SINA M. MOSTAGHIMI MD
NPI 1194256776
Emergency Medicine in Boston, MA
About Sina M. Mostaghimi Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SINA M. MOSTAGHIMI MD (NPI 1194256776) is an individual emergency medicine provider in Boston, Massachusetts, licensed in Massachusetts (286667) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 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
Sina M. Mostaghimi 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
5Medicare enrollment records show Sina Mostaghimi reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 478 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 clinicians in this Medicare group
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 4,574 clinicians in this Medicare group
Oak Bluffs, MA 02557
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1194866210 (Massachusetts)
- 184 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 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Massachusetts General Hospital
Acute Care Hospitals · Boston, MAMassachusetts Eye And Ear Infirmary -
Acute Care Hospitals · Boston, MABrigham And Women's Hospital
Acute Care Hospitals · Boston, MAMartha's Vineyard Hospital Inc
Critical Access Hospitals · Oak Bluffs, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02114 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 02114
BOSTON, MA 02114
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 Sina Mostaghimi's NPI number?
The NPI number for Sina Mostaghimi is 1194256776. It was assigned to this individual provider in the NPPES registry on March 24, 2017.
Where is Sina Mostaghimi located?
Sina Mostaghimi practices at 243 Charles St, Boston, MA 02114. The listed phone number is (617) 573-3431.
What is Sina Mostaghimi's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Sina Mostaghimi enrolled in Medicare?
Yes. Sina Mostaghimi 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 Sina Mostaghimi's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sina Mostaghimi reassigns Medicare benefits to 5 organizations: Massachusetts Eye And Ear Associates, Inc. (Boston, MA), The General Hospital Corporation (Boston, MA), Massachusetts General Physicians Organization Inc (Boston, MA), Brigham & Womens Physicians Organization Inc (Boston, MA) and Martha's Vineyard Hospital, Inc. (Oak Bluffs, 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 Sina Mostaghimi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Sina Mostaghimi accept?
Health plans from Taro Health and WellSense Health Plan list Sina Mostaghimi 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 Sina Mostaghimi affiliated with any hospitals?
According to CMS data, Sina Mostaghimi is affiliated with Massachusetts General Hospital, Massachusetts Eye And Ear Infirmary -, Brigham And Women's Hospital and Martha's Vineyard Hospital Inc.
When was this NPI record last updated?
The NPPES record for Sina Mostaghimi was last updated on February 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Sina M. Mostaghimi, MD · NPI 1194256776
Emergency Medicine physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since March 24, 2017.
## Identity
- **NPI:** 1194256776 (Entity type: Individual)
- **Enumerated:** March 24, 2017
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 286667 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 243 CHARLES ST, Boston, MA 02114-3002
- **Phone:** (617) 573-3431
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Massachusetts Eye And Ear Associates, Inc. (NPI 1932574332, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA); Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); Brigham & Womens Physicians Organization Inc (NPI 1033535497, Boston, MA); Martha's Vineyard Hospital, Inc. (NPI 1134206386, Oak Bluffs, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Virginia Commonwealth University, School Of Medicine, class of 2017
## Record status
- **NPPES last updated:** February 5, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1194256776) · Data from the CMS NPPES public registry.