Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Grant Thomas Sisk, DMD

Q: What is the NPI number for Grant Sisk?

The National Provider Identifier (NPI) for Grant Sisk is 1285554006, a Type 1 (individual) record in the CMS NPPES registry.

Dentist in Hyndman, PA · enumerated 2026.

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

National Provider Identifier

1285554006

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Registry record

Entity type Individual (Type 1)

Name Dr. Grant Thomas Sisk

Credential DMD

Sex Male

Practice address 144 5th Ave, Hyndman, PA, 15545

Phone (814) 842-3206

Enumeration date Jul 20, 2026

Last updated in NPPES Jul 20, 2026

Taxonomy & licenses

122300000X Dentist Dental Providers · License DS045909 (PA) 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

What is the NPI number for Grant Sisk?

The National Provider Identifier (NPI) for Grant Sisk is 1285554006, a Type 1 (individual) record in the CMS NPPES registry.

Where does Grant Sisk practice?

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

Other providers at this practice address

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Victor Felipa Internal Medicine Physician · Hyndman, PA NPI 1053311639 Eugene Nallin Family Medicine Physician · Hyndman, PA NPI 1376539965 Mark Rader Obstetrics & Gynecology Physician · Hyndman, PA NPI 1396734950 Brian Stratta Family Medicine Physician · Hyndman, PA NPI 1730140146 William Cattell Family Medicine Physician · Hyndman, PA NPI 1093746612 Elizabeth Claar Medical Physician Assistant · Hyndman, PA NPI 1982839411 Jeanne Pfeilsticker Family Medicine Physician · Hyndman, PA NPI 1619295979 Hyndman Area Health Center, Inc. Federally Qualified Health Center (FQHC) · Hyndman, PA NPI 1487075131

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-07-20.