Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory B Vanzant, D.O.

Cardiovascular Disease Physician in Oklahoma City, OK · enumerated 2005.

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

National Provider Identifier

1932196839

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory B Vanzant

Credential D.O.

Sex Male

Practice address 4200 W Memorial Rd Ste 410, Oklahoma City, OK, 73120

Phone (405) 608-4767

Fax (405) 607-2976

Enumeration date Oct 5, 2005

Last updated in NPPES Jun 6, 2022

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 3703 (OK) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
100131230A	Medicaid	OK	-
0600063404	Other	OK	RAILROAD MEDIARE

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 this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Gregory Vanzant?

Gregory Vanzant is registered in NPPES with the primary taxonomy of Cardiovascular Disease Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Elizabeth Widaski Adult Health Nurse Practitioner · Oklahoma City, OK NPI 1730224924 Michelle Piper Acute Care Clinical Nurse Specialist · Oklahoma City, OK NPI 1336566983

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-06-06.