Skip to main content
John McMahon, DO, Internal Medicine, Portsmouth, NH, Portsmouth Regional Hospital

JohnAndrewMcMahonDO

Internal Medicine Portsmouth, NH

Sports Medicine (Non-Surgical)

Physician

Dr. McMahon is on Doximity

As a Doximity member you'll join over two million verified healthcare professionals in a private, secure network.

  • Connect with other colleagues in the same hospital or clinic
  • Search all U.S. specialist profiles and refer a patient
  • Read the latest clinical news and earn CME/CEU credits

See Dr. McMahon's full profile

Already have an account?

Education & Training

  • Maine Medical Center
    Maine Medical CenterResidency, Internal Medicine, 2008 - 2011
  • University of New England College of Osteopathic Medicine
    University of New England College of Osteopathic MedicineClass of 2008

Certifications & Licensure

  • NH State Medical License
    NH State License 2013 - 2025
  • ME State Medical License
    ME State License 2011 - 2025
  • VT State Medical License
    VT State License 2013 - 2013
  • American Board of Emergency Medicine Sports Medicine

Publications & Presentations

PubMed

Professional Memberships

Hospital Affiliations