Benjamin S. Grimmnitz, MD
Emergency Medicine Physician · Boston, MA
Benjamin S. Grimmnitz, MD is an emergency medicine physician with a practice address in Boston, Massachusetts, and NPI 1962745539, issued on Apr 2, 2013. Check the license (Massachusetts 256208, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Benjamin S. Grimmnitz
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 256208 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1 Boston Medical Ctr PL, Boston, MA 02118
- Phone
- (617) 414-4929
- Enumerated
- Apr 2, 2013
- Record last updated
- Jul 18, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20180119001425); accepts Medicare assignment
- Medical or professional school
- Icahn School Of Medicine At Mount Sinai, 2013
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,829 in Massachusetts → Look up another NPI →
Also registered at 1 Boston Medical Ctr PL
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Tara AdyanthayaMental Health Counselor1053998419
- Shuchi AgarwalStudent in an Organized Health Care Education/Training Program1063701753
- Christina AgudeloStudent in an Organized Health Care Education/Training Program1699423772
- Priscilla AguilarStudent in an Organized Health Care Education/Training Program1033838792
Verify Benjamin S. Grimmnitz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 256208Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% fewer Medicare Part D claims than the average emergency medicine physician in 2024
162 Medicare Part D claims for 117 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Ondansetron Odt18 claims
- Prednisone11 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): 99.5 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
- Merrimack Valley Emergency Associates, Inc.Lowell, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Benjamin S. Grimmnitz among 1,829 emergency medicine physician records in Massachusetts
Benjamin S. Grimmnitz, MD is one of 1,829 emergency medicine physician records with a practice address in Massachusetts. 82% 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 65% of them.
- NPI issued2013 · 65% of these records are older, 33% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2013 · median 2011 among the 1,200 with a school on file
- Record last updated2016 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
543 emergency medicine physician records list a practice address in Boston
They are 543 of the 41,865 NPPES records with a practice address in Boston, and 1,829 emergency medicine physician records in Massachusetts.
All 1,829 in Massachusetts → Every provider in Boston → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Evan Berg, MDBoston, MA 021181982692596
- Edward Bernstein, MDBoston, MA 021181568434926
- Andreas Dewitz, MDBoston, MA 021181740267434
- Kathryn Dyer, MDBoston, MA 021181851363048
- James Feldman, MDBoston, MA 021181801868682
- Jerrilyn Jones, MDBoston, MA 021181467435396
- Joseph Kahn, M.D.Boston, MA 021181144293572
- Ricky Kue, M.D., M.P.H.Boston, MA 021181134102395
Common questions
What is Benjamin S. Grimmnitz, MD's NPI number?
Benjamin S. Grimmnitz, MD's National Provider Identifier (NPI) is 1962745539, issued on Apr 2, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Benjamin S. Grimmnitz, MD located?
The NPPES record lists a practice address at 1 Boston Medical Ctr PL, Boston, MA, 02118. Phone: (617) 414-4929. Providers update this record themselves, so call before visiting.
How can I verify Benjamin S. Grimmnitz, MD's license?
NPPES lists Massachusetts license number 256208, 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 Benjamin S. Grimmnitz, MD prescribe under Medicare Part D?
In 2024, Benjamin S. Grimmnitz, MD had 162 Medicare Part D claims for 117 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Benjamin S. Grimmnitz, MD's MIPS final score?
The 2023 MIPS final score is 99.5 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.