Robert J. Williams, MD
Internal Medicine Physician · Chapel Hill, NC
Robert J. Williams, MD is an internal medicine physician with a practice address in Chapel Hill, North Carolina, and NPI 1891323689, issued on Mar 29, 2020. Check the license on the North Carolina Medical Board; the Medicare figures below come from public CMS files.
- Name
- Robert J. Williams
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 12420123-1205 UT
Self-reported in NPPES; status is on the state search - Practice location
- 130 Mason Farm Road Bioinformatics Building CB# 7030, Chapel Hill, NC 27599
- Phone
- (919) 966-2537
- Enumerated
- Mar 29, 2020
- Record last updated
- May 15, 2024
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 4,056 in North Carolina → Look up another NPI →
Verify Robert J. Williams 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
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
21 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
Robert J. Williams among 4,056 internal medicine physician records in North Carolina
Robert J. Williams, MD 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 2020, is newer than 89% of them.
- NPI issued2020 · 89% of these records are older, 8% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 67% of these records are
- Record last updated2024 · 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).
219 internal medicine physician records list a practice address in Chapel Hill
They are 219 of the 7,608 NPPES records with a practice address in Chapel Hill, and 4,056 internal medicine physician records in North Carolina.
All 4,056 in North Carolina → Every provider in Chapel Hill → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Marco Aleman, MDChapel Hill, NC 275991275558520
- Timothy Carey, MDChapel Hill, NC 275991407871759
- Paul Chelminski, MDChapel Hill, NC 275991609891969
- Cristin Colford, MDChapel Hill, NC 275991801829478
- Darren Dewalt, MDChapel Hill, NC 275991962435537
- James Evans, MDChapel Hill, NC 275991932124203
- Russell Harris, MDChapel Hill, NC 275991083639355
- Thomas Keyserling, MDChapel Hill, NC 275991336164615
Common questions
What is Robert J. Williams, MD's NPI number?
Robert J. Williams, MD's National Provider Identifier (NPI) is 1891323689, issued on Mar 29, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Robert J. Williams, MD located?
The NPPES record lists a practice address at 130 Mason Farm Road Bioinformatics Building CB# 7030, Chapel Hill, NC, 27599. Phone: (919) 966-2537. Providers update this record themselves, so call before visiting.
How can I verify Robert J. Williams, 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 Robert J. Williams, MD prescribe under Medicare Part D?
In 2024, Robert J. Williams, MD had 21 Medicare Part D claims; 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.