DR. MAY RIAD MD
NPI 1710355706
Internal Medicine in Watertown, MA
About Dr. May Riad Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MAY RIAD MD (NPI 1710355706) is an individual internal medicine provider in Watertown, Massachusetts, licensed in Massachusetts (277268) and active in the NPI registry since September 2015. She is enrolled in Medicare PECOS, is affiliated with Boston Medical Center, and is a graduate of Other (2018).
NPPES Registry Identity
Specialties & Licenses 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
Dr. May Riad Md 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
2Medicare enrollment records show May Riad reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Newton, MA 02462
- Reassigned Medicare billing, Massachusetts enrollment
- 992 clinicians in this Medicare group
Boston, MA 02109
- Reassigned Medicare billing, Massachusetts enrollment
- 350 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 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Boston Medical Center
Acute Care Hospitals · Boston, MAMassachusetts General Hospital
Acute Care Hospitals · Boston, MANewton-Wellesley Hospital
Acute Care Hospitals · Newton, MABrigham And Women's Hospital
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02472 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 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WATERTOWN, MA 02472
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 May Riad's NPI number?
The NPI number for May Riad is 1710355706. It was assigned to this individual provider in the NPPES registry on September 8, 2015.
Where is May Riad located?
May Riad practices at 1 Mount Auburn St, Watertown, MA 02472. The listed phone number is (781) 653-0100.
What is May Riad's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is May Riad enrolled in Medicare?
Yes. May Riad 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 May Riad's services?
According to the CMS Revalidation Reassignment List (October 2026 release), May Riad reassigns Medicare benefits to 2 organizations: Mass General Brigham Medical Group Suburban Massachusetts Inc (Newton, MA) and Mass General Brigham Community Physicians Inc. (Boston, 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 May Riad's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is May Riad affiliated with any hospitals?
According to CMS data, May Riad is affiliated with Boston Medical Center, Massachusetts General Hospital, Newton-Wellesley Hospital and Brigham And Women's Hospital.
When was this NPI record last updated?
The NPPES record for May Riad was last updated on June 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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. May Riad, MD · NPI 1710355706
Internal Medicine physician in Watertown, Massachusetts. Individual provider, active in the CMS NPPES registry since September 8, 2015.
## Identity
- **NPI:** 1710355706 (Entity type: Individual)
- **Enumerated:** September 8, 2015
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 277268 (Massachusetts)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1 MOUNT AUBURN ST, Watertown, MA 02472-3923
- **Phone:** (781) 653-0100
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Mass General Brigham Medical Group Suburban Massachusetts Inc (NPI 1538191218, Newton, MA); Mass General Brigham Community Physicians Inc. (NPI 1265094122, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2018
## Record status
- **NPPES last updated:** June 15, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1710355706) · Data from the CMS NPPES public registry.