Internal Medicine in Okc, OK

5 active Internal Medicine providers practice in Okc, Oklahoma according to the latest NPPES snapshot. Profiles include the NPI number, taxonomy code, license state, and practice address.

Internal Medicine providers in Okc, OK
NPI	Name	Type	Specialty	Location
1326028663	Allen Hamaker	Individual	Internal Medicine Physician	Okc, OK
1720158397	Allen J Hamaker, MD PC	Organization	Internal Medicine Physician	Okc, OK
1649229097	Dennis Parker	Individual	Pulmonary Disease Physician	Okc, OK
1639697402	Jagjit Khosla	Individual	Cardiovascular Disease Physician	Okc, OK
1740245745	Nancy Nagle	Individual	Pulmonary Disease Physician	Okc, OK

Frequently asked questions

How many Internal Medicine providers are in Okc, OK?

The latest NPPES snapshot lists 5 active Internal Medicine providers with a practice address in Okc, Oklahoma.

How do I check a Internal Medicine provider's NPI in Okc?

Open a profile below to see the NPI number, taxonomy code, and practice address, then verify against the official NPPES registry — every profile links directly to the CMS record.

Source: CMS NPPES (public data). Snapshot 2026-07-11.