About
Dr. Peter O'Donnell founded Harbourside Family Practice in Yarmouth, Maine in the summer of 1993. He built his practice around the belief that personal relationships are the core of good medicine. Staff and patients alike know him as Dr. Peter.
Dr. O'Donnell specializes in family medicine and manages chronic conditions including diabetes, thyroid disorders, high blood pressure, high cholesterol, and weight management. He also conducts Travel Medicine consultations for patients planning international trips. He personally handles after-hours on-call coverage for urgent patient needs. Outside the office, Dr. O'Donnell is an avid mountain biker, hiker, and boater. He and his wife Mary settled in Maine over 25 years ago and raised their two children here.
Education & Training
Family Medicine Physician
Conditions Treated
Who is Dr. O'Donnell right for?
Dr. O'Donnell is a strong fit for adults and families seeking a long-term relationship with a single physician. Patients managing chronic conditions like diabetes, thyroid disorders, high blood pressure, or high cholesterol benefit from his thorough approach. He also serves patients who travel internationally and need pre-trip vaccination and prevention guidance. Anyone who values direct access to their doctor, including after-hours calls, will find his practice model well suited to them.
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Frequently Asked Questions
Dr. O'Donnell treats a broad range of conditions in family medicine. His chronic disease management work includes diabetes, thyroid disorders, high blood pressure, high cholesterol, and weight management. He also handles sick care, injuries, women's health, and pediatric care from infants through teens.
Yes. Dr. O'Donnell personally handles after-hours on-call coverage for urgent patient calls. Patients can call the office to get the on-call contact information. He does not hand urgent calls off to an outside service.
Yes. Dr. O'Donnell runs a Travel Medicine Clinic as a specialty service separate from primary care. Consultations run between 45 and 90 minutes and cover your health history, travel plans, and prevention strategies. He reviews immunization records and administers required vaccines including Polio, Hepatitis A and B, Yellow Fever, and Tetanus.
Dr. O'Donnell conducts comprehensive physical exams over a full hour. Follow-up appointments run 30 minutes. This schedule gives him meaningful time with each patient at every visit.
Yes. Dr. O'Donnell offers telemedicine appointments for eligible visits. For patients monitoring blood pressure at home, he recommends the OMRON Series 10 blood pressure cuff and asks that patients visit the office once for calibration before using it for remote appointments.
Dr. O'Donnell models his practice on the tradition of the small-town family doctor. He takes a thorough, relationship-driven approach and personally follows up with patients by phone when warranted. His practice keeps a smaller patient panel so he can give each patient genuine attention at every visit.
Yes. Dr. O'Donnell provides pediatric care for patients from infants through teens. Harbourside Family Practice serves families across age groups under one roof.
Doctor profile last updated June 11, 2026