NPI Portal NPI Lookup & Verification

Dr. Gregory Brian Somerville, D.C.

Dr. Gregory Brian Somerville is a Chiropractor provider (Chiropractor) practicing in Ardmore, OK, registered in the NPPES registry with NPI 1609927284 since 2007. The credential DC stands for Doctor of Chiropractic. Practices at Somerville Chiropractic Center, Inc. (listed at the same practice address in NPPES).

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI 1609927284
Entity type Individual (Type 1)
Name Dr. Gregory Brian Somerville
Credential D.C.
Sex Male
Practice address Ardmore, OK, 73401
Phone 5802249091
Fax 5802249048
Enumeration date 2007-01-12
Last updated in NPPES 2022-05-04

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

Taxonomy & licenses

Taxonomy code Specialty Primary License State
111N00000X Chiropractor Primary 3435 OK

DC — Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential

Copy-ready billing details
Provider: Gregory Somerville, D.C.
NPI: 1609927284
Taxonomy: 111N00000X (Chiropractor)
Address: Ardmore, OK, 73401

Other providers at this practice address

NPI Name Type Specialty Location
1730402355 Somerville Chiropractic Center, Inc. Organization Chiropractor Ardmore, OK

Verify this record

Cross-check NPI 1609927284 against the authoritative CMS record: view Dr. Gregory Brian Somerville on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

What specialty is Gregory Somerville?
Gregory Somerville is registered in NPPES with the primary taxonomy of Chiropractor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2022-05-04.