Peter W. Greenwald, M.D.
Emergency Medicine Physician · Pittsfield, MA
Peter W. Greenwald, M.D. is an emergency medicine physician with a practice address in Pittsfield, Massachusetts, and NPI 1255481164, issued on Jan 11, 2007. Check the license (Massachusetts 209826, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Peter W. Greenwald
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 209826 MA
Self-reported in NPPES; status is on the state search - Practice location
- 725 North St, Pittsfield, MA 01201
- Phone
- (413) 447-2000
- Enumerated
- Jan 11, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (413) 447-2175
- Medicare enrollment
- Enrolled (PECOS I20040408001402); accepts Medicare assignment
- Medical or professional school
- State University Of New York Downstate Medical Center, 1997
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,829 in Massachusetts → Look up another NPI →
Also registered at 725 North St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Erik Adler, D.O.Student in an Organized Health Care Education/Training Program1700468915
- Parinaz Afrashteh, MDStudent in an Organized Health Care Education/Training Program1609677715
- Deepak Agarwal, MDDiagnostic Radiology Physician1043265754
Verify Peter W. Greenwald in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 209826Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average emergency medicine physician in 2024
119 Medicare Part D claims for 55 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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 MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Weill Medical College OF CornellNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Peter W. Greenwald among 1,829 emergency medicine physician records in Massachusetts
Peter W. Greenwald, M.D. 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 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 51% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1997 · median 2011 among the 1,200 with a school on file
- Record last updated2007 · 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).
28 emergency medicine physician records list a practice address in Pittsfield
They are 28 of the 2,189 NPPES records with a practice address in Pittsfield, and 1,829 emergency medicine physician records in Massachusetts.
All 1,829 in Massachusetts → Every provider in Pittsfield → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Nancy Campbell, MDPittsfield, MA 012011275518243
- Michael Coyne, M.D.Pittsfield, MA 012011255345799
- Thomas Dourmashkin, M.D.Pittsfield, MA 012011114934486
- Ronald Hayden, M.D.Pittsfield, MA 012011447267612
- Michael McHugh, M.D.Pittsfield, MA 012011114985769
- Mark Nicoletti, M.D.Pittsfield, MA 012011427016013
- Valerie Nicoletti, M.D.Pittsfield, MA 012011902813587
- Linda Perry, M.D.Pittsfield, MA 012011154339703
Common questions
What is Peter W. Greenwald, M.D.'s NPI number?
Peter W. Greenwald, M.D.'s National Provider Identifier (NPI) is 1255481164, issued on Jan 11, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Peter W. Greenwald, M.D. located?
The NPPES record lists a practice address at 725 North St, Pittsfield, MA, 01201. Phone: (413) 447-2000. Providers update this record themselves, so call before visiting.
How can I verify Peter W. Greenwald, M.D.'s license?
NPPES lists Massachusetts license number 209826, 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 Peter W. Greenwald, M.D. prescribe under Medicare Part D?
In 2024, Peter W. Greenwald, M.D. had 119 Medicare Part D claims for 55 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Peter W. Greenwald, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 of 100. 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.