James Mcmahon, M.D.
NPI 1770539413 · Diagnostic Radiology Physician · Fairfield, CA
James Mcmahon, M.D. is a Diagnostic Radiology Physician provider in Fairfield, CA (NPI 1770539413).
Provider details
- NPI number
- 1770539413
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G33081 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-25
- Last updated
- 2012-04-04
Frequently asked questions
- What is James Mcmahon's NPI number?
- James Mcmahon's National Provider Identifier (NPI) is 1770539413, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Mcmahon's specialty?
- James Mcmahon is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is James Mcmahon located?
- James Mcmahon's practice location on file with NPPES is 1200 B Gale Wilson Blvd, Fairfield, CA 94533-3552.
- What is James Mcmahon's phone number?
- The practice phone number listed in the NPPES registry for James Mcmahon is (707) 429-3600.
- Is James Mcmahon's NPI active?
- Yes — James Mcmahon's NPI (1770539413) is active in the NPPES registry as of the last update on 2012-04-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.