IndividualActive
James Masterson, M.D.
NPI 1699722520 · Specialist · Palo Alto, CA
James Masterson, M.D. is a Specialist provider in Palo Alto, CA (NPI 1699722520).
Provider details
- NPI number
- 1699722520
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G13387 (CA)
Specialties & taxonomies
Other Service Providers
Profile Score
Detailed profile(91/100 index)
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
3801 Miranda Ave
Dept. of Veterans Affairs: Palo Alto Health Care System
Palo Alto, CA 94304-1207
Phone: (650) 493-5000
Fax: (650) 849-0319
Street-level locationGet directions
Mailing address
1855 Oakdell Dr
Menlo Park, CA 94025-6122
Registry dates
- Enumerated
- 2006-05-27
- Last updated
- 2026-04-26
Frequently asked questions
- What is James Masterson's NPI number?
- James Masterson's National Provider Identifier (NPI) is 1699722520, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Masterson's specialty?
- James Masterson is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is James Masterson located?
- James Masterson's practice location on file with NPPES is 3801 Miranda Ave, Palo Alto, CA 94304-1207.
- What is James Masterson's phone number?
- The practice phone number listed in the NPPES registry for James Masterson is (650) 493-5000.
- Is James Masterson's NPI active?
- Yes — James Masterson's NPI (1699722520) is active in the NPPES registry as of the last update on 2026-04-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.