Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Allen J Hamaker, MD

Individual provider Internal Medicine Physician · NPI 1326028663

Dr. Allen J Hamaker, MD is an Internal Medicine in Okc, Oklahoma. Graduated from Wayne State University School of Medicine in 1990, 36 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in Oklahoma.

Years since qualifying
36
Trained at
Wayne State University School of Medicine
Licensed in
OK
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

3613 NW 56th St Ste 140
Okc, OK 73112
Phone: (405) 949-6481
Fax: (405) 795-5908
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 20735 (OK)

Record details

NPI number1326028663
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJanuary 20, 2006
Last updated in NPPESOctober 14, 2014
Mailing address3613 Nw 56th St., Suite 140, Okc, OK 73112

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolWAYNE STATE UNIVERSITY SCHOOL OF MEDICINE
Graduated 1990 (36 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount