Aaron Patrick Fieker, D.O.
Gastroenterology Physician · Tulsa, OK
Aaron Patrick Fieker, D.O. is a gastroenterology physician with a practice address in Tulsa, Oklahoma, and NPI 1326268079, issued on Apr 26, 2007. Check the license (Oklahoma 4758, as entered in NPPES) on the Oklahoma Board of Medical Licensure and Supervision; the Medicare figures below come from public CMS files.
- Name
- Aaron Patrick Fieker
- Credential
- D.O.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 4758 OK
Self-reported in NPPES; status is on the state search - Practice location
- 10210 E 91St St, Tulsa, OK 74133
- Phone
- (918) 940-8500
- Enumerated
- Apr 26, 2007
- Record last updated
- May 22, 2025
- Medicare enrollment
- Enrolled (PECOS I20120724000346); accepts Medicare assignment
- Medical or professional school
- Oklahoma State University College Of Osteopathic Medicine, 2005
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 10210 E 91St St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alison Anderson, C.R.N.A.Certified Registered Nurse Anesthetist1497176895
- Zena Barkat, RDN/LDRegistered Dietitian1295287506
- Sheldon Berger, D.O.Gastroenterology Physician1114982089
- Jeffrey Bigler, M.D.Gastroenterology Physician1164419362
- William Briggs, M.D.Gastroenterology Physician1730176884
- Mary ChelfFamily Nurse Practitioner1821617077
Verify Aaron Patrick Fieker 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 4758Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average gastroenterology physician in 2024
1,713 Medicare Part D claims for 644 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims.
Most prescribed
- Pantoprazole Sodium205 claims
- Omeprazole203 claims
- Gavilyte-G197 claims
- Peg-3350 And Electrolytes117 claims
- Sod Sulf-Potass Sulf-Mag Sulf69 claims
- Linzess65 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 79.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,841.03
104 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie 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 2 group practices
- Gastroenterology Specialists, Inc.Tulsa, OK
- St. John Physicians, Inc.Tulsa, OK
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gastroenterology Physician providers in Oklahoma
There are 160 gastroenterology physician records in Oklahoma.
Other gastroenterology physician records in Oklahoma
- Jean Abed, M.D.Oklahoma City, OK1528371754
- Ahmed Abdelsatar Ali AbomhyaOklahoma City, OK1841810850
- Katy Adams, MDOklahoma City, OK1427686765
- Haresh Ajmera, MDTulsa, OK1780747261
- Mohamad Al-Rifai, DOTulsa, OK1033670369
- Ahmad Al-Taee, M.D.Oklahoma City, OK1467837880
- Ijlal Akbar Ali, MDOklahoma City, OK1023423977
- Tauseef Ali, M.D.Oklahoma City, OK1417096041
- Amer Alkhatib, MDTulsa, OK1487740296
- Peter Aran, M.D.Tulsa, OK1689661878
Common questions
What is Aaron Patrick Fieker, D.O.'s NPI number?
Aaron Patrick Fieker, D.O.'s National Provider Identifier (NPI) is 1326268079, issued on Apr 26, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Aaron Patrick Fieker, D.O. located?
The NPPES record lists a practice address at 10210 E 91St St, Tulsa, OK, 74133. Phone: (918) 940-8500. Providers update this record themselves, so call before visiting.
How can I verify Aaron Patrick Fieker, D.O.'s license?
NPPES lists Oklahoma license number 4758, 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 Aaron Patrick Fieker, D.O. prescribe under Medicare Part D?
In 2024, Aaron Patrick Fieker, D.O. had 1,713 Medicare Part D claims for 644 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Aaron Patrick Fieker, D.O.'s MIPS final score?
The 2023 MIPS final score is 79.4 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.