Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Gregory B. Clay, O.D.,F.A.A.O
Optometrist in Durant, OK · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1023031994
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Registry record
Entity type Individual (Type 1)
Name Dr. Gregory B. Clay
Credential O.D.,F.A.A.O
Sex Male
Practice address 1901 University Blvd., Durant, OK, 74701
Phone (580) 920-2020
Fax (580) 924-5656
Enumeration date Jul 25, 2006
Last updated in NPPES Mar 16, 2026
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 100761430A | Medicaid | OK | - |
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.
Frequently asked questions
How do I verify Gregory Clay's NPI record?
Cross-check NPI 1023031994 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1023031994 active?
Yes, as of the latest NPPES snapshot, NPI 1023031994 is active (record last updated 2026-03-16).
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-03-16.