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Associate and Assistant Program Directors


​Associate Program Directors


Karen Chacko, MD was born and raised in the San Francisco Bay Area. She attended Medical School at UC San Diego. She completed her internship, residency and chief residency here at the University of Colorado. She has been GIM faculty here since completing her training. She is the mother of two bright and beautiful young girls and enjoys hiking, running, camping, and reading. Dr. Chacko is the senior Associate Program Director and the Director of the Primary Care track.

Mel Anderson, MD is from Houston, Texas, where he graduated AOA from Medical School at the University of Texas. He completed residency training, a chief resident year, and three additional staff years at David Grant USAF Medical Center in Northern California before moving to Rhode Island for four years. He was on staff at the Providence VA and on the faculty of Brown Medical School. Mel’s outside interests include spending time with his spouse Maria and daughter Claire; mountain biking, rock climbing, and skiing. Dr Anderson joined the University of Colorado faculty in 2005 and is an Associate Program Director. He leads the Hospital Medicine Section at the Denver VAMC and directs the Journal Club Classics curriculum and the new Clinician/Educator Pathway.
Diana Mancini, MD is originally from Lake Tahoe, California. Didi attended the University of Colorado, Boulder for undergrad studying Environmental Biology and Biochemistry. After a year of diabetes research she attended the University of Colorado School of Medicine; Didi remained here to complete her internship, residency, and chief residency at the University of Colorado. In 2007 Didi joined the faculty at Denver Health Medical Center as a hospitalist and is now the associate program director for that facility. Her current research focus is the safety of information transfer and handoffs within medicine. She is married and has a toddler at home. Her interests outside of medicine include golf, yoga, cooking, and gardening. Dr. Mancini is an Associate Program Director with a particular interest in resident mentorship.
Darlene Tad-y, MD is originally from Chicago, IL. She completed her residency training at Lutheran Medical Center in Brooklyn, NY and fellowship training at Johns Hopkins Bayview Medical Center in Baltimore. She joined the hospital medicine group at the University of Colorado where she works closely with the residents in the Hospitalist Training program, teaching about QI and the business of medicine. Darlene also enjoys cooking, rock climbing and camping. She joined the residency program as an Assistant Program Director in 2011.
Katie Heist, MD is originally from Philadelphia, PA. She went to Dartmouth College then moved to Denver to attend the University of Colorado School of Medicine where she graduated AOA. After medical school, Katie entered the Primary Care Track of the University of Colorado Internal Medicine Residency Program. She completed her training in 2009, followed by a chief resident year. She is currently a primary care physician at the University of Colorado and became an Assistant Program Director for the residency program in 2011. Her interests outside of medicine include hiking, running, snowshoeing, and traveling. Heist 2.jpg
Brian Graham, MD Brian Graham is an Assistant Professor in the Divison of Pulmonary Sciences and Critical Care Medicine at the University of Colorado. He completed Bachelor’s and Master’s degrees in electrical engineering at MIT, medical school at Harvard, and residency in internal medicine and pulmonary-critical care fellowship at the University of Colorado. His clinical work is primarily in the areas of pulmonary hypertension and hereditary hemorrhagic telangiectasia. His research studies the inflammatory pathogenesis of pulmonary hypertension, primarily using a model of schistosomiasis-induced disease. His research is funded by a K08 from the NHLBI, the Parker B. Francis Foundation, Gilead, Pfizer, the ATS/Pulmonary Hypertension Association, and Novartis. Outside of medicine, Brian enjoys skiing and hiking with his wife and son. Brian leads the research track and helps residents applying to fellowship. Brian Graham



​Director PTSP Track

Arthur Gutierrez-Hartmann, MD was born in Mexico City and grew up in San Antonio, Texas, with Spanish as his first language. He received a BA in Chemistry in 1971 from the University of Texas at Austin, and then graduated with an MD from the University of Texas Southwestern Medical School (UTSW) in 1975. From 1971-1977, he also pursued graduate studies purifying yeast citrate synthase from yeast mitochondria in Dr. Ron Butow’s lab in the Biochemistry Dept at UTSW. From 1977-80, he completed Internal Medicine residency training at Stanford University Hospital, and from 1980-83, he completed a Molecular Endocrinology training fellowship with Dr. John Baxter at UCSF. After an initial faculty position at UCSF (1983-85), he was recruited to the University of Colorado HSC in 1985, where he was a founding member of the MD/PhD Training Program (1985; now MSTP), the Molecular Biology Graduate Program (1986), the Cancer Center (1987), the Reproductive Biology Graduate Program (2004), the CCTSI TL1 (2008), and the Physician-Scientist Training Program (2011). Arthur has served in leadership positions in national associations dealing with graduate and physician-scientist training, on Council of the American Cancer Society (ACS), and he serves on multiple editorial boards, including Associate Editor of Molecular Endocrinology. Arthur has been selected for many awards and visiting professorships, including: an A. P. Giannini/Bank of America Fellowship; a PEW Scholar Award in the Biomedical Sciences; elected to the American Society of Clinical Investigation; a NSF-CNRS Visiting Scientist, IGBMC, Illkirch, France; the 2002 SACNAS Distinguished Scientist of the Year Award; the 2008 AACR Jane Coffin Wright - Minority in Cancer Research Award; the 2009 Endocrine Society’s Distinguished Educator Award; and the inaugural ASBMB 2010 Ruth Kirchstein Diversity in Science Award. The main focus of the AGH laboratory is to determine the role of ETS transcription factors in epithelial cell development and tumorigenesis, with a focus on pituitary mammary and GI model systems. He has been supported by NIH R01 grants to pursue this research work, with PEW, ACS, DOD and NSF also providing support. As a clinician he attends patients with endocrine disorders, focusing on pituitary tumors and thyroid cancer. Finally, Arthur has been highly committed to the recruitment and training of women and underrepresented students to all aspects of the biomedical workforce.



​Assistant Director of PC Track

Jennifer Adams, MD is originally from Denver and graduated AOA from the University of Colorado School of Medicine. She did her residency in the Primary Care Program at the University of California, San Francisco. In 2005, Jennifer returned to Denver and joined the Division of General Internal Medicine at Denver Health. She is the Director of Education for General Internal Medicine at Denver Health and also serves as the Westside resident continuity clinic director. She has a strong interest in HIV and underserved populations. Outside of medicine, Jennifer enjoys skiing, travelling, and hiking with her husband, twin boys, and golden retriever. Dr. Adams is the Assistant Program Director for the Primary Care Program and oversees the HIV training program and elective.