Margaret-Mary Williams, MD
Internal Medicine Physician · Brockton, MA
Margaret-Mary Williams, MD is an internal medicine physician with a practice address in Brockton, Massachusetts, and NPI 1992792055, issued on Oct 4, 2005. Check the license (Massachusetts 71259, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Margaret-Mary Williams
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 71259 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1 Pearl St, Brockton, MA 02301
- Phone
- (508) 897-6200
- Enumerated
- Oct 4, 2005
- Record last updated
- Jan 21, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (508) 897-6321
- Medicaid ID
- 3074749 MA
- Medicare enrollment
- Enrolled (PECOS I20050421001410); accepts Medicare assignment
- Medical or professional school
- Albany Medical College Of Union University, 1987
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 1 Pearl St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jolly Abeskheron, M.D.Internal Medicine Physician1033476627
- Peter Augustinos, M.D.Family Medicine Physician1518936327
- Frank Breslin, MDPulmonary Disease Physician1720072127
- Jocelyn Bresnahan, NPAdult Health Nurse Practitioner1982685095
- Shawna Bucchere, PA-CSurgical Physician Assistant1588096655
- Jane Butlin, MDInternal Medicine Physician1013990050
Verify Margaret-Mary 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 71259Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6% more Medicare Part D claims than the average internal medicine physician in 2024
3,352 Medicare Part D claims for 226 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 65 claims were for opioids.
Most prescribed
- Atorvastatin Calcium280 claims
- Lisinopril199 claims
- Levothyroxine Sodium168 claims
- Amlodipine Besylate154 claims
- Omeprazole123 claims
- Hydrochlorothiazide98 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
- Revere Medical OF Massachusetts PCBrockton, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margaret-Mary Williams among 6,825 internal medicine physician records in Massachusetts
Margaret-Mary Williams, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 88% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1987 · median 2004 among the 4,103 with a school on file
- Record last updated2011 · 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).
111 internal medicine physician records list a practice address in Brockton
They are 111 of the 4,287 NPPES records with a practice address in Brockton, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Brockton → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Dino Constantinou, MDBrockton, MA 023011770578932
- Paul Coutu, MDBrockton, MA 023011114911757
- Mark Dichter, MDBrockton, MA 023011275527020
- Christopher Johnson, MDBrockton, MA 023011194711523
- Joseph Kagan, MDBrockton, MA 023011851388029
- Roger Kligler, MDBrockton, MA 023011578559985
- Benjamin Lightfoot, MDBrockton, MA 023011497749584
- Richard Lubens, MDBrockton, MA 023011730174392
Common questions
What is Margaret-Mary Williams, MD's NPI number?
Margaret-Mary Williams, MD's National Provider Identifier (NPI) is 1992792055, issued on Oct 4, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Margaret-Mary Williams, MD located?
The NPPES record lists a practice address at 1 Pearl St, Brockton, MA, 02301. Phone: (508) 897-6200. Providers update this record themselves, so call before visiting.
How can I verify Margaret-Mary Williams, MD's license?
NPPES lists Massachusetts license number 71259, 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 Margaret-Mary Williams, MD prescribe under Medicare Part D?
In 2024, Margaret-Mary Williams, MD had 3,352 Medicare Part D claims for 226 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.