Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Maria M. Diaz, DMD

Q: What is the NPI number for Maria Diaz?

The National Provider Identifier (NPI) for Maria Diaz is 1346467024, a Type 1 (individual) record in the CMS NPPES registry.

Dentist in Guaynabo, PR · enumerated 2007.

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

National Provider Identifier

1346467024

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Registry record

Entity type Individual (Type 1)

Name Dr. Maria M. Diaz

Credential DMD

Sex Female

Practice address Guaynabo, PR, 00970

Phone (787) 790-1781

Fax (787) 790-2063

Enumeration date Apr 20, 2007

Last updated in NPPES Jul 17, 2015

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

122300000X Dentist Dental Providers · License 2568 (PR) Primary

122300000X Dentist Dental Providers · License 30.024571 (OH) Secondary

DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD 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

What is the NPI number for Maria Diaz?

The National Provider Identifier (NPI) for Maria Diaz is 1346467024, a Type 1 (individual) record in the CMS NPPES registry.

Where does Maria Diaz practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-07-17.