DR. DEREK ALEXANDER MUMAW MD
NPI 1013532449
Radiology - Radiation Oncology in Dartmouth, MA
About Dr. Derek Alexander Mumaw Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DEREK ALEXANDER MUMAW MD (NPI 1013532449) is an individual radiation oncology provider in Dartmouth, Massachusetts, licensed in Massachusetts (1023968) and active in the NPI registry since June 2020. He is enrolled in Medicare PECOS, is affiliated with Saint Anne's Hospital, and maintains 4 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 4
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Derek Alexander Mumaw Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
5Medicare enrollment records show Derek Mumaw reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Fall River, MA 02721
- Reassigned Medicare billing, Massachusetts enrollment
- 24 clinicians in this Medicare group
Riverside, RI 02915
- Reassigned Medicare billing, Rhode Island enrollment
- 1,372 clinicians in this Medicare group
Taunton, MA 02780
- Reassigned Medicare billing, Massachusetts enrollment
- 547 clinicians in this Medicare group
Providence, RI 02903
- Reassigned Medicare billing, Rhode Island enrollment
- 14 clinicians in this Medicare group
Providence, RI 02903
- Reassigned Medicare billing, Rhode Island enrollment
- 182 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.
Saint Anne's Hospital
Acute Care Hospitals · Fall River, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02747 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 10
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
DARTMOUTH, MA 02747
DARTMOUTH, MA 02747
DARTMOUTH, MA 02747
NORTH DARTMOUTH, MA 02747
NORTH DARTMOUTH, MA 02747
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 Derek Mumaw's NPI number?
The NPI number for Derek Mumaw is 1013532449. It was assigned to this individual provider in the NPPES registry on June 11, 2020.
Where is Derek Mumaw located?
Derek Mumaw practices at 537 Faunce Corner Rd, Dartmouth, MA 02747. The listed phone number is (508) 689-3100.
What is Derek Mumaw's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.
Is Derek Mumaw enrolled in Medicare?
Yes. Derek Mumaw is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Derek Mumaw's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Derek Mumaw reassigns Medicare benefits to 5 organizations: Lifespan Of Massachusetts - Fall River Inc (Fall River, MA), Lifespan Physician Group, Inc. (Riverside, RI), Lifespan Physician Group Of Massachusetts Inc (Taunton, MA), Radiosurgery Center Of Rhode Island LLC (Providence, RI) and Rhode Island Hospital (Providence, RI). 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 Derek Mumaw's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Derek Mumaw accept?
Health plans from Anthem Blue Cross and Blue Shield list Derek Mumaw as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Derek Mumaw affiliated with any hospitals?
According to CMS data, Derek Mumaw is affiliated with Saint Anne's Hospital.
When was this NPI record last updated?
The NPPES record for Derek Mumaw was last updated on July 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.
# Dr. Derek Alexander Mumaw, MD · NPI 1013532449
Radiation Oncology physician in Dartmouth, Massachusetts. Individual provider, active in the CMS NPPES registry since June 11, 2020.
## Identity
- **NPI:** 1013532449 (Entity type: Individual)
- **Enumerated:** June 11, 2020
- **Primary specialty:** Radiology - Radiation Oncology · taxonomy 2085R0001X
- **State license:** 1023968 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 537 FAUNCE CORNER RD, Dartmouth, MA 02747-1242
- **Phone:** (508) 689-3100
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Lifespan Of Massachusetts - Fall River Inc (NPI 1972330165, Fall River, MA); Lifespan Physician Group, Inc. (NPI 1215899869, Riverside, RI); Lifespan Physician Group Of Massachusetts Inc (NPI 1235957713, Taunton, MA); Radiosurgery Center Of Rhode Island LLC (NPI 1578726261, Providence, RI); Rhode Island Hospital (NPI 1396849782, Providence, RI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Hofstra North Shore - Lij School Of Medicine, class of 2020
## Record status
- **NPPES last updated:** July 27, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1013532449) · Data from the CMS NPPES public registry.