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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

LIAM SULLIVAN
NPI 1013804061
Social Worker in Somerville, MA

Active since June 23, 2025
61 INNERBELT RD, SOMERVILLE, MA 02143(617) 863-5400 Get Directions Write a Review

NPPES record last updated: October 7, 2026. Verified against the NPPES registry weekly; last sync: October 11, 2026.

Record update history: Oct 7, 2026, Jun 23, 2025 (2 updates tracked since 2025).

About Liam Sullivan NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

LIAM SULLIVAN (NPI 1013804061) is an individual social worker in Somerville, Massachusetts, licensed in Massachusetts (LCSW2143829) and active in the NPI registry since June 2025.

NPPES Registry Identity

NPI1013804061
Entity TypeIndividualMale
Primary Taxonomy104100000X
Provider Legal NameLIAM SULLIVAN
Location Address61 INNERBELT RDSomerville, MA 02143-4416
Mailing Address61 Innerbelt RdSomerville, MA 02143-4416 · (617) 863-5400
Phone(617) 863-5400
Sole ProprietorNo
Enumeration DateJune 23, 2025
Last NPPES UpdateOctober 7, 20262 updates tracked since enumeration
NPPES CertifiedOctober 7, 2026
✔ NPI 1013804061 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial WorkerBehavioral Health & Social Service Providers
Taxonomy Code104100000X
License✔ Licensed in MA · LCSW2143829
Definition
A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public.
61 INNERBELT RD, Somerville, MA 02143
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Other Providers at the Same Location NPPES 7

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

AARON WERTHEIMER
Social Worker
61 INNERBELT RD
SOMERVILLE, MA 02143
Middlesex County (857) 330-3669
LINDSEY ANDERSEN LICSW
Social Worker (Clinical)
61 INNERBELT RD
SOMERVILLE, MA 02143
Middlesex County (617) 764-6351
JULIA SHEEHAN LCSW
Social Worker (Clinical)
61 INNERBELT RD
SOMERVILLE, MA 02143
Middlesex County (617) 404-5097
FRANCES ANNA KIMBALL-KATZ LCSW
Social Worker
61 INNERBELT RD
SOMERVILLE, MA 02143
Middlesex County (617) 549-2915
MAN CHUNG CHONG
Counselor
61 INNERBELT RD
SOMERVILLE, MA 02143
Middlesex County (857) 895-6514
LIOR DAHAN
Social Worker (Clinical)
61 INNERBELT RD
SOMERVILLE, MA 02143
Middlesex County (617) 863-5400
JILL O'GARA LCSW
Social Worker
61 INNERBELT RD
SOMERVILLE, MA 02143
Middlesex County (508) 861-9322

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 Liam Sullivan's NPI number?

The NPI number for Liam Sullivan is 1013804061. It was assigned to this individual provider in the NPPES registry on June 23, 2025.

Where is Liam Sullivan located?

Liam Sullivan practices at 61 Innerbelt Rd, Somerville, MA 02143. The listed phone number is (617) 863-5400.

What is Liam Sullivan's specialty?

The primary specialty registered for this NPI is Social Worker with taxonomy code 104100000X.

When was this NPI record last updated?

The NPPES record for Liam Sullivan was last updated on October 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 days 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.