Mr. Mark Richard Gallagher, LICSW
Mr. Mark Richard Gallagher is a Clinical Social Worker provider (Social Worker) practicing in Everett, MA, registered in the NPPES registry with NPI 1134280423 since 2006.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1134280423 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Mr. Mark Richard Gallagher |
| Credential | LICSW |
| Sex | Male |
| Practice address | 173 CHELSEA ST, TRI CITY MENTAL HEALTH CENTER, Everett, MA, 02149 |
| Phone | 7813886224 |
| Fax | 6173879768 |
| Enumeration date | 2006-12-12 |
| Last updated in NPPES | 2007-07-08 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 1041C0700X | Clinical Social Worker | Primary | 1026018 | MA |
Copy-ready billing details
Provider: Mark Gallagher, LICSW NPI: 1134280423 Taxonomy: 1041C0700X (Clinical Social Worker) Address: 173 CHELSEA ST, TRI CITY MENTAL HEALTH CENTER, Everett, MA, 02149
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1427015627 | Roger Greiger | Individual | Psychiatry Physician | Everett, MA |
| 1285749945 | German Crisostomo | Individual | Psychiatry Physician | Everett, MA |
| 1306941893 | Susan Martinson | Individual | Psychiatric/Mental Health Nurse Practitioner | Everett, MA |
| 1013083971 | Ellen Cyr | Individual | Mental Health Counselor | Everett, MA |
| 1477614675 | Joan Smyth | Individual | Adult Psychiatric/Mental Health Registered Nurse | Everett, MA |
| 1730240904 | Elsbeth Riemer | Individual | Mental Health Counselor | Everett, MA |
| 1932261559 | William Brinkley | Individual | Clinical Social Worker | Everett, MA |
| 1831251628 | Alice Hayes | Individual | Clinical Social Worker | Everett, MA |
Verify this record
Cross-check NPI 1134280423 against the authoritative CMS record: view Mr. Mark Richard Gallagher on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.