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Access Behavioral Services

Substance Use Disorder Rehabilitation Clinic/Center in Chicago, IL · enumerated 2014 · authorized official Ernestina Ontiveros, President/Ceo.

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

National Provider Identifier

1023434917

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Registry record

Entity type Organization (Type 2)
Legal business name Access Behavioral Services
Practice address 3948 W 26th St, Suite 114, Chicago, IL, 60623
Phone (773) 522-5460
Fax (773) 522-5465
Enumeration date Mar 15, 2014
Last updated in NPPES Mar 15, 2014

Taxonomy & classification

251S00000X Community/Behavioral Health Agency Agencies · License A-8712-0001-A (IL) Secondary
261QR0405X Substance Use Disorder Rehabilitation Clinic/Center Ambulatory Health Care Facilities · License A-8712-0001-A (IL) Primary

Authorized official

Name Ernestina Ontiveros
Title President/Ceo
Phone (773) 522-5460

Other identifiers

Identifier Type State Issuer
A-8712-0001-A Other IL STATE LICENSE

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 current is this record?
Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2014-03-15. Verify at npiregistry.cms.hhs.gov.
Where is Access Behavioral Services located?
The practice location on file with NPPES is in Chicago, IL.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-03-15.