Margret W. Chang, M.D.
Internal Medicine Physician · Uxbridge, MA
Margret W. Chang, M.D. is an internal medicine physician with a practice address in Uxbridge, Massachusetts, and NPI 1902124282, issued on May 11, 2010. Check the license (Massachusetts 258551, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Margret W. Chang
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 258551 MA
Self-reported in NPPES; status is on the state search - Practice location
- 281 E Hartford Ave, Uxbridge, MA 01569
- Phone
- (508) 278-5573
- Enumerated
- May 11, 2010
- Record last updated
- Mar 12, 2025
- Fax
- (508) 278-7142
- Medicare enrollment
- Enrolled (PECOS I20140904000129); accepts Medicare assignment
- 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 281 E Hartford Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Pamela Baggeroer, M.D.Internal Medicine Physician1942262324
- Christopher Bilodeau, NPNurse Practitioner1942274287
- Nicolina Cordaro, M.D.Pediatrics Physician1861454548
- Christina Cronin, LICSWClinical Social Worker1194039842
- Peter Dain, M.D.Internal Medicine Physician1043275902
- Michelle Dalal, M.D.Pediatrics Physician1407812431
Verify Margret W. Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 258551Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
10% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,863 Medicare Part D claims for 179 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 260 claims were for opioids.
Most prescribed
- Oxycodone Hcl140 claims
- Atorvastatin Calcium137 claims
- Omeprazole119 claims
- Lisinopril102 claims
- Amlodipine Besylate82 claims
- Gabapentin69 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.
Industry payments in 2024: $14.64
1 payment: food and beverage; the largest payer was Cleerly, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Umass Memorial Medical Group IncUxbridge, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margret W. Chang among 6,825 internal medicine physician records in Massachusetts
Margret W. Chang, M.D. 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 2010, is newer than 63% of them.
- NPI issued2010 · 63% of these records are older, 35% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2010 · median 2004 among the 4,103 with a school on file
- Record last updated2025 · 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).
13 internal medicine physician records list a practice address in Uxbridge
They are 13 of the 139 NPPES records with a practice address in Uxbridge, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Uxbridge → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Pamela Baggeroer, M.D.Uxbridge, MA 015691942262324
- Peter Dain, M.D.Uxbridge, MA 015691043275902
- Thi Hong Van Do, M.D.Uxbridge, MA 015691255718318
- Eric Matthews, D.O.Uxbridge, MA 015691275730368
- Maria Patricia Miranda, M.D.Uxbridge, MA 015691952622615
- William Muller, M.D.Uxbridge, MA 015691891758090
- Chiaki Nakata, M.D.Uxbridge, MA 015691174055347
- Dennis Pannullo, M.D.Uxbridge, MA 015691114948643
Common questions
What is Margret W. Chang, M.D.'s NPI number?
Margret W. Chang, M.D.'s National Provider Identifier (NPI) is 1902124282, issued on May 11, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Margret W. Chang, M.D. located?
The NPPES record lists a practice address at 281 E Hartford Ave, Uxbridge, MA, 01569. Phone: (508) 278-5573. Providers update this record themselves, so call before visiting.
How can I verify Margret W. Chang, M.D.'s license?
NPPES lists Massachusetts license number 258551, 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 Margret W. Chang, M.D. prescribe under Medicare Part D?
In 2024, Margret W. Chang, M.D. had 2,863 Medicare Part D claims for 179 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.