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

Individual provider Internal Medicine Physician · NPI 1225010655

Steven Louis Fillmore, MD is an Internal Medicine in Ada, Oklahoma. Graduated from University of Oklahoma College of Medicine in 1982, 44 years ago. Practices with Chickasaw Nation Division of Health, a 243-clinician group and accepts Medicare assignment. Licensed in Oklahoma.

Years since qualifying
44
Trained at
University of Oklahoma College of Medicine
Licensed in
OK
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1921 Stonecipher Blvd
Ada, OK 74820
Phone: (580) 421-4570
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 14295 (OK)

Record details

NPI number1225010655
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedNovember 21, 2005
Last updated in NPPESSeptember 14, 2016

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF OKLAHOMA COLLEGE OF MEDICINE
Graduated 1982 (44 years in practice)
Group practice Chickasaw Nation Division Of Health — 243 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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