Internal Medicine, Sports Medicine
JOHN MCMAHON DO
Identity confirmed via CMS NPPES · September 30, 2026 · A directory match is not a coverage approval.
Is this your practice? This listing was imported from public provider identity data (CMS NPPES) and has not yet been claimed. Claim this listing to confirm the practice details. Plan acceptance stays unpublished until the practice reports it.
Public record
NPI 1821258062 · enumerated 2008-06-11 · record updated 2017-02-23. Source: CMS NPPES. A listing is not a TRICARE network approval.
NPPES recordGoogle Maps Apple Maps OpenStreetMap
Addresses and phones
- Practice location 1900 LAFAYETTE RD, SUITE A, PORTSMOUTH, NH, 03801-5679 (603) 431-1121 Fax (603) 431-9147 Google Maps Apple Maps OpenStreetMap
- Mailing address 1900 LAFAYETTE RD, SUITE A, PORTSMOUTH, NH, 03801-5679 (603) 431-1121 Fax (603) 431-9147 Google Maps Apple Maps OpenStreetMap
Specialties
- Internal Medicine, Sports Medicine 207RS0010X · Primary · License 16235 NH
- Internal Medicine, Sports Medicine 207RS0010X · License 2237 ME
In this directory
NH Rockingham County Portsmouth Internal Medicine, Sports Medicine
Locations and evidence
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Practice location
PORTSMOUTH, NH, 038015679
Accepting new patientsNot reportedCMS NPPES · September 30, 2026
Plan acceptance
- No published plan acceptance yet. Confirm directly with the practice, or claim this listing if it's yours.