Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory Michael Cowan, M.D.

Allergy & Immunology Physician in Peoria, AZ · enumerated 2009.

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

National Provider Identifier

1164756904

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory Michael Cowan

Credential M.D.

Sex Male

Practice address 9145 W Thunderbird Rd Ste 101, Peoria, AZ, 85381

Phone (623) 815-7800

Fax (623) 815-7900

Enumeration date Sep 27, 2009

Last updated in NPPES Oct 26, 2021

Taxonomy & licenses

207K00000X Allergy & Immunology Physician Allopathic & Osteopathic Physicians · License ME110800 (FL) Secondary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License ME110800 (FL) Secondary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 48556 (AZ) Secondary

207K00000X Allergy & Immunology Physician Allopathic & Osteopathic Physicians · License 48556 (AZ) 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
003990800	Medicaid	FL	-
935585	Medicaid	AZ	-

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

How do I verify Gregory Cowan's NPI record?

Cross-check NPI 1164756904 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1164756904 active?

Yes, as of the latest NPPES snapshot, NPI 1164756904 is active (record last updated 2021-10-26).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-10-26.