Med-Peds Faculty 

Med-Peds Faculty are Internal Medicine and Pediatrics trained faculty in primary care, hospital medicine, and multiple subspecialties, dedicated to provide mentorship and coaching for residents interested in these careers.​ 

William C. Anderson III, MD
Associate Professor - Pediatric Allergy & Immunology
Associate Program Director Allergy & Immunology Fellowship
Internal Medicine and Pediatrics

Bill received his bachelor’s degree from Bucknell University and his MD from Georgetown University School of Medicine. Bill completed his Med-Peds residency at the University of Pittsburgh Medical Center, where he served as Med-Peds chief resident. Following residency, Bill moved west to Colorado where he completed his Allergy and Immunology fellowship at National Jewish Health/University of Colorado.

After completing his fellowship, Bill joined the faculty, where he practices Allergy and Immunology at Children’s Hospital Colorado.  In this role, he is director of the Multidisciplinary Asthma Clinic, associate program director for the Allergy and Immunology fellowship, and co-leads the Children’s pediatric to adult transition efforts.

Bill’s clinical and scholarly interests include severe and difficult-to-treat asthma, transitional care, and incorporation of technology into health care.  Within the Med-Peds residency, he teaches during academic half days and serves on the clinical competency and recruitment committees.  Outside of the hospital, Bill likes hiking, trivia, and playing with his dog Breck.

Tyler Buckner, MD, MSc
Associate Professor - BMT/Hematologic Malignancies
Internal Medicine and Pediatrics​  

Tyler is a native Tennessean and graduate of Rhodes College in Memphis, TN. He attended medical school at the University of North Carolina – Chapel Hill, where he also completed Internal Medicine and Pediatrics residency and a combined adult and pediatric Hematology fellowship. 
Dr. Buckner joined the CUSOM faculty at CU in January 2015, and he holds dual appointments in Hematology and Pediatric Hematology/Oncology. 

Tyler provides clinical care to adults and children with bleeding and clotting disorders, and his research focuses on measurement of patient-reported outcomes in individuals with bleeding disorders. He has been involved with the med-peds residency program as an interviewer and advisor to CU medical students since 2016.

Anne Frank, MD
Assistant Professor of Internal Medicine

Primary Care Physician Denver Health

Dr. Frank is an attending physician at Denver Health practicing primary care for adults and children and an assistant professor of Internal Medicine and Pediatrics at University of Colorado School of Medicine. She received her Bachelors of Science degree from the University of Dayton and her M.D. from Indiana University School of Medicine. She completed a combined Internal Medicine and Pediatrics Residency Program at Brown University Warren Alpert School of Medicine 

Anne is board certified in Internal Medicine and Pediatrics and practices Primary Care at Denver Health. She is active in medical education at the undergraduate and graduate level, including working as a director of the Denver Health Longitudinal Integrated Clerkship. She received a certificate from Teaching Scholars Program at the University of Colorado, and has used this training in curricular design for the residency program, including Academic Half Day Curriculum, CO-REACH (Race, Education, Advocacy, in Public and Community Health).

Anne has additional interests in advocacy and care of vulnerable populations, specifically children in Foster and Kinship care. She works in the Connections for Kids Foster Care Clinic and acts as a Peds Trans/GNB Health Champion. She is also is an active member of the CO-AAP, including the legislative policy committee.

In her free time, Anne enjoys spending time with her husband, 3 children, and dog camping at new sites around Colorado. She is also an avid runner (road and trail) and loves to cross-country ski.

Joseph Kay, MD
Professor of Internal Medicine and Pediatrics
Director of Colorado's Adult and Teen Congenital Heart Disease Program (CATCH)

Dr. Kay has appointments in both Internal Medicine and Pediatrics, and works as a staff cardiologist at both Children’s Hospital Colorado and University of Colorado Hospital. He received his M.D. from State University of New York at Buffalo, and then completed his combined Internal Medicine and Pediatrics residency at the University of Michigan, were he stayed on for an additional year as a Pediatric Chief Resident. He then proceeded to complete a combined fellowship in both adult and pediatric cardiology at Duke University Hospital. 
Dr. Kay has been on faculty at the University of Colorado School of Medicine since 2004, and has serviced as the CATCH Program Director since 2006.  
His clinical and research focus remain outcomes of Adults with congenital heart disease, and he is a member of the Alliance of Adult research in Congenital Disease (AARCC), whose mission is to foster multicenter research in adults with congenital heart disease.  

In addition, he is an invasive cardiologist, performing interventions on children and adults with congenital heart disease. Joe is a fellow of the American College of Cardiology, and a member of the American Heart Association. ​​

Mark Kissler, MD
Assistant Professor of Internal Medicine - Hospital Medicine
Internal Medicine-Pediatric Hospitalist University of Colorado Hospital

Mark received his bachelor's degree from the University of Colorado, holds a Masters in Narrative Medicine from Columbia University, and completed medical school at Baylor College of Medicine in Houston.  He is a proud alumnus of the University of Colorado Med-Peds residency program. He has taught at the University of Colorado Center For Bioethics and Humanities and at the University of Colorado Boulder campus, and works as a hospitalist at University of Colorado Hospital. His academic interests include medical humanities, literature, and medical education.

Outside of work Mark loves spending time with his wife and three children.

Diana Whitney, MD
Primary Care Physician Denver Health
Continuity Clinic Faculty at Sloan's Lake Clinic
Resident Mentor

Diana grew up in the Pacific Northwest, Northern California, and Texas before high-tailing it eastward to Vassar College, where she majored in psychology. After college she spent a year in Nepal helping rural farmers access medical care in Kathmandu (she speaks fluent Nepali) before doing her post-bacc at Tufts in Boston. She later returned to Texas to complete medical school at Baylor College of Medicine in Houston.

She recently completed her Med-Peds residency training at the University of Colorado, and is excited to be staying in Denver! She will be joining the Denver Health team as a combined Med-Peds primary care provider at the new Sloan’s Lake Clinic this fall, where she hopes to help grow a new clinic and continue working closely with residents.
Her academic interests lie in care for the urban underserved, with a focus on advocacy, particularly as it relates to improving access to care for our most medically disenfranchised patients. She especially loves that she gets to do “local global health” here in Denver, working with refugee and immigrant patients, as well as those struggling with homelessness, mental health diagnoses, and substance use. She is also proud to be one of over 50 affirming primary care providers for the Denver Health LGBTQ+ Center of Excellence.
On her days off, you can find her out hiking with husband Max and son Arlo, running with her dog Lola, doing yoga, or tackling various projects around her 1892 house!

Other Med-Peds Faculty:

Debra Anoff, MD - Adult Hospitalist, University of Colorado Hospital

Adam Beitscher, MD - Med-Peds Hospitalist, Denver Health

Elizabeth Boggs, MD - Adult Hospitalist, University of Colorado Hospital

Brian Bost, MD - Med-Peds Hospitalist, CHCO, Kaiser

Geoffrey Capes, MD - Primary Care, University of Colorado Hospital

Ethan Cumbler, MD - Adult Hospitalist, University of Colorado Hospital

Eleanor Comfort, MD - Primary Care, Care of Complex Adult Transitions Clinic - CHCO, Clinic Medical Director - Anschutz IM

Robin Deterding, MD - Pediatric Pulmonary, CHCO

Hillary Dunlevy, MD - Adult Infectious Disease, University of Colorado Hospital

Lauren Galpin, MD - Primary Care, Kaiser

Flavia Hoyte, MD- Allergy/Immunology, National Jewish Health/UCH

Steven Humphrey, MD- Pediatric Hospitalist, CHCO

Arun Kannappan, MD - Adult Intensivist, University of Colorado Hospital

Madhukar Kollengode - Adult Congenital Cardiologist, Kaiser 

Rebecca McGourty, MD- Primary Care, Kaiser

Ricky Mohan, MD - Pediatric Pulmonary, CHCO

Adam Palazzari, MD - Primary Care, private practice

Daniel Reirden, MD - Adolescent Medicine and Infectious Disease, CHCO, former Med-Peds Program Director

Sarah Rowan, MD - Adult Infectious Disease, Denver Health

Kevin Sullivan, MD - Med-Peds Hospitalist, University of Colorado Hospital and CHCO

Jennifer Taylor-Cousar, MD - Pulmonary Sciences & Critical Care, National Jewish Health/ University of Colorado Hospital

Department of Medicine (SOM)

CU Anschutz

Academic Office One

12631 East 17th Avenue


Aurora, CO 80045


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