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

Dr. Thomas Ammen Showalter III, DO

Individual provider Internal Medicine Physician · NPI 1780853358

Dr. Thomas Ammen Showalter III, DO is a Medical Oncology in Oklahoma City, Oklahoma. Graduated from Oklahoma State University College of Osteopathic Medicine in 2005, 21 years ago. Practices with Integris Ambulatory Care Corporation, a 683-clinician group and accepts Medicare assignment. Licensed in Oklahoma.

Years since qualifying
21
Trained at
Oklahoma State University College of Osteopathic Medicine
Licensed in
OK
In the registry since
2008
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

5915 W Memorial Rd Ste 200
Oklahoma City, OK 73142-2021
Phone: (405) 773-6400
Fax: (405) 621-5441
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 4869 (OK)

Record details

NPI number1780853358
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedFebruary 27, 2008
Last updated in NPPESJune 27, 2017

Medicare enrollment

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

Medicare specialtyMEDICAL ONCOLOGY
Medical schoolOKLAHOMA STATE UNIVERSITY COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2005 (21 years in practice)
Group practice Integris Ambulatory Care Corporation — 683 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Oklahoma City