SANDRA MASON M.D.
NPI 1891753273
Obstetrics & Gynecology in Boston, MA
About Sandra Mason M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SANDRA MASON M.D. (NPI 1891753273) is an individual obstetrics & gynecology provider in Boston, Massachusetts, licensed in Massachusetts (207645) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS, is affiliated with Beth Israel Deaconess Medical Center, and is a graduate of Harvard Medical School (1995).
NPPES Registry Identity
Specialties & Licenses
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
Sandra Mason 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
2Medicare enrollment records show Sandra Mason reassigns Medicare billing to 2 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
- Also billed through NPI 1194765438 (Massachusetts)
- 161 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 1,477 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.
Beth Israel Deaconess Medical Center
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02215 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02215
BOSTON, MA 02215
BOSTON, MA 02215
BOSTON, MA 02215
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 Sandra Mason's NPI number?
The NPI number for Sandra Mason is 1891753273. It was assigned to this individual provider in the NPPES registry on May 3, 2006.
Where is Sandra Mason located?
Sandra Mason practices at 330 Brookline Ave Bidmc / Ob/Gyn Ks 206, Boston, MA 02215. The listed phone number is (617) 667-2949.
What is Sandra Mason's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Sandra Mason enrolled in Medicare?
Yes. Sandra Mason 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 Sandra Mason's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sandra Mason reassigns Medicare benefits to 2 organizations: Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (Boston, MA) and Beth Israel Deaconess Medical Center, 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 Sandra Mason's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Sandra Mason affiliated with any hospitals?
According to CMS data, Sandra Mason is affiliated with Beth Israel Deaconess Medical Center.
When was this NPI record last updated?
The NPPES record for Sandra Mason was last updated on April 6, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Sandra Mason, M.D. · NPI 1891753273
Obstetrics & Gynecology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since May 3, 2006.
## Identity
- **NPI:** 1891753273 (Entity type: Individual)
- **Enumerated:** May 3, 2006
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 207645 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 330 BROOKLINE AVE, BIDMC / OB/GYN KS 206, Boston, MA 02215-5400
- **Phone:** (617) 667-2949
## 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): Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (NPI 1518908136, Boston, MA); Beth Israel Deaconess Medical Center, Inc. (NPI 1548202641, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 1995
## Record status
- **NPPES last updated:** April 6, 2011
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Source: [NPI Profile](https://npiprofile.com/npi/1891753273) · Data from the CMS NPPES public registry.