David Matthew Stein, MD
Internal Medicine Physician · Westborough, MA
David Matthew Stein, MD is an internal medicine physician with a practice address in Westborough, Massachusetts, and NPI 1245729656, issued on May 2, 2018. Check the license (Massachusetts 285771, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- David Matthew Stein
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 285771 MA
Self-reported in NPPES; status is on the state search - Practice location
- 900 Union St, Westborough, MA 01581
- Phone
- (508) 871-0700
- Enumerated
- May 2, 2018
- Record last updated
- Aug 10, 2023
- Fax
- (508) 616-4411
- Medicaid ID
- 110135521A MA
- Medicare enrollment
- Enrolled (PECOS I20210611001970); accepts Medicare assignment
- Medical or professional school
- University Of Massachusetts Medical School, 2018
- 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 900 Union St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Leah Barker, NPWomen's Health Nurse Practitioner1780753061
- Allison Camacho, NPNurse Practitioner1184841736
- Michael Daley, MDPediatrics Physician1861469751
- Ann Marie Deangelis, M.D.Pediatrics Physician1477500106
- Natalie Dolan, PAPhysician Assistant1992206205
- Leah Doret, M.D.Family Medicine Physician1699781039
Verify David Matthew Stein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 285771Check 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% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,970 Medicare Part D claims for 428 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 103 claims were for opioids.
Most prescribed
- Atorvastatin Calcium240 claims
- Amlodipine Besylate133 claims
- Lisinopril130 claims
- Omeprazole90 claims
- Losartan Potassium78 claims
- Tamsulosin Hcl77 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: $66.85
4 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, 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
- Reliant Medical Group IncWestborough, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David Matthew Stein among 6,825 internal medicine physician records in Massachusetts
David Matthew Stein, 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 2018, is newer than 82% of them.
- NPI issued2018 · 82% of these records are older, 16% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2018 · median 2004 among the 4,103 with a school on file
- Record last updated2023 · 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).
27 internal medicine physician records list a practice address in Westborough
They are 27 of the 565 NPPES records with a practice address in Westborough, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Westborough → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Parmender Bagga, MDWestborough, MA 015811861478059
- Clifford Behmer, M.D.Westborough, MA 015811407839392
- Elisabeth Brewer, M.D.Westborough, MA 015811902853690
- Arthur Brewer, M.D.Westborough, MA 015811457360588
- Faiyaz Hakim, MDWestborough, MA 015811932113446
- Nandana Kansra, M.D.Westborough, MA 015811073564225
- Robert Klugman, M.D.Westborough, MA 015811740263417
- Shelley Kramer, MDWestborough, MA 015811649233495
Common questions
What is David Matthew Stein, MD's NPI number?
David Matthew Stein, MD's National Provider Identifier (NPI) is 1245729656, issued on May 2, 2018. An NPI identifies a provider in billing; it is not a license.
Where is David Matthew Stein, MD located?
The NPPES record lists a practice address at 900 Union St, Westborough, MA, 01581. Phone: (508) 871-0700. Providers update this record themselves, so call before visiting.
How can I verify David Matthew Stein, MD's license?
NPPES lists Massachusetts license number 285771, 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 David Matthew Stein, MD prescribe under Medicare Part D?
In 2024, David Matthew Stein, MD had 2,970 Medicare Part D claims for 428 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.