William M. Tierney, MD
Gastroenterology Physician · Oklahoma City, OK
William M. Tierney, MD is a gastroenterology physician with a practice address in Oklahoma City, Oklahoma, and NPI 1255300513, issued on Mar 17, 2006. Check the license (Oklahoma 20307, as entered in NPPES) on the Oklahoma Board of Medical Licensure and Supervision; the Medicare figures below come from public CMS files.
- Name
- William M. Tierney
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 20307 OK
Self-reported in NPPES; status is on the state search - Practice location
- 825 NE 10TH St, Oklahoma City, OK 73104
- Phone
- (405) 271-8478
- Enumerated
- Mar 17, 2006
- Record last updated
- Jan 18, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20060105000759); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 1990
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 160 in Oklahoma → Look up another NPI →
Also registered at 825 NE 10TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William M. Tierney 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 20307Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average gastroenterology physician in 2024
159 Medicare Part D claims for 73 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Omeprazole29 claims
- Pantoprazole Sodium20 claims
- Gavilyte-C18 claims
- Colestipol Hcl14 claims
- Omeprazole-Sodium Bicarbonate11 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): 71.7 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).
Bills Medicare through one group practice
- OU Health Partners IncOklahoma City, OK
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William M. Tierney among 160 gastroenterology physician records in Oklahoma
William M. Tierney, MD 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
- Graduated1990 · median 2000 among the 106 with a school on file
- Record last updated2011 · 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
- Teddy Bader, MDOklahoma City, OK 731041386612588
- Hussein Bitar, MDOklahoma City, OK 731041548525645
- Javid Fazili, MDOklahoma City, OK 731041386612620
- Ralph Guild, MDOklahoma City, OK 731041245208438
- Richard Harty, MDOklahoma City, OK 731041205804457
- Courtney Houchen, MDOklahoma City, OK 731041063427649
- Donald Kastens, MDOklahoma City, OK 731041659349801
- Mohammad Madhoun, MDOklahoma City, OK 731041083754147
Common questions
What is William M. Tierney, MD's NPI number?
William M. Tierney, MD's National Provider Identifier (NPI) is 1255300513, issued on Mar 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William M. Tierney, MD located?
The NPPES record lists a practice address at 825 NE 10TH St, Oklahoma City, OK, 73104. Phone: (405) 271-8478. Providers update this record themselves, so call before visiting.
How can I verify William M. Tierney, MD's license?
NPPES lists Oklahoma license number 20307, 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 William M. Tierney, MD prescribe under Medicare Part D?
In 2024, William M. Tierney, MD had 159 Medicare Part D claims for 73 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is William M. Tierney, MD's MIPS final score?
The 2023 MIPS final score is 71.7 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.