James Byrne, MD
NPI 1831134097 · Maternal & Fetal Medicine Physician · San Jose, CA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Byrne, MD is a Maternal & Fetal Medicine Physician provider in San Jose, CA (NPI 1831134097).
Provider details
- NPI number
- 1831134097
- Entity type
- Individual
- Primary specialty
- Maternal & Fetal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G74780 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
- 2006-06-19
- Last updated
- 2025-09-11
Frequently asked questions
- What is James Byrne's NPI number?
- James Byrne's National Provider Identifier (NPI) is 1831134097, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Byrne's specialty?
- James Byrne is listed in the NPPES registry with a primary specialty of Maternal & Fetal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is James Byrne located?
- James Byrne's practice location on file with NPPES is 751 S Bascom Ave, San Jose, CA 95128-2604.
- What is James Byrne's phone number?
- The practice phone number listed in the NPPES registry for James Byrne is (408) 885-5000.
- Does James Byrne accept Medicare?
- James Byrne is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Byrne's NPI active?
- Yes — James Byrne's NPI (1831134097) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.