Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Brian Matthew Zimmer, D.O.

Emergency Medicine Physician in Oklahoma City, OK · enumerated 2009.

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

National Provider Identifier

1447589056

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Registry record

Entity type Individual (Type 1)

Name Dr. Brian Matthew Zimmer

Credential D.O.

Sex Male

Practice address Oklahoma City, OK, 73109

Phone (405) 481-9515

Enumeration date Dec 9, 2009

Last updated in NPPES Feb 16, 2026

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 26432 (MS) Primary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 2024041635 (MO) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 4826 (OK) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License OS18890 (FL) Secondary

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
200267650A	Medicaid	OK	-

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Brian Zimmer?

Brian Zimmer is registered in NPPES with the primary taxonomy of Emergency Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-16.