Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John T. O'Brian, MD

Endocrinology, Diabetes & Metabolism Physician in Norfolk, VA · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1740256817

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Registry record

Entity type Individual (Type 1)

Name Dr. John T. O'Brian

Credential MD

Sex Male

Practice address 855 W Brambleton Ave, Norfolk, VA, 23510

Phone (757) 446-5908

Fax (757) 446-7055

Enumeration date Feb 27, 2006

Last updated in NPPES Dec 2, 2009

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 0101045036 (VA) Secondary

207RE0101X Endocrinology, Diabetes & Metabolism Physician Allopathic & Osteopathic Physicians · License 0101045036 (VA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
PAR	Other	VA	CIGNA
PAR	Other	VA	USA MANAGED CARE
PAR	Other	VA	FIRST HEALTH COMMERCIAL/SOUTHERN HEALTH/COVENTRY
PAR	Other	VA	VIRGINIA HEALTH NETWORK
004980212	Medicaid	VA	-
0542I	Other	NC	BC/BS
890542I	Medicaid	NC	-
PAR	Other	VA	VIRGINIA PREMIER HEALTH
PAR	Other	VA	AETNA
PAR	Other	VA	CORVEL/CORCARE
PAR	Other	VA	MULTIPLAN
-033	Other	VA	TRICARE/CHAMPUS
006036830	Medicaid	VA	-
081216	Other	VA	ANTHEM
215706	Other	VA	UHC/MAMSI
099037	Other	VA	ANTHEM
15446	Other	VA	SENTARA OPTIMA

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is NPI 1740256817 active?

Yes, as of the latest NPPES snapshot, NPI 1740256817 is active (record last updated 2009-12-02).

How do I verify John O'Brian's NPI record?

Cross-check NPI 1740256817 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Edward Buescher Pediatric Infectious Diseases Physician · Norfolk, VA NPI 1053316034 Romesh Khardori Endocrinology, Diabetes & Metabolism Physician · Norfolk, VA NPI 1811984602 Leon Georges Endocrinology, Diabetes & Metabolism Physician · Norfolk, VA NPI 1811961626 Donald Richardson Endocrinology, Diabetes & Metabolism Physician · Norfolk, VA NPI 1932176765 Maria Winn Family Nurse Practitioner · Norfolk, VA NPI 1487621488 Phyllis Woodson Registered Dietitian · Norfolk, VA NPI 1790753382 Elizabeth Jenkins Endocrinology, Diabetes & Metabolism Physician · Norfolk, VA NPI 1124086129 Elias Siraj Endocrinology, Diabetes & Metabolism Physician · Norfolk, VA NPI 1699871533

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-12-02.