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
Assistant Professor Pediatric Allergy & Immunology
Associate Program Director Allergy & Immunology Fellowship
Internal Medicine and Pediatrics

William Anderson, MDBill 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
Assistant Professor BMT/Hematologic Malignancies
Internal Medicine and Pediatrics​  

Tyler Buckner 150Tyler 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.

Nick Breitnauer, MD
Assistant Professor of Internal Medicine and Pediatrics
Primary Care Physician Denver Health
Continuity Clinic Faculty
Resident Coach
Med-Peds Phase IV Student Elective Course Co-Director

Nick Breitnauer 150Nick has lived a geographically anchored life. Growing up in rural western Colorado, he completed his undergraduate and medical school training at the University of Colorado at Boulder and then Anschutz campuses, respectively. The timely creation of a new Med-Peds residency at CU seemed almost too good to be true given the beauty of the state and the quality of the internal medicine and pediatric residency programs.

He joined Denver Health in the fall of 2018 and works as a primary care provider at the Southwest Federico Pena Family Health Center. Clinical duties also include working with residents in continuity clinic and 4 weeks per year as an inpatient attending on the pediatric wards.

Nick enjoys all things Colorado, especially skiing, camping, and the Denver Broncos. All other free time is spent with his wife, Brooke, and his son, Max.  

Carolina Gutierrez, MD
Instructor of Internal Medicine

Primary Care Physician Denver Health
Resident Mentor

Carolina was born in Peru and lived there till she was 11 years old. She then moved to Texas with her family, and established a new home in America. She graduated from Texas Women’s University, and obtained her medical degree from UT Southwestern . She moved to Colorado for residency, and graduated from the Colorado Med-Peds program in June 2020. She joined Denver Health later that summer and works full time as a primary care provider at the Sam Sandos Westside Health Center. She is involved in the residency’s advocacy, diversity and inclusion, and recruitment efforts. 

She loves spending time with her family and friends, traveling, finding new places to explore, and Latin dancing!

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

Joseph Kay 150Dr. 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. ​​

Amber Khanna, MD
Associate Professor Cardiology
Medical Director Cardiovascular Center
Internal Medicine and Pediatrics​ 
Resident Mentor 

Amber Khanna 150Amber’s clinical and research interests are congenital heart disease, Marfan syndrome and related disorders, and pregnancy associated heart disease. She received her bachelor’s degree from the University of South Dakota and started medical school there. She finished medical school at the University of Texas Southwest Medical Center. She did her internal medicine and pediatrics training at the University of North Carolina – Chapel Hill. At Mayo Clinic, she did an adult cardiology fellowship and an adult congenital heart disease fellowship. 
She joined the faculty of University of Colorado in the Department of Medicine and Department of Pediatrics in 2011. She sees patients in her outpatient clinics, reads echocardiograms at University of Cardiology Hospital, and attends on the adult cardiology inpatient service. 

She enjoys spending time with her husband and their three children. They all like skiing, hiking, and travelling. 

Meghann Kirk, MD
​​Continuity Clinic Faculty
Assistant Professor of Internal Medicine and Pediatrics
Primary Care Physician Denver Health
Continuity Clinic Faculty 

Meghann Kirk 150Dr. Kirk graduated from University of Colorado at Boulder with a degree in Biology and spent 15 years in Washington, DC where she attended Georgetown University School of Medicine and completed her Medicine and Pediatrics combined residency in 2009.    

At Georgetown she was a core faculty preceptor in Med-Peds continuity clinic and GIM resident clinic, and she was active in medical student and resident teaching in the clinic, hospital, and classroom. She also enjoyed taking care of patients of all ages and teaching as a volunteer at the HOYA family shelter clinic.  
She feels fortunate for the time she spent in Honduras teaching residents and helping to train village community health workers. While in DC she also completed formalized training in mind-body medicine and enjoys integrating this training in her clinical practice and education roles.  
She joined Denver Health at the new Southwest Federico Pena Family Health Center in 2016 and she has enjoyed seeing patients of all ages in this every special community. She loves teaching in continuity clinic and will take over as clerkship director for the Adult Ambulatory Care block in November 2016.  

She enjoys hiking, yoga, cooking, skiing and dance and is elated to be back in Colorado.​

Mark Kissler, MD
Instructor of Internal Medicine - Hospital Medicine
Internal Medicine-Pediatric Hospitalist University of Colorado HospitalMark Kissler

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

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

Robin Deterding, MD- Pediatric Pulmonary, CHCO

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

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

Madhukar Kollengode- Adult Congenital Heart, University of Colorado Hospital, CHCO

Anne Hall, MD- Neonatology, University of Colorado Hospital

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

Ricky Mohan, MD- Pediatric Pulmonary, CHCO

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

Sarah Rowan, MD- Adult Infectious Disease, Denver Health