Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory Glen Seltzer, D.D.S.

General Practice Dentistry in Hamilton, MT · enumerated 2007.

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

National Provider Identifier

1578619714

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory Glen Seltzer

Credential D.D.S.

Sex Male

Practice address 215 N 10th St, Suite D, Hamilton, MT, 59840

Phone (406) 363-5300

Fax (406) 363-0308

Enumeration date Jan 27, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 1591 (MT) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

Other identifiers

Identifier	Type	State	Issuer
129857	Medicaid	MT	-

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 Gregory Seltzer?

The National Provider Identifier (NPI) for Gregory Seltzer is 1578619714, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gregory Seltzer practice?

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

Other providers at this practice address

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Eli Johnson General Practice Dentistry · Hamilton, MT NPI 1154529121

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.