William Clay Lancaster, D.O.
Internal Medicine Physician · Greensboro, NC
William Clay Lancaster, D.O. is an internal medicine physician with a practice address in Greensboro, North Carolina, and NPI 1922480037, issued on Jun 25, 2015. Check the license (North Carolina 2018-01808, as entered in NPPES) on the North Carolina Medical Board; the Medicare figures below come from public CMS files.
- Name
- William Clay Lancaster
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 2018-01808 NC
Self-reported in NPPES; status is on the state search - Practice location
- 1200 N Elm St # 3509, Greensboro, NC 27401
- Phone
- (336) 832-4380
- Enumerated
- Jun 25, 2015
- Record last updated
- Jan 10, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicaid ID
- 1922480037 NC
- Medicare enrollment
- Enrolled (PECOS I20180924000004); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 2015
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 4,056 in North Carolina → Look up another NPI →
Also registered at 1200 N Elm St # 3509
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Alvin PowellFamily Medicine Physician1962889592
Verify William Clay Lancaster in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNorth Carolina Medical Board
Search for license 2018-01808Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average internal medicine physician in 2024
570 Medicare Part D claims for 258 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 17 claims were for opioids.
Most prescribed
- Clopidogrel39 claims
- Atorvastatin Calcium28 claims
- Prednisone27 claims
- Pantoprazole Sodium22 claims
- Eliquis21 claims
- Rosuvastatin Calcium21 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
- Moses Cone Physician Services, IncGreensboro, NC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Clay Lancaster among 4,056 internal medicine physician records in North Carolina
William Clay Lancaster, D.O. 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 2015, is newer than 76% of them.
- NPI issued2015 · 76% of these records are older, 22% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2015 · median 2004 among the 2,706 with a school on file
- Record last updated2019 · 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).
149 internal medicine physician records list a practice address in Greensboro
They are 149 of the 8,190 NPPES records with a practice address in Greensboro, and 4,056 internal medicine physician records in North Carolina.
All 4,056 in North Carolina → Every provider in Greensboro → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mary Baxley, MDGreensboro, NC 274011063474971
- Bruce Brodie, M.D.Greensboro, NC 274011629030341
- Stephanie Brown, MDGreensboro, NC 274011952350241
- Denise Fisher, M.D.Greensboro, NC 274011245272111
- Mohammad Garba, M.D.Greensboro, NC 274011235177809
- Edwin Green, MDGreensboro, NC 274011235199183
- John Jenkins, M.D.Greensboro, NC 274011265496228
- Jerry Joines, M.D.Greensboro, NC 274011528014537
Common questions
What is William Clay Lancaster, D.O.'s NPI number?
William Clay Lancaster, D.O.'s National Provider Identifier (NPI) is 1922480037, issued on Jun 25, 2015. An NPI identifies a provider in billing; it is not a license.
Where is William Clay Lancaster, D.O. located?
The NPPES record lists a practice address at 1200 N Elm St # 3509, Greensboro, NC, 27401. Phone: (336) 832-4380. Providers update this record themselves, so call before visiting.
How can I verify William Clay Lancaster, D.O.'s license?
NPPES lists North Carolina license number 2018-01808, 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 Clay Lancaster, D.O. prescribe under Medicare Part D?
In 2024, William Clay Lancaster, D.O. had 570 Medicare Part D claims for 258 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.
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.