Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Kathryn Granigan, LICSW

Social Worker in Marshfield, MA · enumerated 2006.

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

National Provider Identifier

1891891701

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Registry record

Entity type Individual (Type 1)

Name Kathryn Granigan

Credential LICSW

Sex Female

Practice address 475 School St, Suite 17, Marshfield, MA, 02050

Phone (781) 837-7444

Enumeration date Sep 16, 2006

Last updated in NPPES Jul 9, 2007

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 1027202 (MA) Primary

Other identifiers

Identifier	Type	State	Issuer
1853287	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.

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Frequently asked questions

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.

What specialty is Kathryn Granigan?

Kathryn Granigan 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.