Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Neil Hammer, DMD

Dentist in Kalispell, MT · enumerated 2007.

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

National Provider Identifier

1548309057

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Registry record

Entity type Individual (Type 1)

Name Dr. William Neil Hammer

Credential DMD

Sex Male

Practice address 1035 1st Ave W, Kalispell, MT, 59901

Phone (406) 751-8113

Fax (406) 751-8148

Enumeration date Feb 5, 2007

Last updated in NPPES Dec 16, 2015

Taxonomy & licenses

122300000X Dentist Dental Providers · License 1803 (MT) Primary

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

Where does William Hammer practice?

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

What is the NPI number for William Hammer?

The National Provider Identifier (NPI) for William Hammer is 1548309057, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-12-16.