Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Esther Marsh, LMSW,BCBA

Q: What is the NPI number for Esther Marsh?

The National Provider Identifier (NPI) for Esther Marsh is 1326291477, a Type 1 (individual) record in the CMS NPPES registry.

Behavior Analyst in Sandwich, MA · enumerated 2008.

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

National Provider Identifier

1326291477

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Registry record

Entity type Individual (Type 1)

Name Esther Marsh

Credential LMSW,BCBA

Sex Female

Practice address Sandwich, MA, 02563

Phone (508) 420-0922

Enumeration date Nov 2, 2008

Last updated in NPPES Nov 19, 2010

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License 1-08-4048 Primary

104100000X Social Worker Behavioral Health & Social Service Providers · License 050801-1 (NY) Secondary

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 Esther Marsh practice?

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

What is the NPI number for Esther Marsh?

The National Provider Identifier (NPI) for Esther Marsh is 1326291477, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-11-19.