Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Grant K. Gillish D.D.S., P.L.L.C.

Dentist in Whitehall, MI · enumerated 2017 · authorized official Grant Gillish, Owner/Dentist.

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

National Provider Identifier

1801319025

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Registry record

Entity type Organization (Type 2)

Legal business name Grant K. Gillish D.D.S., P.L.L.C.

Other name <Unavail>

Practice address 116 W Colby St Ste 1, Whitehall, MI, 49461

Phone (231) 893-2915

Fax (231) 893-4719

Enumeration date Jul 19, 2017

Last updated in NPPES Jul 21, 2022

Taxonomy & classification

122300000X Dentist Dental Providers · License 2901020310 (MI) Primary

Authorized official

Name Grant Gillish

Title Owner/Dentist

Phone (231) 893-2915

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 type of organization is Grant K. Gillish D.D.S., P.L.L.C.?

Grant K. Gillish D.D.S., P.L.L.C. is registered in NPPES as a Dentist (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.