Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Katherine Tigelaar, LICSW

Clinical Social Worker in Reading, MA · enumerated 2007.

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

National Provider Identifier

1275655375

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Registry record

Entity type Individual (Type 1)

Name Katherine Tigelaar

Credential LICSW

Sex Female

Practice address 160 Summer Ave, Reading, MA, 01867

Phone (857) 245-9296

Enumeration date Apr 6, 2007

Last updated in NPPES Sep 8, 2025

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 113644 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Katherine Tigelaar practice?

The practice location on file with NPPES is in Reading, MA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Katherine Tigelaar?

The National Provider Identifier (NPI) for Katherine Tigelaar is 1275655375, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-08.