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

Dr. Clinton Graves Wallis, MD

Individual provider Gastroenterology Physician · NPI 1255384483

Dr. Clinton Graves Wallis, MD is a Gastroenterology in Oklahoma City, Oklahoma. Qualified in 1998, 28 years ago. Practices with Hpi Physicians LLC, a 49-clinician group and accepts Medicare assignment. Licensed in Oklahoma.

Years since qualifying
28
Licensed in
OK
In the registry since
2006
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

6516 N Olie Ave Ste A
Oklahoma City, OK 73116-7399
Phone: (405) 486-6960
Fax: (405) 486-6961
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 24646 (OK)

Record details

NPI number1255384483
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 18, 2006
Last updated in NPPESFebruary 17, 2025
Certification dateFebruary 17, 2025

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1998 (28 years in practice)
Group practice Hpi Physicians Llc — 49 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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