Linus Clark Williams, MD, PHD
Internal Medicine Physician · Burlington, MA
Linus Clark Williams, MD, PHD is an internal medicine physician with a practice address in Burlington, Massachusetts, and NPI 1811671522, issued on Jun 13, 2023. Check the license (Massachusetts 3015290, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Linus Clark Williams
- Credential
- MD, PHD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 3015290 MA
Self-reported in NPPES; status is on the state search - Practice location
- 67 S Bedford St Ste 202, Burlington, MA 01803
- Phone
- (781) 744-7000
- Enumerated
- Jun 13, 2023
- Record last updated
- Aug 3, 2026
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 67 S Bedford St Ste 202
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Melanie Cronin, RNFamily Nurse Practitioner1861238974
Verify Linus Clark Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 3015290Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average internal medicine physician in 2024
276 Medicare Part D claims for 74 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Metoprolol Succinate26 claims
- Brilinta22 claims
- Eliquis22 claims
- Atorvastatin Calcium20 claims
- Ezetimibe17 claims
- Amlodipine Besylate16 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.
Linus Clark Williams among 6,825 internal medicine physician records in Massachusetts
Linus Clark Williams, MD, PHD is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 95% of them.
- NPI issued2023 · 95% of these records are older, 3% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2026 · 64% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
144 internal medicine physician records list a practice address in Burlington
They are 144 of the 2,620 NPPES records with a practice address in Burlington, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Burlington → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Joshua Berkowitz, M.D.Burlington, MA 018031891802633
- Michael Britt, MD IDBurlington, MA 018031831186071
- Betsey Crawford, M.D.Burlington, MA 018031629174859
- Stephen Dong, M.D.Burlington, MA 018031437122470
- Jeffrey Gorvine, M.D.Burlington, MA 018031376553636
- Richard Kalish, MDBurlington, MA 018031154394955
- Sheri Keitz, MD, PHDBurlington, MA 018031336179514
- David Longworth, MDBurlington, MA 018031811092869
Common questions
What is Linus Clark Williams, MD, PHD's NPI number?
Linus Clark Williams, MD, PHD's National Provider Identifier (NPI) is 1811671522, issued on Jun 13, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Linus Clark Williams, MD, PHD located?
The NPPES record lists a practice address at 67 S Bedford St Ste 202, Burlington, MA, 01803. Phone: (781) 744-7000. Providers update this record themselves, so call before visiting.
How can I verify Linus Clark Williams, MD, PHD's license?
NPPES lists Massachusetts license number 3015290, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Linus Clark Williams, MD, PHD prescribe under Medicare Part D?
In 2024, Linus Clark Williams, MD, PHD had 276 Medicare Part D claims for 74 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.