Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Allen William Cortez, M.D.

Surgery Physician in Santa Rosa, CA · enumerated 2006.

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

National Provider Identifier

1518916089

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Registry record

Entity type Individual (Type 1)

Name Allen William Cortez

Credential M.D.

Sex Male

Practice address 1701 4th St, Ste 200, Santa Rosa, CA, 95404

Phone (707) 579-2100

Fax (707) 523-0616

Enumeration date May 10, 2006

Last updated in NPPES Feb 7, 2012

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License G76718 (CA) Primary

2086S0127X Trauma Surgery Physician Allopathic & Osteopathic Physicians · License G76718 (CA) Secondary

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
00G767181	Medicaid	CA	-
P00469229	Other	CA	RR MEDICARE
00G767180	Other	CA	BS OF CALIFORNIA
00G767180	Medicaid	CA	-

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 Allen Cortez?

Allen Cortez is registered in NPPES with the primary taxonomy of Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-02-07.