Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Randy James Grellner, DO

Family Medicine Physician in Cushing, OK · enumerated 2006 · practices at Ahs Oklahoma Physician Group, LLC.

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

National Provider Identifier

1356364376

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Registry record

Entity type Individual (Type 1)

Name Dr. Randy James Grellner

Credential DO

Sex Male

Practice address 1025 E 2nd St, Cushing, OK, 74023

Phone (918) 225-3627

Fax (918) 225-1008

Enumeration date Jul 25, 2006

Last updated in NPPES May 1, 2014

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 3663 (OK) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
100137700B	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.

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Frequently asked questions

How do I verify Randy Grellner's NPI record?

Cross-check NPI 1356364376 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1356364376 active?

Yes, as of the latest NPPES snapshot, NPI 1356364376 is active (record last updated 2014-05-01).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-05-01.