Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Deirdre Lynn Callahan

Psychiatric/Mental Health Registered Nurse in Attleboro, MA · enumerated 2019.

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

National Provider Identifier

1851935894

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Registry record

Entity type Individual (Type 1)

Name Deirdre Lynn Callahan

Sex Female

Practice address 24 Park St, Attleboro, MA, 02703

Phone (774) 319-9257

Enumeration date Nov 2, 2019

Last updated in NPPES Feb 18, 2020

Taxonomy & licenses

163WP0808X Psychiatric/Mental Health Registered Nurse Nursing Service Providers · License RN2301072 (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.

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Frequently asked questions

What is the NPI number for Deirdre Callahan?

The National Provider Identifier (NPI) for Deirdre Callahan is 1851935894, a Type 1 (individual) record in the CMS NPPES registry.

Where does Deirdre Callahan practice?

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

Other providers at this practice address

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New England Center for Psychiatric and Addiction Disorders Psychiatry Physician · Attleboro, MA NPI 1083924013 New England Center for Psychiatric and Addiction Disorders, LLC Addiction Psychiatry Physician · Attleboro, MA NPI 1154713030 Madeleine Verdolino Psychiatric/Mental Health Nurse Practitioner · Attleboro, MA NPI 1538800123

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-02-18.