NPPES file of Aug 9, 2026

William Samuel Yancy, M.D., M.H.S.

Internal Medicine Physician · Durham, NC

William Samuel Yancy, M.D., M.H.S. is an internal medicine physician with a practice address in Durham, North Carolina, and NPI 1598851974, issued on Oct 5, 2006. Check the license (North Carolina 2000-01339, as entered in NPPES) on the North Carolina Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1598851974
Name
William Samuel Yancy
Credential
M.D., M.H.S.
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
2000-01339 NC
Self-reported in NPPES; status is on the state search
Practice location
4220 N Roxboro St, Durham, NC 27704
Phone
(919) 684-8111
Enumerated
Oct 5, 2006
Record last updated
May 14, 2014 (not updated in 12 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20140722001636); accepts Medicare assignment
Medical or professional school
Brody School Of Medicine At East Carolina University, 1995
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest internal medicine physician records → All 4,056 in North Carolina → Look up another NPI →

Also registered at 4220 N Roxboro St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Elizabeth Aderoju, MDInternal Medicine Physician1811912033
  2. Khuram Bhutta, M.DHospitalist Physician1740609049
  3. Tracy Black, M.D.Endocrinology, Diabetes & Metabolism Physician1700853660
  4. Susan Blackford, M.D.Internal Medicine Physician1932258944
  5. Gregory Brown, M.D.Psychiatry Physician1881984094
  6. Collin Burks, MDFamily Medicine Physician1578051751

Verify William Samuel Yancy in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersNorth Carolina Medical Board
    Search for license 2000-01339    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the North Carolina license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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84% fewer Medicare Part D claims than the average internal medicine physician in 2024

505 Medicare Part D claims for 99 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.

  1. William Yancy505
  2. Specialty average3,176

Most prescribed

  1. Mounjaro113 claims
  2. Bupropion Xl86 claims
  3. Metformin Hcl Er77 claims
  4. Ozempic67 claims
  5. Naltrexone Hcl60 claims
  6. Topiramate30 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

  1. Duke University Health System, IncDurham, NC

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

William Samuel Yancy among 4,056 internal medicine physician records in North Carolina

William Samuel Yancy, M.D., M.H.S. is one of 4,056 internal medicine physician records with a practice address in North Carolina. 82% 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 12% of them.

  • NPI issued2006 · 12% of these records are older, 52% newer
  • In a Medicare fileYes · 82% of these records are
  • In the CMS Doctors and Clinicians fileYes · 67% of these records are
  • Graduated1995 · median 2004 among the 2,706 with a school on file
  • Record last updated2014 · 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 207R00000X and a North Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

380 internal medicine physician records list a practice address in Durham

They are 380 of the 13,451 NPPES records with a practice address in Durham, and 4,056 internal medicine physician records in North Carolina.

All 4,056 in North Carolina → Every provider in Durham → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Melinda Battaile, M.D.Durham, NC 277041831197094
  2. David Bright, MD, PHARM DDurham, NC 277041003814666
  3. James Brown, MD, MPH, FACPDurham, NC 277041255338489
  4. Amir Darwish, M.D.Durham, NC 277041699767665
  5. Walter Fowler, MD, PHDDurham, NC 277041013913631
  6. Susan Isbey, MDDurham, NC 277041396742730
  7. John Kallianos, MDDurham, NC 277041245231588
  8. Kombiz Klein, DODurham, NC 277041619976297

Common questions

What is William Samuel Yancy, M.D., M.H.S.'s NPI number?

William Samuel Yancy, M.D., M.H.S.'s National Provider Identifier (NPI) is 1598851974, issued on Oct 5, 2006. An NPI identifies a provider in billing; it is not a license.

Where is William Samuel Yancy, M.D., M.H.S. located?

The NPPES record lists a practice address at 4220 N Roxboro St, Durham, NC, 27704. Phone: (919) 684-8111. Providers update this record themselves, so call before visiting.

How can I verify William Samuel Yancy, M.D., M.H.S.'s license?

NPPES lists North Carolina license number 2000-01339, as entered by the provider. 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 Samuel Yancy, M.D., M.H.S. prescribe under Medicare Part D?

In 2024, William Samuel Yancy, M.D., M.H.S. had 505 Medicare Part D claims for 99 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.