1. Home
  2. Directory
  3. Oklahoma
  4. Okc
  5. Internal Medicine
  6. NPI Profile

ALLEN J HAMAKER, MD PC
NPI 1720158397
Internal Medicine in Okc, OK

Active since November 09, 2006
3613 NW 56TH ST, SUITE 140, OKC, OK 73112(405) 949-6481(405) 795-5908 Get Directions Write a Review

NPPES record last updated: September 25, 2014. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Allen J Hamaker, Md Pc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ALLEN J HAMAKER, MD PC (NPI 1720158397) is a healthcare organization registered as an internal medicine in Okc, Oklahoma and active in the NPI registry since November 2006. The organization lists Allen J Hamaker, Coo, as its authorized official.

NPPES Registry Identity

NPI1720158397
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameALLEN J HAMAKER, MD PC
Location Address3613 NW 56TH ST, SUITE 140Okc, OK 73112
Mailing Address3613 Nw 56th St., Suite 140Okc, OK 73112 · (405) 949-6481 · Fax (405) 795-5908
Phone(405) 949-6481
Fax(405) 795-5908
Organization SubpartNo
Authorized OfficialAllen J HamakerCoo · (405) 949-6481
Enumeration DateNovember 9, 2006
Last NPPES UpdateSeptember 25, 2014
✔ NPI 1720158397 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedSpecialistTaxonomy 174400000X · License 20735 (OK)
3613 NW 56TH ST, Okc, OK 73112
Open in Google Maps ↗

Other Identifiers 3

Medicaid100060090AOK
Medicare UPINF39402OK
Medicare PIN300522161OK

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Allen J Hamaker, Md Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Allen J Hamaker, MD PC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Allen Hamaker, MD
Internal Medicine
NPI 1326028663
3613 NW 56TH ST. SUITE 140
Okc, OK 73112
(405) 949-6481
✔ PECOS✔ Accepts MedicareSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Allen J Hamaker, MD PC's NPI number?

The NPI number for Allen J Hamaker, MD PC is 1720158397. It was assigned to this organization in the NPPES registry on November 9, 2006.

Where is Allen J Hamaker, MD PC located?

Allen J Hamaker, MD PC is located at 3613 NW 56th St Suite 140, Okc, OK 73112. The listed phone number is (405) 949-6481.

What is Allen J Hamaker, MD PC's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Allen J Hamaker, MD PC enrolled in Medicare?

Yes. Allen J Hamaker, MD PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Allen J Hamaker, MD PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Allen J Hamaker, MD PC. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Allen J Hamaker, MD PC was last updated on September 25, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.