SARAH K MAY M.D.
NPI 1801879002
Internal Medicine - Hematology & Oncology in Weymouth, MA
About Sarah K May M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SARAH K MAY M.D. (NPI 1801879002) is an individual hematology & oncology provider in Weymouth, Massachusetts, licensed in Massachusetts (78169) and active in the NPI registry since November 2005. She is enrolled in Medicare PECOS, is affiliated with South Shore Hospital, and is a graduate of Tufts University School Of Medicine (1991).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 8
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
Sarah K May 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 Sarah May reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1851333686 (Massachusetts)
- 531 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 4
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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
South Shore Hospital
Acute Care Hospitals · South Weymouth, MABrigham And Women's Hospital
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02189 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.
WEYMOUTH, MA 02189
WEYMOUTH, MA 02189
WEYMOUTH, MA 02189
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 Sarah May's NPI number?
The NPI number for Sarah May is 1801879002. It was assigned to this individual provider in the NPPES registry on November 22, 2005.
Where is Sarah May located?
Sarah May practices at 51 Performance Dr Suite 110, Weymouth, MA 02189. The listed phone number is (781) 337-9091.
What is Sarah May's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Sarah May enrolled in Medicare?
Yes. Sarah May 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 Sarah May's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sarah May reassigns Medicare benefits to Dana-Farber Cancer Institute, Inc. (Boston, MA). 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 Sarah May's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Sarah May affiliated with any hospitals?
According to CMS data, Sarah May is affiliated with South Shore Hospital and Brigham And Women's Hospital.
When was this NPI record last updated?
The NPPES record for Sarah May was last updated on March 20, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Sarah K May, M.D. · NPI 1801879002
Hematology & Oncology physician in Weymouth, Massachusetts. Individual provider, active in the CMS NPPES registry since November 22, 2005.
## Identity
- **NPI:** 1801879002 (Entity type: Individual)
- **Enumerated:** November 22, 2005
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** 78169 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 51 PERFORMANCE DR, SUITE 110, Weymouth, MA 02189-3141
- **Phone:** (781) 337-9091 · **Fax:** (781) 337-9619
## 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:** Dana-Farber Cancer Institute, Inc. (NPI 1346433257, Boston, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Tufts University School Of Medicine, class of 1991
## Record status
- **NPPES last updated:** March 20, 2017
- **Other identifiers:** Other B21167801 (MA); Other 14354 (MA); Medicare ID-Type Unspecified A23763 (MA); and 5 more
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Source: [NPI Profile](https://npiprofile.com/npi/1801879002) · Data from the CMS NPPES public registry.