Colorado Medical Society and the Boulder County Medical Society.

Dr. Hagen has regularly reviewed surgical text books for Doody Enterprises. She has received several national awards including the American Medical Association Leadership Award, Gold Foundation Humanism and Excellence in Teaching Award and the American College of Surgeons Excellence in Teaching Award.

Elizabeth Cruse, M.D., Ambulatory Medicine Department ChairElizabeth Cruse

Dr. Cruse is a board-certified internist who focuses on the treatment and prevention of adult illnesses and injuries. Fluent in Spanish, Dr. Cruse also has a unique interest in women’s health. Dr. Cruse received her medical degree from Baylor College and completed her residency at the University of Rochester in New York. Her undergraduate degree is from Brown University. Before moving to Boulder, Dr. Cruse practiced internal medicine at Memorial City Hospital in Houston.

A member of the American College of Physicians, Dr. Cruse also served as an assistant professor for the University of Texas Health Science Center, where she was honored with the Dean’s Award for teaching.

Christopher Trojanovich, MD, MPH, MMS, Credentials Committee ChairAlan Zacharias

Dr. Trojanovich is board certified in internal medicine. He has been a member of our medical staff since 2011.

He earned a B.A. in Biology from the University of Colorado in 1996. He received his medical degree from the University of Colorado in 2004 and completed his internal medicine residency at Jewish Hospital in Cincinnati, OH in 2007. He completed a fellowship Complementary and Alternative Medicine at Harvard Medical School in 2011.

Mark Sitarik, M.D., Cancer Committee ChairMark Sitarik

Dr. Mark Sitarik is board certified in internal medicine and medical oncology. He received his medical degree from Hahnemann Medical College and Hospital in Philadelphia, PA and completed his residency in internal medicine at the University Hospitals of Cleveland in Cleveland, OH. He completed his fellowship in medical oncology at the University of Colorado Health Sciences Center in Denver, CO.

Denise Kawecki, F.N.P., Advanced Practice Professionals Committee ChairDenise Kawecki

Denise is a Certified Nurse Practitioner who received her Masters of Science in Nursing and her Bachelor of Science in Nursing from the University of Northern Colorado in Greeley. She is licensed and certified as a Nurse Practitioner through the American Nurses Credentialing Center and State of Colorado Advanced Practice Registry.

Timothy Meyers, M.D., Emergency Medicine Department ChairJonathan Sprague

Dr. Meyers was born and raised in the Maryland countryside. He earned a Bachelor’s Degree in Electrical Engineering from the University of Arizona and a Master’s Degree in Electrical Engineering from the University of Michigan. Prior to starting medical school, he was a research scientist in the government defense sector. Dr. Meyers received his medical degree from the University of Colorado and completed his residency in Emergency Medicine at Stanford University Hospital. He joined the medical staff at BCH upon completing his residency in 2003.

Jonathan Sprague, M.D., Hospital Medicine Department ChairJonathan Sprague

A specialist in internal medicine, Dr. Sprague joined the hospital medicine department in July 2013.

Dr. Sprague grew up in Dallas and graduated with a Physics degree from the University of Texas. He earned his medical degree and completed his internal medicine residency at the University of Colorado.

Prior to pursuing his medical degree, Dr. Sprague worked at several technology companies.

Christopher Nusser, M.D., Imaging Services Department ChairChristopher Nusser

Dr. Nusser is board-certified in diagnostic radiology with expertise in musculoskeletal radiology who joined Boulder Radiologists, Inc. and Boulder Community Hospital in 2004. He first came to Colorado for his undergraduate work at the U.S. Air Force Academy from Garden City, KS. He received his B.S. in chemistry and biology in 1987 and then went on an AF scholarship to the University of Kansas Medical School. After receiving his medical degree, he did his diagnostic radiology residency at the University of Oklahoma Health Science Center.

After residency, Dr. Nusser spent nine years active duty in the Air Force fulfilling his incurred educational commitment achieving the rank of Lt. Col. This included three years at the USAF main teaching hospital and residency program as teaching staff in musculoskeletal radiology for two years and one year in thoracic radiology and mammography. He then spent six years at the USAF Academy hospital as chief of musculoskeletal radiology and cross-sectional imaging from 1998-2004. He gained additional experience in musculoskeletal radiology with an emphasis in sports injuries. In addition, he has experience and skill in a wide range of diagnostic radiology, including image-guided biopsies.

Dr. Nusser is a member of American College of Radiology, Society of Skeletal Radiology, Radiology Society of North America, Roentgen Ray Society, Boulder County Medical Society, and Colorado Medical Society.

Charlie Jones, M.D., Surgical & Trauma Services Committee ChairCharlie Jones

Dr. Jones is a board-certified general surgeon with extensive experience in vascular, thoracic (chest), and general procedures. He has special expertise in laparoscopic surgical procedures. He has been treating patients for more than 25 years.

He received his bachelor’s degree (with honors) from Texas A&M University and his medical degree from the University of Colorado Health Sciences Center in Denver. His internship and residency were completed at the University of Colorado Hospital in 1980.

Dr. Jones is a member of the American College of Surgeons, Boulder County Medical Society and Colorado Medical Society.

Kyle J Marthaller, M.D., Professional Practice Review Committee ChairMolly Ware

Dr. Marthaller is a general surgeon with the latest training on advanced surgical techniques. He has special expertise in trauma as well as minimally invasive procedures including advanced laparoscopy.

He received his bachelor’s degree (with highest honors) from Minnesota State University Moorhead and his medical degree from the University of North Dakota’s School of Medicine, where he was awarded General Surgery Medical Student of the Year in 2011. He completed his five-year residency at St. Joseph Hospital in Denver, where he gained valuable expertise in a nationally recognized Level 1 Trauma Center and also served as Administrative Chief Resident.

Dr. Marthaller is a member of the American College of Surgeons. He is dedicated to providing the best possible patient care, building lasting patient relationships, and contributing to the overall welfare of our community. He enjoys traveling, fishing, hiking, camping and just about anything outdoors.

Douglas Morgan, M.D., Pharmacy and Therapeutics Committee ChairDouglas Morgan

A board-certified Internal Medicine specialist, Dr. Morgan received his medical degree from Case Western Reserve University in Cleveland. He completed his internship and residency at George Washington University Medical Center in Washington, D.C.

He also has an MS in Physiology from the Medical University of South Carolina and a BA in Natural Sciences from Johns Hopkins University in Baltimore. He has been a practicing physician since 1991. As an internist, Dr. Morgan has expertise in the diagnosis and non-surgical treatment of adult disorders, including treatment of severe chronic illnesses.

Roger Nichols, M.D., Practitioner Health and Wellbeing Committee ChairRoger Nichols​​

Dr. Nichols received his undergraduate degree from the University of Iowa in 1985. He graduated from University of Iowa College of Medicine in 1980. He then performed his internship at the University of Nebraska Medical Center from 1989-1994. He was chief resident in 1994 at University of Nebraska Medical Center. He then completed a fellowship in MRI at Johns Hopkins Hospital in 1995.

In 1997, after two years in private practice in Little Rock, Arkansas, Dr. Nichols joined as an associate with Boulder Radiologists, Inc.

Dr. Nichols is board certified in diagnostic radiology and is a member of the American Medical Association, American College of Radiology, Radiological Society of North America, the Colorado Radiological Society, the American Roentgen Society, and the Boulder Medical Society. He has served on many hospital committees, and is currently chairman of the Credentials Committee at Boulder Community Hospital.

Dr. Nichols’ areas of expertise include imagery of the injured athlete, diagnosis and treatment of cardiovascular disease, and oncology care. He enjoys providing state-of-the-art care to his patients in a safe and comfortable environment.