DR. STEVE G MASSAQUOI M.D., PH.D.
NPI 1811934813
Psychiatry & Neurology - Neurology in Boston, MA
About Dr. Steve G Massaquoi M.d., Ph.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. STEVE G MASSAQUOI M.D., PH.D. (NPI 1811934813) is an individual neurology provider in Boston, Massachusetts, licensed in Massachusetts (56107) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Northeast Hospital Corporation, and maintains a secondary practice location in Burlington.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 4
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. Steve G Massaquoi M.d., Ph.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
8Medicare enrollment records show Steve Massaquoi reassigns Medicare billing to 8 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
- 6,360 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Medford, MA 02155
- Reassigned Medicare billing, Massachusetts enrollment
- 246 clinicians in this Medicare group
Winchester, MA 01890
- Reassigned Medicare billing, Massachusetts enrollment
- 221 clinicians in this Medicare group
Milton, MA 02186
- Reassigned Medicare billing, Massachusetts enrollment
- 11 clinicians in this Medicare group
Burlington, MA 01805
- Reassigned Medicare billing, Massachusetts enrollment
- 477 clinicians in this Medicare group
Burlington, MA 01805
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1063447316 (Massachusetts)
- 1,574 clinicians in this Medicare group
Plymouth, MA 02360
- Reassigned Medicare billing, Massachusetts enrollment
- 239 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 2
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Northeast Hospital Corporation
Acute Care Hospitals · Beverly, MAWinchester Hospital
Acute Care Hospitals · Winchester, 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
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 Steve Massaquoi's NPI number?
The NPI number for Steve Massaquoi is 1811934813. It was assigned to this individual provider in the NPPES registry on May 31, 2006.
Where is Steve Massaquoi located?
Steve Massaquoi practices at 55 Fruit St Department Of Neurology, Boston, MA 02114. The listed phone number is (617) 726-2000.
What is Steve Massaquoi's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.
Is Steve Massaquoi enrolled in Medicare?
Yes. Steve Massaquoi 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 Steve Massaquoi's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Steve Massaquoi reassigns Medicare benefits to 8 organizations: Massachusetts General Physicians Organization Inc (Boston, MA), The General Hospital Corporation (Boston, MA), Hallmark Health Medical Associates Inc (Medford, MA), Winchester Physician Associates, Inc (Winchester, MA), Community Physicians Associates, Inc. (Milton, MA) and 3 more organizations, listed in the Medicare section above. 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 Steve Massaquoi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Steve Massaquoi accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Steve Massaquoi 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 Steve Massaquoi affiliated with any hospitals?
According to CMS data, Steve Massaquoi is affiliated with Northeast Hospital Corporation and Winchester Hospital.
When was this NPI record last updated?
The NPPES record for Steve Massaquoi was last updated on April 4, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Dr. Steve G Massaquoi, M.D., PH.D. · NPI 1811934813
Neurology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since May 31, 2006.
## Identity
- **NPI:** 1811934813 (Entity type: Individual)
- **Enumerated:** May 31, 2006
- **Primary specialty:** Psychiatry & Neurology - Neurology · taxonomy 2084N0400X
- **State license:** 56107 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 55 FRUIT ST, DEPARTMENT OF NEUROLOGY, Boston, MA 02114-2621
- **Phone:** (617) 726-2000
## 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:** 8 organizations under Medicare reassignment (form CMS-855R): Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA); Hallmark Health Medical Associates Inc (NPI 1770563900, Medford, MA); Winchester Physician Associates, Inc (NPI 1184606865, Winchester, MA); Community Physicians Associates, Inc. (NPI 1538154869, Milton, MA); and 3 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 1983
## Record status
- **NPPES last updated:** April 4, 2023
- **Other identifiers:** Medicaid 3194922 (MA); Other M00148 (MA); Other 158335 (MA); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1811934813) · Data from the CMS NPPES public registry.