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Mountainside - Huntington

Substance Abuse Rehabilitation Facility in Huntington, NY · enumerated 2019 · authorized official Michelle Williamson, Sr Director, Revenue Cycle.

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

National Provider Identifier

1326506064

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Registry record

Entity type Organization (Type 2)
Legal business name Mountainside - Huntington
Practice address 141 E Main St Ste 2, Huntington, NY, 11743
Phone (860) 362-5232
Fax (877) 861-6507
Enumeration date Mar 12, 2019
Last updated in NPPES Mar 25, 2022

Taxonomy & classification

324500000X Substance Abuse Rehabilitation Facility Residential Treatment Facilities Primary

Authorized official

Name Michelle Williamson
Title Sr Director, Revenue Cycle
Phone (860) 362-5232

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 a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.
What type of organization is Mountainside - Huntington?
Mountainside - Huntington is registered in NPPES as a Substance Abuse Rehabilitation Facility (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-03-25.