Dr. Onion specializes in internal medicine, adult and geriatric medicine and family medicine. A faculty member in the Maine-Dartmouth Family Practice Residency program, he has practiced in this area since 1980.
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Dr. Onion specializes in internal medicine, adult and geriatric medicine and family medicine. A faculty member in the Maine-Dartmouth Family Practice Residency program, he has practiced in this area since 1980.
RESIDENCY
Mary Hitchcock Memorial Hospital
MEDICAL SCHOOL
Jacobs School Of Medicine & Biomedical Sciences At The Univ Of Buffalo - 1997
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