James Tappan, M.D.
NPI 1801880398 · Obstetrics & Gynecology Physician · San Mateo, CA
James Tappan, M.D. is a Obstetrics & Gynecology Physician provider in San Mateo, CA (NPI 1801880398).
Provider details
- NPI number
- 1801880398
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A23884 (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
- 2005-09-12
- Last updated
- 2023-03-07
Frequently asked questions
- What is James Tappan's NPI number?
- James Tappan's National Provider Identifier (NPI) is 1801880398, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Tappan's specialty?
- James Tappan is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is James Tappan located?
- James Tappan's practice location on file with NPPES is 20 W 3rd Ave, San Mateo, CA 94402-7112.
- What is James Tappan's phone number?
- The practice phone number listed in the NPPES registry for James Tappan is (650) 347-5065.
- Is James Tappan's NPI active?
- Yes — James Tappan's NPI (1801880398) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.