Robert Patrick Williamson, MD
Internal Medicine Physician · Wilmington, MA
Robert Patrick Williamson, MD is an internal medicine physician with a practice address in Wilmington, Massachusetts, and NPI 1821068305, issued on Jan 25, 2006. Check the license (Massachusetts 51661, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Robert Patrick Williamson
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 51661 MA
Self-reported in NPPES; status is on the state search - Practice location
- 500 Salem Street, Wilmington, MA 01887
- Phone
- (978) 988-6000
- Enumerated
- Jan 25, 2006
- Record last updated
- Mar 23, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (781) 396-1620
- Medicaid ID
- 6192696 MA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 500 Salem Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Traci Alberti, NPFamily Nurse Practitioner1992778815
- Laura Armstrong, N.P.Nurse Practitioner1619293230
- Alison Curcio, MDEmergency Medicine Physician1689668568
- Edward Curcio, MDEmergency Medicine Physician1003800475
- Kristen Ghergurovich, M.D.Internal Medicine Physician1386626125
- Neeti Jha, M.D.Internal Medicine Physician1184843559
Verify Robert Patrick Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 51661Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average internal medicine physician in 2024
15 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Robert Patrick Williamson among 6,825 internal medicine physician records in Massachusetts
Robert Patrick Williamson, MD 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 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2017 · 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).
15 internal medicine physician records list a practice address in Wilmington
They are 15 of the 443 NPPES records with a practice address in Wilmington, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Wilmington → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Josephine Albano, MDWilmington, MA 018871215991526
- Joseph Costagliola, M.D.Wilmington, MA 018871972507242
- Kristen Ghergurovich, M.D.Wilmington, MA 018871386626125
- Theodore Guldemond, M.D.Wilmington, MA 018871598721524
- Neeti Jha, M.D.Wilmington, MA 018871184843559
- Janet Mayne, D.N.P.Wilmington, MA 018871720061161
- Lillian Moy-Yee, M.D.Wilmington, MA 018871730162181
- Loubna Rabbouh, MDWilmington, MA 018871689269185
Common questions
What is Robert Patrick Williamson, MD's NPI number?
Robert Patrick Williamson, MD's National Provider Identifier (NPI) is 1821068305, issued on Jan 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Patrick Williamson, MD located?
The NPPES record lists a practice address at 500 Salem Street, Wilmington, MA, 01887. Phone: (978) 988-6000. Providers update this record themselves, so call before visiting.
How can I verify Robert Patrick Williamson, MD's license?
NPPES lists Massachusetts license number 51661, 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 Robert Patrick Williamson, MD prescribe under Medicare Part D?
In 2024, Robert Patrick Williamson, MD had 15 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.