MICHAEL D WERTHEIMER M.D.
NPI 1265540975
Surgery - Surgical Oncology in Worcester, MA
About Michael D Wertheimer M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MICHAEL D WERTHEIMER M.D. (NPI 1265540975) is an individual surgical oncology provider in Worcester, Massachusetts, licensed in Massachusetts (34387) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, is affiliated with Cambridge Health Alliance, and is a graduate of Perelman School Of Med At The University Of Pennsylvania (1971).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
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
Michael D Wertheimer 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 Reassignments
3Medicare enrollment records show Michael Wertheimer reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 1,477 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 281 clinicians in this Medicare group
Cambridge, MA 02139
- Reassigned Medicare billing, Massachusetts enrollment
- 719 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Cambridge Health Alliance
Acute Care Hospitals · Cambridge, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01605 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Michael Wertheimer's NPI number?
The NPI number for Michael Wertheimer is 1265540975. It was assigned to this individual provider in the NPPES registry on August 25, 2006.
Where is Michael Wertheimer located?
Michael Wertheimer practices at Umass Memorial Health Care 119 Belmont Street, Worcester, MA 01605. The listed phone number is (508) 334-5132.
What is Michael Wertheimer's specialty?
The primary specialty registered for this NPI is Surgery, specializing in Surgical Oncology, with taxonomy code 2086X0206X.
Is Michael Wertheimer enrolled in Medicare?
Yes. Michael Wertheimer 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 organizations bill Medicare for Michael Wertheimer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Wertheimer reassigns Medicare benefits to 3 organizations: Beth Israel Deaconess Medical Center, Inc. (Boston, MA), Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (Boston, MA) and Cambridge Public Health Commission (Cambridge, MA). Each 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 Michael Wertheimer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Michael Wertheimer affiliated with any hospitals?
According to CMS data, Michael Wertheimer is affiliated with Cambridge Health Alliance.
When was this NPI record last updated?
The NPPES record for Michael Wertheimer was last updated on July 20, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Michael D Wertheimer, M.D. · NPI 1265540975
Surgical Oncology physician in Worcester, Massachusetts. Individual provider, active in the CMS NPPES registry since August 25, 2006.
## Identity
- **NPI:** 1265540975 (Entity type: Individual)
- **Enumerated:** August 25, 2006
- **Primary specialty:** Surgery - Surgical Oncology · taxonomy 2086X0206X
- **State license:** 34387 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** UMASS MEMORIAL HEALTH CARE, 119 BELMONT STREET, Worcester, MA 01605
- **Phone:** (508) 334-5132
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Beth Israel Deaconess Medical Center, Inc. (NPI 1548202641, Boston, MA); Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (NPI 1720037385, Boston, MA); Cambridge Public Health Commission (NPI 1487603585, Cambridge, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Perelman School Of Med At The University Of Pennsylvania, class of 1971
## Record status
- **NPPES last updated:** July 20, 2015
- **Other identifiers:** Medicare PIN HX4488 (MA)
---
Source: [NPI Profile](https://npiprofile.com/npi/1265540975) · Data from the CMS NPPES public registry.