DR. TAREK HASSAAN MOUHIEDDINE MD
NPI 1831658731
Internal Medicine - Medical Oncology in Boston, MA
About Dr. Tarek Hassaan Mouhieddine Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. TAREK HASSAAN MOUHIEDDINE MD (NPI 1831658731) is an individual medical oncology provider in Boston, Massachusetts, licensed in Massachusetts (1023488) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of Other (2016).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 2
Group Practice 1
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
Dr. Tarek Hassaan Mouhieddine 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 Reassignment
Medicare enrollment records show Tarek Mouhieddine reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1346433257 (Massachusetts)
- 1,026 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Massachusetts General Hospital
Acute Care Hospitals · Boston, MABrigham And Women's Hospital
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
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 Tarek Mouhieddine's NPI number?
The NPI number for Tarek Mouhieddine is 1831658731. It was assigned to this individual provider in the NPPES registry on March 19, 2019.
Where is Tarek Mouhieddine located?
Tarek Mouhieddine practices at 450 Brookline Ave, Boston, MA 02215. The listed phone number is (617) 632-3000.
What is Tarek Mouhieddine's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.
Is Tarek Mouhieddine enrolled in Medicare?
Yes. Tarek Mouhieddine 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 Tarek Mouhieddine's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tarek Mouhieddine 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 Tarek Mouhieddine's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Tarek Mouhieddine accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Tarek Mouhieddine 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 Tarek Mouhieddine affiliated with any hospitals?
According to CMS data, Tarek Mouhieddine is affiliated with Massachusetts General Hospital and Brigham And Women's Hospital.
When was this NPI record last updated?
The NPPES record for Tarek Mouhieddine was last updated on May 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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. Tarek Hassaan Mouhieddine, MD · NPI 1831658731
Medical Oncology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since March 19, 2019.
## Identity
- **NPI:** 1831658731 (Entity type: Individual)
- **Enumerated:** March 19, 2019
- **Primary specialty:** Internal Medicine - Medical Oncology · taxonomy 207RX0202X
- **State license:** 1023488 (Massachusetts)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 450 BROOKLINE AVE, Boston, MA 02215-5450
- **Phone:** (617) 632-3000 · **Fax:** (617) 632-6624
## 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 1851333686, Boston, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** May 20, 2026
- **Other identifiers:** Other 310698 (NY); Other 1023488 (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1831658731) · Data from the CMS NPPES public registry.