SAHAR NISSIM
NPI 1396944401
Internal Medicine - Gastroenterology in Boston, MA
About Sahar Nissim NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SAHAR NISSIM (NPI 1396944401) is an individual gastroenterology provider in Boston, Massachusetts, licensed in Massachusetts (258952) and active in the NPI registry since July 2007. He is enrolled in Medicare PECOS, is affiliated with Brigham And Women's Hospital, and is a graduate of Harvard Medical School (2007).
NPPES Registry Identity
Specialties & Licenses 2
Accepted Insurance
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
Sahar Nissim 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 Sahar Nissim reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 4,574 clinicians in this Medicare group
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 3
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Brigham And Women's Hospital
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02115 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 02115
BOSTON, MA 02115
BOSTON, MA 02115
BOSTON, MA 02115
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 Sahar Nissim's NPI number?
The NPI number for Sahar Nissim is 1396944401. It was assigned to this individual provider in the NPPES registry on July 18, 2007.
Where is Sahar Nissim located?
Sahar Nissim practices at 75 Francis St, Boston, MA 02115. The listed phone number is (617) 525-6841.
What is Sahar Nissim's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Sahar Nissim enrolled in Medicare?
Yes. Sahar Nissim 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 Sahar Nissim's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sahar Nissim reassigns Medicare benefits to 2 organizations: Brigham & Womens Physicians Organization Inc (Boston, MA) and Dana-Farber Cancer Institute, 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 Sahar Nissim's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Sahar Nissim accept?
Health plans from Anthem Blue Cross and Blue Shield list Sahar Nissim 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 Sahar Nissim affiliated with any hospitals?
According to CMS data, Sahar Nissim is affiliated with Brigham And Women's Hospital.
When was this NPI record last updated?
The NPPES record for Sahar Nissim was last updated on August 25, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Sahar Nissim · NPI 1396944401
Gastroenterology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since July 18, 2007.
## Identity
- **NPI:** 1396944401 (Entity type: Individual)
- **Enumerated:** July 18, 2007
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 258952 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 75 FRANCIS ST, Boston, MA 02115-6110
- **Phone:** (617) 525-6841
## 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): Brigham & Womens Physicians Organization Inc (NPI 1033535497, Boston, MA); Dana-Farber Cancer Institute, Inc. (NPI 1346433257, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 2007
## Record status
- **NPPES last updated:** August 25, 2014
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Source: [NPI Profile](https://npiprofile.com/npi/1396944401) · Data from the CMS NPPES public registry.