NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

James L. Stammer, MD

Gastroenterology Physician in Edmond, OK · enumerated 2007 · authorized official James Stammer, Owner/Gastroenterologist.

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

National Provider Identifier

1447443171

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name James L. Stammer, MD
Practice address 3401 Ridgewood Dr, Edmond, OK, 73013
Phone (405) 285-6601
Fax (405) 285-0600
Enumeration date Aug 27, 2007
Last updated in NPPES Aug 27, 2007

Taxonomy & classification

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 11162 (OK) Primary

Authorized official

Name James Stammer
Title Owner/Gastroenterologist
Phone (405) 285-6601

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

Who is the authorized official for James L. Stammer, MD?
NPPES lists James Stammer (Owner/Gastroenterologist) as the authorized official for this organization.
What is the NPI number for James L. Stammer, MD?
The NPI for James L. Stammer, MD is 1447443171, a Type 2 (organization) record in the CMS NPPES registry.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-08-27.