Dr. Clark B. Zimmerman, III, also known as “Dr. Z” founded this practice in 1973. He cared for the Parker Community for 28 years and retired in 2001.
Dr. Clark B. Zimmerman, IV, like his name, followed in his father’s footsteps. He has become affectionately known as “Dr. Ben”, as it was easier for all to differentiate between father and son.
Dr. Zimmerman attended Douglas County High School, then completed his undergraduate degree at Colorado College. He obtained his medical degree at the University of Colorado Medical School. Dr. Zimmerman performed his residency training at Harrisburg Hospital in Pennsylvania where he was a chief resident.
Following residency, in 1997, Dr. Zimmerman decided to return to his hometown and join his father in practice. He and his wife Lori have two sons and a daughter. Dr. Zimmerman has always loved Colorado and is excited to raise his own family here. During time away from the office, he enjoys hiking, fishing, gardening, trains, and time with his family.
“Dr. Ben” emphasizes sports medicine, colon cancer screening, well child, and adult care.
Heather Dahm, PA-C was born in Boulder, Colorado. She then moved with her family to Southwestern Colorado where she graduated from Pagosa Springs high school. She completed her undergraduate degree in Cell and Molecular biology at Fort Lewis College in Durango Colorado. Heather worked in multiple healthcare positions in Tulsa, OK, and Houston, TX before going on to earn her Masters degree in Physician Assistant Studies at the University of Texas Medical Branch.
Heather is excited to be back in Colorado practicing as a Physician Assistant at Hilltop Family Physicians. She enjoys spending time with her fiancé and their black lab exploring the outdoors. She also enjoys running, cooking, and reading.
Felicity Kerivan, PA-C is originally from Australia but has travelled extensively, eventually settling in the US over 10 years ago. She received her Physician Assistant degree from DeSales University in Pennsylvania where she was awarded the Clinical Award for Excellence in patient care. Prior to her career as PA-C, she received a Masters in Health Sciences in healthcare management from Johns Hopkins University where she also worked in clinical research, disaster preparedness and emergency response. She and her husband recently relocated to Colorado and enjoy spending their free time exploring their new home.
Christie A Dalton, PA-C was born in Kansas and has lived many places between there and here. Prior to becoming a physician assistant she was a registered dietitian specializing in the care of patients with kidney disease. She graduated from the PA Program at Red Rocks Community College in Lakewood. She also received her Master’s Degree in Medical Science from St. Francis University.
When not at work, Christie enjoys a lot of outdoor activities such as backpacking, skiing, running and horseback riding. She and her husband love going to Alaska and canoeing rivers there. Christie’s daughter attend UNC in Greeley and is in the pre-nursing program. They enjoy spending time together no matter the activity. She is very happy to be working here at Hilltop and looks forward to new relationships with her patients.