Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Diane Miller Cortez, CNM, NP

Obstetrics & Gynecology Nurse Practitioner in Phoenix, AZ · enumerated 2006.

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

National Provider Identifier

1922101278

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Registry record

Entity type Individual (Type 1)

Name Mrs. Diane Miller Cortez

Credential CNM, NP

Sex Female

Practice address 4212 N. 16th Street, Phoenix, AZ, 85016

Phone (602) 263-1511

Fax (602) 263-1637

Enumeration date Sep 5, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

363LX0001X Obstetrics & Gynecology Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN034375 (AZ) Primary

367A00000X Advanced Practice Midwife Physician Assistants & Advanced Practice Nursing Providers · License RN034375 (AZ) Secondary

CNM · Certified Nurse Midwife: An advanced practice nurse specializing in pregnancy, childbirth, and reproductive care. About the CNM credential

Other identifiers

Identifier	Type	State	Issuer
AZ0145560	Other	AZ	BCBS
756918	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

What specialty is Diane Cortez?

Diane Cortez is registered in NPPES with the primary taxonomy of Obstetrics & Gynecology Nurse Practitioner. 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 2025-09-11.