Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory Nelson Bigelow, D.M.D.

General Practice Dentistry in Grants Pass, OR · enumerated 2005.

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

National Provider Identifier

1821080177

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory Nelson Bigelow

Credential D.M.D.

Sex Male

Practice address 350 Meridian Way, Grants Pass, OR, 97527

Phone (541) 476-4199

Fax (541) 476-7166

Enumeration date Aug 22, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License D5659 (OR) 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 Gregory Bigelow practice?

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

What is the NPI number for Gregory Bigelow?

The National Provider Identifier (NPI) for Gregory Bigelow is 1821080177, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Peter Pastrell General Practice Dentistry · Grants Pass, OR NPI 1750373197

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