New doctors at Trinity Health

Trinity Health has added two physicians in the specialties of pediatrics and physical medicine and rehabilitation.

William Sisa is a pediatrician dedicated to providing up-to-date, holistic care to children and adolescents. Reared in Ghana, he earned his medical degree from St. George’s University School of Medicine and completed his pediatric residency at Lincoln Medical and Mental Health Center, a teaching hospital affiliated with Weill Cornell Medical College in New York City. His experience includes teaching and mentoring of high school students in the science field.

Jason Coombs is a physiatrist specializing in Physical Medicine and Rehabilitation. In addition to providing outpatient care, he also serves as medical director of Trinity Health’s inpatient rehabilitation center. Coombs earned his Doctor of Osteopathic Medicine from Touro University California and completed his PM&R residency at Mary Free Bed Rehabilitation Hospital in Grand Rapids. His experience includes medical service across three different continents as part of the U.S. Air Force and Air National Guard. He’s been active in community service, including a 20-year involvement with the Boy Scouts of America and coaching youth sports teams.


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