Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Diana Louise Tomezak, MASTERS SOCIAL WORK

Clinical Social Worker in Grosse Pointe Woods, MI · enumerated 2024.

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

National Provider Identifier

1598527459

Verified

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Registry record

Entity type Individual (Type 1)

Name Mrs. Diana Louise Tomezak

Credential MASTERS SOCIAL WORK

Sex Female

Practice address 1675 Fairholm, Grosse Pointe Woods, MI, 48236

Phone (248) 376-0935

Enumeration date Jan 26, 2024

Last updated in NPPES Jan 26, 2024

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 6801064063 (MI) Primary

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 Diana Tomezak practice?

The practice location on file with NPPES is in Grosse Pointe Woods, MI. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Diana Tomezak?

The National Provider Identifier (NPI) for Diana Tomezak is 1598527459, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-01-26.