Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Steven E Diaz, MD

Q: What is the NPI number for Steven Diaz?

The National Provider Identifier (NPI) for Steven Diaz is 1346201522, a Type 1 (individual) record in the CMS NPPES registry.

Emergency Medicine Physician in Waterville, ME · enumerated 2006.

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

National Provider Identifier

1346201522

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Registry record

Entity type Individual (Type 1)

Name Steven E Diaz

Credential MD

Sex Male

Practice address 149 North St, Mgha Hospitalist Program, Waterville, ME, 04901

Phone (207) 626-1018

Fax (207) 626-1214

Enumeration date Mar 29, 2006

Last updated in NPPES Jul 30, 2008

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 014039 (ME) Primary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 014039 (ME) 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
336020099	Medicaid	ME	-

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 Steven Diaz?

The National Provider Identifier (NPI) for Steven Diaz is 1346201522, a Type 1 (individual) record in the CMS NPPES registry.

Where does Steven Diaz practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-07-30.