NAZEM ATASSI MD
NPI 1467643585
Psychiatry & Neurology - Neurology in Boston, MA
About Nazem Atassi Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NAZEM ATASSI MD (NPI 1467643585) is an individual neurology provider in Boston, Massachusetts, licensed in Massachusetts (L-218268) and active in the NPI registry since August 2007. He is enrolled in Medicare PECOS and is a graduate of Other (2002).
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
Nazem Atassi 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 Nazem Atassi reassigns Medicare billing to 2 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
- 6,234 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 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.
Physician 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
BOSTON, MA 02114
BOSTON, MA 02114
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 Nazem Atassi's NPI number?
The NPI number for Nazem Atassi is 1467643585. It was assigned to this individual provider in the NPPES registry on August 5, 2007.
Where is Nazem Atassi located?
Nazem Atassi practices at 55 Fruit Street Massachusetts General Hospital, Boston, MA 02114. The listed phone number is (617) 643-0842.
What is Nazem Atassi's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.
Is Nazem Atassi enrolled in Medicare?
Yes. Nazem Atassi 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 Nazem Atassi's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nazem Atassi reassigns Medicare benefits to 2 organizations: The General Hospital Corporation (Boston, MA) and Massachusetts General Physicians Organization 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 Nazem Atassi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Nazem Atassi was last updated on August 5, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Nazem Atassi, MD · NPI 1467643585
Neurology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since August 5, 2007.
## Identity
- **NPI:** 1467643585 (Entity type: Individual)
- **Enumerated:** August 5, 2007
- **Primary specialty:** Psychiatry & Neurology - Neurology · taxonomy 2084N0400X
- **State license:** L-218268 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 55 FRUIT STREET, MASSACHUSETTS GENERAL HOSPITAL, Boston, MA 02114
- **Phone:** (617) 643-0842
## 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): The General Hospital Corporation (NPI 1023049236, Boston, MA); Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2002
## Record status
- **NPPES last updated:** August 5, 2007
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Source: [NPI Profile](https://npiprofile.com/npi/1467643585) · Data from the CMS NPPES public registry.