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

Thomas J Halligan Jr.

Addiction (Substance Use Disorder) Counselor in Derby, VT · enumerated 2017.

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

National Provider Identifier

1811417256

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Registry record

Entity type Individual (Type 1)

Name Thomas J Halligan Jr.

Sex Male

Practice address Derby, VT, 05829

Phone (802) 334-6744

Enumeration date Jun 27, 2017

Last updated in NPPES Jun 27, 2017

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

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 151.0126525 (VT) 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

How do I verify Thomas Halligan's NPI record?

Cross-check NPI 1811417256 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1811417256 active?

Yes, as of the latest NPPES snapshot, NPI 1811417256 is active (record last updated 2017-06-27).

Other providers at this practice address

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Christine Colwell Addiction (Substance Use Disorder) Counselor · Derby, VT NPI 1649507682 Tony Graveline Mental Health Counselor · Derby, VT NPI 1023316494 Jane Pompeo Mental Health Counselor · Derby, VT NPI 1831519321 Brenda Tighe Mental Health Counselor · Derby, VT NPI 1861804833 Northeast Kingdom Human Services Inc Community/Behavioral Health Agency · Derby, VT NPI 1235548918 Nancy Loomis Clinical Social Worker · Derby, VT NPI 1083003099 Anne Lynch Clinical Social Worker · Derby, VT NPI 1174066245 Northeast Kingdom Human Services, Inc Behavior Analyst · Derby, VT NPI 1720528227

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-06-27.