PETER W GREENWALD M.D.
NPI 1255481164
Emergency Medicine in Pittsfield, MA
About Peter W Greenwald M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
PETER W GREENWALD M.D. (NPI 1255481164) is an individual emergency medicine provider in Pittsfield, Massachusetts, licensed in Massachusetts (209826) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS and is a graduate of State University Of New York Downstate Medical Center (1997).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Peter W Greenwald M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Peter Greenwald reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
New York, NY 10021
- Reassigned Medicare billing, New York enrollment
- 226 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01201 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PITTSFIELD, MA 01201
PITTSFIELD, MA 01201
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Peter Greenwald's NPI number?
The NPI number for Peter Greenwald is 1255481164. It was assigned to this individual provider in the NPPES registry on January 11, 2007.
Where is Peter Greenwald located?
Peter Greenwald practices at 725 North St Berkshire Medical Center Emergency Dept, Pittsfield, MA 01201. The listed phone number is (413) 447-2000.
What is Peter Greenwald's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Peter Greenwald enrolled in Medicare?
Yes. Peter Greenwald is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Peter Greenwald's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Peter Greenwald reassigns Medicare benefits to Weill Medical College Of Cornell (New York, NY). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Peter Greenwald's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Peter Greenwald was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Peter W Greenwald, M.D. · NPI 1255481164
Emergency Medicine physician in Pittsfield, Massachusetts. Individual provider, active in the CMS NPPES registry since January 11, 2007.
## Identity
- **NPI:** 1255481164 (Entity type: Individual)
- **Enumerated:** January 11, 2007
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 209826 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 725 NORTH ST, BERKSHIRE MEDICAL CENTER EMERGENCY DEPT, Pittsfield, MA 01201-4109
- **Phone:** (413) 447-2000 · **Fax:** (413) 447-2175
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Weill Medical College Of Cornell (NPI 1245355270, New York, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** State University Of New York Downstate Medical Center, class of 1997
## Record status
- **NPPES last updated:** July 8, 2007
- **Other identifiers:** Medicare UPIN H43482; Medicare ID-Type Unspecified 67Q691 (NY)
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Source: [NPI Profile](https://npiprofile.com/npi/1255481164) · Data from the CMS NPPES public registry.