Clinton Graves Wallis, M.D.
Gastroenterology Physician · Oklahoma City, OK
Clinton Graves Wallis, M.D. is a gastroenterology physician with a practice address in Oklahoma City, Oklahoma, and NPI 1255384483, issued on May 18, 2006. Check the license (Oklahoma 24646, as entered in NPPES) on the Oklahoma Board of Medical Licensure and Supervision; the Medicare figures below come from public CMS files.
- Name
- Clinton Graves Wallis
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 24646 OK
Self-reported in NPPES; status is on the state search - Practice location
- 6516 N Olie Ave Ste A, Oklahoma City, OK 73116
- Phone
- (405) 486-6960
- Enumerated
- May 18, 2006
- Record last updated
- Feb 17, 2025
- Fax
- (405) 486-6961
- Medicaid ID
- . OK
- Medicare enrollment
- Enrolled (PECOS I20060718000281); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 160 in Oklahoma → Look up another NPI →
Also registered at 6516 N Olie Ave Ste A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Amy James, PA-CPhysician Assistant1679132823
Verify Clinton Graves Wallis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOklahoma Board of Medical Licensure and Supervision
Search for license 24646Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% more Medicare Part D claims than the average gastroenterology physician in 2024
1,168 Medicare Part D claims for 381 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Pantoprazole Sodium420 claims
- Omeprazole292 claims
- Esomeprazole Magnesium52 claims
- Colestipol Hcl51 claims
- Gavilyte-G35 claims
- Mesalamine32 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $116.23
4 payments; by number, the most common kind was food and beverage; the largest payer was Olympus America Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Hpi Physicians LLCOklahoma City, OK
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Clinton Graves Wallis among 160 gastroenterology physician records in Oklahoma
Clinton Graves Wallis, M.D. is one of 160 gastroenterology physician records with a practice address in Oklahoma. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 31% of them.
- NPI issued2006 · 31% of these records are older, 38% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1998 · median 2000 among the 106 with a school on file
- Record last updated2025 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Oklahoma practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Oklahoma
There are 160 gastroenterology physician records in Oklahoma.
All 160 in Oklahoma → Every provider in Oklahoma City → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Jean Abed, M.D.Oklahoma City, OK 731201528371754
- Ahmad Al-Taee, M.D.Oklahoma City, OK 731201467837880
- Deborah Blalock, MDOklahoma City, OK 731201477592186
- Neil Crittenden, M.D.Oklahoma City, OK 731121598907115
- Andrea Fernandez, MDOklahoma City, OK 731201548883994
- Amarilys Fernandez-Maldonado, MDOklahoma City, OK 731121952895906
- Alyssa Grossen, MDOklahoma City, OK 731121912498411
- William Kakish, M.D.Oklahoma City, OK 731201851300438
Common questions
What is Clinton Graves Wallis, M.D.'s NPI number?
Clinton Graves Wallis, M.D.'s National Provider Identifier (NPI) is 1255384483, issued on May 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Clinton Graves Wallis, M.D. located?
The NPPES record lists a practice address at 6516 N Olie Ave Ste A, Oklahoma City, OK, 73116. Phone: (405) 486-6960. Providers update this record themselves, so call before visiting.
How can I verify Clinton Graves Wallis, M.D.'s license?
NPPES lists Oklahoma license number 24646, as entered by the provider. Search the Oklahoma Board of Medical Licensure and Supervision at https://www.okmedicalboard.org/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Clinton Graves Wallis, M.D. prescribe under Medicare Part D?
In 2024, Clinton Graves Wallis, M.D. had 1,168 Medicare Part D claims for 381 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.