Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Liam Sullivan
Social Worker in Somerville, MA · enumerated 2025.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1013804061
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Registry record
Entity type Individual (Type 1)
Name Liam Sullivan
Sex Male
Practice address 61 Innerbelt Rd, Somerville, MA, 02143
Phone (617) 863-5400
Enumeration date Jun 23, 2025
Last updated in NPPES Oct 7, 2026
Taxonomy & licenses
104100000X Social Worker Behavioral Health & Social Service Providers · License LCSW2143829 (MA) Primary
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.
Frequently asked questions
Is NPI 1013804061 active?
Yes, as of the latest NPPES snapshot, NPI 1013804061 is active (record last updated 2026-10-07).
How do I verify Liam Sullivan's NPI record?
Cross-check NPI 1013804061 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → Man Chung Chong Counselor · Somerville, MA NPI 1861172744 Lindsey Andersen Clinical Social Worker · Somerville, MA NPI 1326894668 Aaron Wertheimer Social Worker · Somerville, MA NPI 1194552216 Jill O'Gara Social Worker · Somerville, MA NPI 1902625767 Frances Kimball-Katz Social Worker · Somerville, MA NPI 1629885629 Julia Sheehan Clinical Social Worker · Somerville, MA NPI 1578368528 Lior Dahan Clinical Social Worker · Somerville, MA NPI 1861350696
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-10-07.