Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Cathlyn M Hill, MSW LICSW

Social Worker in Chelmsford, MA · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1407969884

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Registry record

Entity type Individual (Type 1)

Name Cathlyn M Hill

Credential MSW LICSW

Sex Female

Practice address 201 Chelmsford St, Chelmsford, MA, 01824

Phone (978) 256-1467

Fax (978) 256-7465

Enumeration date Aug 17, 2006

Last updated in NPPES Mar 9, 2008

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 106290 (MA) Primary

Other identifiers

Identifier	Type	State	Issuer
1102303	Medicaid	MA	-

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 → Validate an NPI →

Frequently asked questions

What specialty is Cathlyn Hill?

Cathlyn Hill is registered in NPPES with the primary taxonomy of Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-03-09.