Clara G. Weinstock, D.O.
Internal Medicine Physician · Springfield, MA
Clara G. Weinstock, D.O. is an internal medicine physician with a practice address in Springfield, Massachusetts, and NPI 1699110197, issued on May 9, 2013. Check the license (Massachusetts 268911, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Clara G. Weinstock
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 268911 MA
055257 CT
Self-reported in NPPES; status is on the state search - Practice location
- 759 Chestnut St, Springfield, MA 01107
- Phone
- (413) 794-4320
- Enumerated
- May 9, 2013
- Record last updated
- Sep 28, 2022
- Fax
- (413) 794-1767
- Medicare enrollment
- Enrolled (PECOS I20160920002250); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 759 Chestnut St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Clara G. Weinstock in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 268911Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
55% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,419 Medicare Part D claims for 241 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium87 claims
- Amlodipine Besylate85 claims
- Rosuvastatin Calcium69 claims
- Losartan Potassium58 claims
- Lisinopril42 claims
- Pantoprazole Sodium41 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 79.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- University OF Connecticut Health CenterFarmington, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Clara G. Weinstock among 6,825 internal medicine physician records in Massachusetts
Clara G. Weinstock, D.O. 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 2013, is newer than 70% of them.
- NPI issued2013 · 70% of these records are older, 28% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2013 · median 2004 among the 4,103 with a school on file
- Record last updated2022 · 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).
282 internal medicine physician records list a practice address in Springfield
They are 282 of the 8,553 NPPES records with a practice address in Springfield, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Springfield → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ronald Berger, MDSpringfield, MA 011071649263286
- Greta Boynton, M.D.Springfield, MA 011071801854773
- Elizabeth Eagleson, M.D.Springfield, MA 011071538139993
- John Egelhofer, MDSpringfield, MA 011071972595775
- David Fanti, MDSpringfield, MA 011071396737904
- Philip Gaziano, MDSpringfield, MA 011071043275001
- Howard Goldberg, M.D.Springfield, MA 011071457331050
- James Hession, MDSpringfield, MA 011071588656193
Common questions
What is Clara G. Weinstock, D.O.'s NPI number?
Clara G. Weinstock, D.O.'s National Provider Identifier (NPI) is 1699110197, issued on May 9, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Clara G. Weinstock, D.O. located?
The NPPES record lists a practice address at 759 Chestnut St, Springfield, MA, 01107. Phone: (413) 794-4320. Providers update this record themselves, so call before visiting.
How can I verify Clara G. Weinstock, D.O.'s license?
NPPES lists Massachusetts license number 268911, 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 Clara G. Weinstock, D.O. prescribe under Medicare Part D?
In 2024, Clara G. Weinstock, D.O. had 1,419 Medicare Part D claims for 241 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Clara G. Weinstock, D.O.'s MIPS final score?
The 2023 MIPS final score is 79.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.