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Program faculty

Click on any of the faculty below to see a description.
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Janell R. Wozniak, M.D., Program Director

Originally from central Illinois, Dr. Wozniak is a graduate of Loyola University Medical School in Chicago. She completed her residency at the Fort Collins Family Medicine Residency Program in 2000. She then spent five years practicing full-spectrum family medicine on a remote Hopi Indian Reservation in northeastern Arizona before returning to join the faculty in 2005. She recently became the Program Director of the residency program and is thoroughly enjoying working so closely with the residents.  Her other professional interests include rural medicine and women's health.

More details about Janell R. Wozniak, M.D.


Kristen L. Benè, Ph.D., Educational Associate Director

Kristen joined our program in 2002 to evaluate a federal residency training grant and now serves as the Educational Associate Director. She works with faculty to design resident educational activities, supports scholarly activity and curriculum development, coordinates residency training grants, and oversees the education team. Kristen received her master's degree in educational psychology from The Pennsylvania State University and her Ph.D. in educational leadership from Colorado State University.


David R. Marchant, M.D., Clinic Medical Director

Dr. David Marchant graduated from Georgetown University School of Medicine. He then went to Anchorage, Alaska, for residency training. After residency, he worked in Juneau, Alaska, at SEARHC, a native Alaskan clinic. He subsequently relocated to Fort Collins in 2001, when he joined Salud Family Health Centers. He served as a member of the residency program's Clinical Faculty at that time. In May 2004, Dr. Marchant joined the program as a faculty physician.

More details about David R. Marchant, M.D.


Carol Pfaffly, Ph.D., Associate Director, Behavioral Health Services

Dr. Pfaffly received her doctorate in marriage and family therapy from Virginia Polytechnic Institute and State University. She is responsible for developing and implementing the behavioral medicine curriculum for first, second and third-year residents. Additionally, she trains counseling interns to work in medical settings and provides counseling services to patients of the medical clinic. Dr. Pfaffly has been with the residency program since 1991.


Mark A. Schifferns, CPA, Administrative Associate Director

Mark Schifferns is a graduate of the University of Colorado where his main fields of study were accounting and human resources management. He earned his Certified Public Accountant license in 1976. Mark has been involved in medical practice management and a member of the MGMA for the past 12 years. He coordinates and teaches the practice management portion of the curriculum, in addition to supervising all non-physician staff. Among his other duties, he is the finance and budget manager for the residency program. Mark's special interests include white water rafting, vintage-car racing and music.


Kelby Bethards, M.D., Faculty Physician

Dr. Kelby Bethards, raised in Iowa, received his bachelor's degree in electrical engineering at Iowa State University. He started his engineering career at IBM and then went to work for Lockheed Martin flying GPS satellites. Dr. Bethards then returned to Iowa State to attend medical school; graduating in 2000. He completed his residency at the Fort Collins Family Medicine Residency Program in 2003. He worked in rural medicine in Holyoke, Colorado and then became an ER physician in Granby, Colorado. In 2012 Dr. Bethards came to University of Colorado Health to work in the urgent care system. Dr. Bethards is the director and a racer for the Fort Collins Cycling Team (Northern Colorado's prominent cycling team for road, mountain and cyclocross). He enjoys skate skiing, alpine skiing, golf, fly fishing and just about anything outdoors. He is also the co-owner of a solar company called Endurance Solar..


Roger Bermingham, M.D., Faculty Physician, Geriatrics

Dr. Roger Bermingham did his undergraduate work at Dartmouth College, Medical School at UCLA, and his residency in family medicine at the University of Iowa. After spending seven years practicing in rural Colorado, Dr. Bermingham joined the faculty of the Residency in 1987 and served as program director from 1996 until the beginning of 2001. Dr. Bermingham is certified in geriatrics and since 2001 has had a private practice of geriatrics and nursing home medicine separate from the Residency. He recently increased his time with the Residency to coordinate the curriculum in geriatrics, ethics, and to assist with the curriculum in humanities.

More details about Roger Bermingham, M.D.


Bernard Birnbaum, M.D., Faculty Physician

Dr. Bernard "Bernie" Birnbaum, originally from Chapel Hill, N.C., graduated from George Washington University School of Medicine and completed a family medicine residency at Thomas Jefferson University in Philadelphia, Penn. He then worked for four years in Chinle, Ariz., with the Indian Health Service in a remote area of the Navajo reservation. In addition to practicing full-spectrum family medicine, he worked in a school-based adolescent health clinic and served as the Chief of the Department of Family Medicine. Special interests include adolescent health and pregnancy, community medicine, quality improvement processes and the care of the underserved.

More details about Bernard Birnbaum, M.D.


Cherie Glazner M.D., MSPH, Faculty Physician

A Colorado native who served as a Peace Corps volunteer in North Africa prior to medical school, Dr. Glazner is an honors graduate of the University of Colorado School of Medicine, earning both an M.D. and M.S.P.H.  She completed her family medicine residency at Santa Rosa Community Hospital and subsequently worked for Sutter Health in private practice. She completed her Faculty Development Fellowship at University of California, San Francisco and joined the Fort Collins faculty in 1997.  She loves sharing with the residents her special interests in procedures, women's health, inpatient medicine, international health, and patient stories.  She continues to travel around the world at every opportunity and stays busy outside of medicine raising her teenagers and tending her garden.

More details about Cherie Glazner, M.D., MSPH


Mark Hoenig, M.D, Clinical Faculty

Mark Hoenig, M.D. is a graduate of Case Western Reserve University and the University of Cincinnati School of Medicine where he took special interest in preventive medicine, family practice and nutrition. Doctor Hoenig is a graduate of the Fort Collins Family Practice Residency where he served as Chief Resident and focused on preventive medicine, indigent care and rural health. Upon graduation in 1992, Dr. Hoenig served as a bilingual provider and Medical Director for several years at a migrant community health center in Moses Lake, WA. Thereafter, he returned to Fort Collins where he worked at Salud Clinic and served as a clinical faculty member to local family medicine residents. Currently Dr. Hoenig works part time in a rural family practice, teaches family practice residents, and is expanding his functional medicine practice and therapeutic lifestyle programs with Tri-Life Health P.C.. Dr. Hoenig’s professional interests include nutrition, wellness, prevention, and healthy aging. Doctor Hoenig has lived in Fort Collins for over fifteen years and shares his life with his wife Sue and his four teenage children; Ryan, Eric, Austin and Tessa. He has many interests including running, bicycling, hiking, rock climbing, art, chili peppers, and practicing his Spanish.

More details about Mark Hoenig, M.D.


Zeljko Ivanovic, M.D., Faculty Physician, Psychiatry

Dr. Zeljko Ivanovic has practiced psychiatry on four continents. After graduating from medical school in Serbia and Montenegro, he headed to South Africa and completed his medical internship and attended the psychiatry residency program at the University of Natal in Durban. After passing the USMLE exams, Dr. Ivanovic moved to the USA and completed a residency at the Medical College of Wisconsin. Next, he moved to New Zealand and worked as only one of four Forensic Psychiatrists on the South Island. In 2001 he returned to the United States and worked in the oldest public psychiatric hospital in the USA in Williamsburg, VA. After several years, he joined Alabama Psychiatric Services for a little more than seven years. The allure of a healthy outdoor lifestyle brought the Ivanovic family to Colorado in 2012. He works for the Health District of Northern Larimer County and consults at the Medical Health Clinic, Poudre Valley Hospital, Medical Center of the Rockies, Community Mental Health Center and Mountain Crest Hospital. He also provides consultations at The Family Medicine Center and teaches family practice residents.

More details about Zeljko Ivanovic, M.D.


Tasha P. Marchant, Ph.D., RN, Lifestyle Medicine Educator

Tasha's training includes a B.S./M.S. in health and exercise from Colorado State University and a Ph.D. in nutrition. Tasha coordinates the Clinical Lifestyles Medicine program, and also contributes to the sports nutrition and lifestyle medicine curricula. Her professional interests include health behavior change, motivational interviewing, and using lifestyle modification and exercise in medicine.


Colleen McCreery, D.O., Clinical Faculty

Dr. Colleen McCreery was raised in Colorado Springs. She graduated from the University of California at Santa Barbara with a B.S. in biopsychology in 1994. Dr. McCreery enjoyed one year in St. John, U.S.V.I. before attending medical school. She received her D.O. degree from the Kirksville College of Osteopathic Medicine in Kirksville, Missouri. She completed an AOA/AMA dually accredited family practice residency at the Eastern Maine Medical Center in Bangor, Maine. After completing her training, Dr. McCreery happily returned to Colorado and joined Associates in Family Medicine in September 2002. She began teaching part-time at the Family Medicine Center in 2008. Her practice includes the full spectrum of family medicine with special interests in obstetrics, women's health, and osteopathic manipulative medicine. In her free time, Dr. McCreery enjoys rock climbing, hiking, skiing, yoga, and travel. She is happily married and has two daughters and one dog.

More details about Colleen McCreery, D.O.


Laurie Miller, M.D., Clinical Faculty

Dr. Laurie Miller graduated from the University of Colorado Health Sciences Center School of Medicine. She completed her residency training at the Fort Collins Family Medicine Residency Program in 2004. After working at Community Health Center Inc. in Connecticut for five years, she returned to Fort Collins to join the Salud Family Health Center in May 2009. Her interests include care of the underserved, universal healthcare, diabetes, women's health and obesity. She is fluent in Spanish. She lives in Fort Collins with her husband, Kolby Vaughan, PA-C, and their two children.

More details about Laurie Miller, M.D.


Donna Sullivan, M.D., FAAFP, Faculty Physician

Dr. Sullivan graduated from the University of Missouri-Kansas City School of Medicine (six-year B.A.-M.D. program) at the age of 23. After completing training at the Wright State University Family Medicine Residency in 1985, she and her husband, pediatrician Dr. Bill Sullivan, served in the U.S. Air Force at bases in North Dakota and in Florida for five years. Dr. Sullivan completed the Michigan State University Faculty Development Fellowship in 1993, and the Regional Institute for Health and Environmental Leadership Fellowship in 2003, and was the 2005-06 president of the Colorado Academy of Family Physicians. Joining the Fort Collins Family Medicine Residency Program in 1990, Dr. Sullivan has been actively involved in development of multiple new and/or changing curricula. Her special interests include curriculum development, leadership skills, and faculty development.

More details about Donna L. Sullivan, M.D., FAAFP


Breanna Thompson, D.O., Clinical Faculty

Dr. Breanna Thompson, D.O., graduated from Des Moines University College of Osteopathic Medicine. She completed her residency training at the Fort Collins Family Medicine Residency Program. She joined Salud in July 2012. Her medical interests include women's health including obstetrics, international health, sports medicine and osteopathic manipulation. She enjoys learning Spanish, hiking, knitting, cooking, running and biking. She lives with her husband in Fort Collins.



Pamela S. Webber, M.D., Faculty Physician

A Fort Collins native, Dr. Webber graduated from the University of Colorado Health Sciences Center School of Medicine. She completed her family practice residency with the U.S. Air Force in Fort Worth, Texas, and spent the next four years in various locations as an Air Force physician. Dr. Webber also has served as a faculty member at a residency program in Wheeling, W.Va. Her special interests include lifestyle and behavioral medicine. Dr. Webber earned a master's degree in nutrition from Colorado State University, prior to medical school and recently completed a master's degree in marriage and family therapy.

More details about Pamela S. Webber, M.D.


Rochelle "Chel" Wells, Residency Program Coordinator

Named one of our system's 2013 employees of the year, Chel Wells is the primary contact at the Family Medicine Residency Program. Chel has been with the residency program since 1984 and is a valuable resource. Feel free to contact her with any questions at 970.495.8803 or


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