Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Maria D Diaz, NP

Q: What is the NPI number for Maria Diaz?

The National Provider Identifier (NPI) for Maria Diaz is 1457532723, a Type 1 (individual) record in the CMS NPPES registry.

Family Nurse Practitioner in Middletown, NY · enumerated 2007.

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

National Provider Identifier

1457532723

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Registry record

Entity type Individual (Type 1)

Name Maria D Diaz

Credential NP

Sex Female

Practice address 111 Maltese Dr, Middletown, NY, 10940

Phone (845) 342-4774

Fax (845) 818-7555

Enumeration date Nov 15, 2007

Last updated in NPPES Mar 26, 2018

Taxonomy & licenses

363LW0102X Women's Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License F420537-1 (NY) Secondary

363LW0102X Women's Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 423706 (NY) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 336990 (NY) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential

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

Where does Maria Diaz practice?

The practice location on file with NPPES is in Middletown, NY. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Maria Diaz?

The National Provider Identifier (NPI) for Maria Diaz is 1457532723, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-03-26.