John O'Brian, MD
NPI 1740256817 · Endocrinology, Diabetes & Metabolism Physician · Norfolk, VA
John O'Brian, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Norfolk, VA (NPI 1740256817).
Provider details
- NPI number
- 1740256817
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 0101045036 (VA)
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
- 2006-02-27
- Last updated
- 2009-12-02
Frequently asked questions
- What is John O'Brian's NPI number?
- John O'Brian's National Provider Identifier (NPI) is 1740256817, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John O'Brian's specialty?
- John O'Brian is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is John O'Brian located?
- John O'Brian's practice location on file with NPPES is 855 W Brambleton Ave, Norfolk, VA 23510-1005.
- What is John O'Brian's phone number?
- The practice phone number listed in the NPPES registry for John O'Brian is (757) 446-5908.
- Is John O'Brian's NPI active?
- Yes — John O'Brian's NPI (1740256817) is active in the NPPES registry as of the last update on 2009-12-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.