Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Gregory G Diel, DPH
Pharmacist in Enid, OK · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1649350158
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Registry record
Entity type Individual (Type 1)
Name Gregory G Diel
Credential DPH
Sex Male
Practice address 915 E Owen K Garriott Rd, Enid, OK, 73701
Phone (580) 233-4244
Fax (580) 233-5319
Enumeration date Oct 17, 2006
Last updated in NPPES May 18, 2022
Taxonomy & licenses
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
What specialty is Gregory Diel?
Gregory Diel is registered in NPPES with the primary taxonomy of Pharmacist. 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.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-05-18.