James Gemmer, M.D.
NPI 1366578585 · Orthopaedic Surgery Physician · Fairfield, CA
James Gemmer, M.D. is a Orthopaedic Surgery Physician provider in Fairfield, CA (NPI 1366578585).
Provider details
- NPI number
- 1366578585
- Entity type
- Individual
- Primary specialty
- Orthopaedic Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- C33183 (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
19 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
- 2007-02-23
- Last updated
- 2007-07-08
Frequently asked questions
- What is James Gemmer's NPI number?
- James Gemmer's National Provider Identifier (NPI) is 1366578585, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Gemmer's specialty?
- James Gemmer is listed in the NPPES registry with a primary specialty of Orthopaedic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is James Gemmer located?
- James Gemmer's practice location on file with NPPES is 11 Country Club Dr, Fairfield, CA 94534-1305.
- What is James Gemmer's phone number?
- The practice phone number listed in the NPPES registry for James Gemmer is (707) 864-1824.
- Is James Gemmer's NPI active?
- Yes — James Gemmer's NPI (1366578585) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.