MR. MARK RICHARD GALLAGHER LICSW
NPI 1134280423
Social Worker - Clinical in Everett, MA
About Mr. Mark Richard Gallagher Licsw NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. MARK RICHARD GALLAGHER LICSW (NPI 1134280423) is an individual clinical provider in Everett, Massachusetts, licensed in Massachusetts (1026018) and active in the NPI registry since December 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mr. Mark Richard Gallagher Licsw is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Mark Gallagher reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Lexington, MA 02421
- Reassigned Medicare billing, Massachusetts enrollment
- 167 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
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02149 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.
EVERETT, MA 02149
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 Mark Gallagher's NPI number?
The NPI number for Mark Gallagher is 1134280423. It was assigned to this individual provider in the NPPES registry on December 12, 2006.
Where is Mark Gallagher located?
Mark Gallagher practices at 173 Chelsea St Tri City Mental Health Center, Everett, MA 02149. The listed phone number is (781) 388-6224.
What is Mark Gallagher's specialty?
The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.
Is Mark Gallagher enrolled in Medicare?
Yes. Mark Gallagher is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mark Gallagher's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Gallagher reassigns Medicare benefits to Eliot Community Human Services (Lexington, 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 Mark Gallagher'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 Mark Gallagher was last updated on July 8, 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.
# Mr. Mark Richard Gallagher, LICSW · NPI 1134280423
Clinical provider in Everett, Massachusetts. Individual provider, active in the CMS NPPES registry since December 12, 2006.
## Identity
- **NPI:** 1134280423 (Entity type: Individual)
- **Enumerated:** December 12, 2006
- **Primary specialty:** Social Worker - Clinical · taxonomy 1041C0700X
- **State license:** 1026018 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 173 CHELSEA ST, TRI CITY MENTAL HEALTH CENTER, Everett, MA 02149
- **Phone:** (781) 388-6224 · **Fax:** (617) 387-9768
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Eliot Community Human Services (NPI 1679648182, Lexington, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 8, 2007
- **Other identifiers:** Medicare ID-Type Unspecified P20183 (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1134280423) · Data from the CMS NPPES public registry.