Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gary Raymond Denny, D.O.

Addiction Medicine (Internal Medicine) Physician in Tulsa, OK · enumerated 2006.

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

National Provider Identifier

1558393637

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Registry record

Entity type Individual (Type 1)

Name Gary Raymond Denny

Credential D.O.

Sex Male

Practice address 5310 E 31st St Fl 11 Ste 1102, Tulsa, OK, 74135

Phone (918) 561-1700

Fax (918) 561-1701

Enumeration date Jul 7, 2006

Last updated in NPPES Mar 29, 2022

Taxonomy & licenses

207RA0401X Addiction Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 2858 (OK) Primary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 2858 (OK) Secondary

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
100136930D	Medicaid	OK	-
798213	Other	OK	MEDICARE

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

Is NPI 1558393637 active?

Yes, as of the latest NPPES snapshot, NPI 1558393637 is active (record last updated 2022-03-29).

How do I verify Gary Denny's NPI record?

Cross-check NPI 1558393637 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Samuel Martin Psychiatry Physician · Tulsa, OK NPI 1467659953 Alina Messick Physician Assistant · Tulsa, OK NPI 1962754218 Kelly Dunn Addiction Medicine (Psychiatry & Neurology) Physician · Tulsa, OK NPI 1477972495 Trevor Anderson Addiction Medicine (Preventive Medicine) Physician · Tulsa, OK NPI 1912392341 Lowell Robertson Addiction Medicine (Psychiatry & Neurology) Physician · Tulsa, OK NPI 1164070314

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-03-29.