Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Maxine Victoria Gerken, MD

Surgery Physician in Phoenix, AZ · enumerated 2005.

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

National Provider Identifier

1518966035

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Registry record

Entity type Individual (Type 1)

Name Dr. Maxine Victoria Gerken

Credential MD

Sex Female

Practice address 4212 N 16th St, Integrated Surgical Service, Phoenix, AZ, 85016

Phone (602) 263-1200

Fax (602) 200-5366

Enumeration date Jul 18, 2005

Last updated in NPPES Jun 30, 2015

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License G64845 (CA) 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
00G648450	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 Maxine Gerken?

Maxine Gerken 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 2015-06-30.