PC Program Leadership

Program Director and Assistant Directors


Sacro_YasminYasmin Sacro, MD is a proud second-generation Filipina raised in San Diego, California who completed her BA in Biological Sciences and Economics at the University of Chicago, then graduated from the University of Chicago Pritzker School of Medicine. She completed her residency and chief year in internal medicine at Scripps Mercy Hospital in San Diego. She then served as a Core Faculty member at the University of Chicago and is also a National Health Service Corps Member. She joined the Division of General Internal Medicine at the University of Colorado in 2015 and provides primary care at Denver Health Eastside Clinic. Her primary academic interests include care of underserved populations, diversity, and medical education. Outside of medicine Dr. Sacro spends her time reading, trying the newest exercise boutique, enjoying cultural arts, and chasing her 3 children. Dr. Sacro is the Program Director of the Primary Care Residency Track of the University of Colorado at Denver Health.


Karen Chacko, MD was born and raised in the San Francisco Bay Area. She attended undergraduate and medical school at UC San Diego. She completed her internship, residency and chief residency here at the University of Colorado in the Primary Care track. She has been GIM faculty here since completing her training. Karen enjoys hiking, running, camping, biking and cooking with her two beautiful girls and husband.

Dr. Chacko is the Associate Program Director of the Primary Care Program of the Internal Medicine Residency Program.


Cleeves_MichelleMichelle Cleeves, MD is originally from Boulder, CO and graduated from the University of Colorado School of Medicine. She did her residency at Montefiore Medical Center in the Bronx, NY in the Social Internal Medicine program. After finishing residency in 2012, she returned to Colorado and joined the Division of General Internal Medicine at Denver Health. Michelle has strong interests in underserved populations and Women’s Health. She joined the leadership of the Primary Care track as director for journal clubs and video review curriculum. Michelle enjoys camping, hiking, rafting, and cooking.


Frank_JoeJoe Frank, MD, MPH attended medical school at Indiana University, and completed a Primary Care/Internal Medicine Residency and Chief Residency at Brown University in Providence, RI. He then pursued a General Internal Medicine Fellowship at Brigham and Women’s Hospital and an MPH at the Harvard School of Public Health. Joe joined the faculty at the University of Colorado in 2013. Joe is a primary care physician at the Denver VA Medical Center and the Co-Director for Research for the Primary Care Residency Program. His work focuses on chronic pain management and opioid safety in primary care. Joe enjoys running, camping, hiking and (one day) skiing with his wife and three young children.


Christine Haynes, MDChristine Haynes, MD, MPH was born in New York and studied international affairs and global health at Georgetown University. She received her MD and MPH from Northwestern University and then completed her residency and chief year in Internal Medicine/Primary Care at UCLA. Christine is a primary care physician at Denver Health and works both at the Westside Clinic and the Intensive Outpatient Clinic, as well as supervising residents on general inpatient wards. Her interests include women’s health, underserved populations, population health and quality improvement, and advance care planning. Christine enjoys running, biking, traveling, live music,  and exploring new places. However, she spends most of her time reading children’s books in funny voices and dancing in the kitchen with her two young children. Christine is the Assistant Program Director for the Primary Care Residency Track. 

Nicklas_JacindaJacinda Mawson Nicklas, MD, MPH, MA grew up in Woodside, California. She completed her BA in Human Biology and her MA in Anthropology at Stanford University. She received her MD from Harvard Medical School and completed her residency in Internal Medicine and Primary Care at Brigham and Women's Hospital in Boston, Massachusetts. She received her MPH from the Harvard School of Public Health and completed her clinical research fellowship in Integrative Medicine and General Medicine at Harvard Medical School. Her research focuses on women’s health, obesity, lifestyle change, and disease prevention. Her current research uses websites and mobile apps to help postpartum women who are at elevated risk for diabetes and heart disease. Outside of medicine she enjoys spending time with her husband and three children as well as running, skiing, hiking, swimming, and cycling. Dr. Nicklas is the co-director of Primary Care Research and oversees PC resident research projects.