William Thomas Clarke, MD
Gastroenterology Physician · Durham, NC
William Thomas Clarke, MD is a gastroenterology physician with a practice address in Durham, North Carolina, and NPI 1477996650, issued on Apr 8, 2013. Check the license on the North Carolina Medical Board; the Medicare figures below come from public CMS files.
- Name
- William Thomas Clarke
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 266026 MA
Self-reported in NPPES; status is on the state search - Practice location
- 40 Medicine Circle, Durham, NC 27710
- Phone
- (919) 684-6437
- Enumerated
- Apr 8, 2013
- Record last updated
- Dec 5, 2023
- Fax
- (919) 681-8147
- Medicare enrollment
- Enrolled (PECOS I20210120002152); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 2013
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 681 in North Carolina → Look up another NPI →
Also registered at 40 Medicine Circle
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Amy Barto, M.D.Gastroenterology Physician1710934443
- Brittney Bohren, PA-CSurgical Physician Assistant1629674866
- Olivia Brown, APRN, AGACNPNurse Practitioner1497444236
- Katharine Ciarrocca, DMD, MSEDOral and Maxillofacial Surgery (Dentist)1487846168
- Clifford Crutcher, M.D.Neurological Surgery Physician1437491305
- Christine Eyler, M.D., PH.D.Radiation Oncology Physician1770859829
Verify William Thomas Clarke in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNorth Carolina Medical BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average gastroenterology physician in 2024
91 Medicare Part D claims for 79 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Gavilyte-G59 claims
- Peg-3350 And Electrolytes11 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.
Bills Medicare through one group practice
- Duke Health Integrated Practice IncDurham, NC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Thomas Clarke among 681 gastroenterology physician records in North Carolina
William Thomas Clarke, MD is one of 681 gastroenterology physician records with a practice address in North Carolina. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 78% of them.
- NPI issued2013 · 78% of these records are older, 20% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated2013 · median 2002 among the 498 with a school on file
- Record last updated2023 · 48% 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 North Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in North Carolina
There are 681 gastroenterology physician records in North Carolina.
All 681 in North Carolina → Every provider in Durham → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Amy Barto, M.D.Durham, NC 277101710934443
- Carla Brady, M.D.Durham, NC 277101811070055
- Malcolm Branch, MDDurham, NC 277101639252877
- Audrey BroomeDurham, NC 277101992888135
- Rebecca Burbridge, M.D.Durham, NC 277101184630972
- John Geneczko, M.D.Durham, NC 277101902875727
- Judith GentileDurham, NC 277101497838650
- Elizabeth GoacherDurham, NC 277101841373008
Common questions
What is William Thomas Clarke, MD's NPI number?
William Thomas Clarke, MD's National Provider Identifier (NPI) is 1477996650, issued on Apr 8, 2013. An NPI identifies a provider in billing; it is not a license.
Where is William Thomas Clarke, MD located?
The NPPES record lists a practice address at 40 Medicine Circle, Durham, NC, 27710. Phone: (919) 684-6437. Providers update this record themselves, so call before visiting.
How can I verify William Thomas Clarke, MD's license?
Search the North Carolina Medical Board at https://portal.ncmedboard.org/verification/search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Thomas Clarke, MD prescribe under Medicare Part D?
In 2024, William Thomas Clarke, MD had 91 Medicare Part D claims for 79 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.