Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Tendernest Behavioral Group, LLC

Behavior Analyst in North Chelmsford, MA · enumerated 2026 · authorized official Kathryn Sapp, Owner/Bcba.

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

National Provider Identifier

1558212050

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Registry record

Entity type Organization (Type 2)

Legal business name Tendernest Behavioral Group, LLC

Practice address 263 Groton Rd, North Chelmsford, MA, 01863

Phone (508) 654-9441

Fax (978) 545-9080

Enumeration date Feb 9, 2026

Last updated in NPPES Feb 9, 2026

Taxonomy & classification

103K00000X Behavior Analyst Behavioral Health & Social Service Providers Primary

Authorized official

Name Kathryn Sapp

Title Owner/Bcba

Phone (508) 654-9441

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 is Tendernest Behavioral Group, LLC located?

The practice location on file with NPPES is in North Chelmsford, MA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2026-02-09. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Kathryn Sapp Behavior Analyst · North Chelmsford, MA NPI 1730466921

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-09.