Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Gregory Jay Williams

Clinical Psychologist in Apison, TN · enumerated 2006.

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

National Provider Identifier

1215916804

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Gregory Jay Williams

Sex Male

Practice address Apison, TN, 37302

Phone (423) 899-2204

Fax (423) 698-4045

Enumeration date Jan 11, 2006

Last updated in NPPES Oct 10, 2008

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License P0000001910 (TN) Primary

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 Williams?

The National Provider Identifier (NPI) for Gregory Williams is 1215916804, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gregory Williams practice?

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

Other providers at this practice address

Browse all →

Leona Gulley Professional Counselor · Apison, TN NPI 1962559492 Joelle Marlin Clinical Social Worker · Apison, TN NPI 1356966097

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-10-10.