Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Oak Brook Clinic, LLC

Q: What type of organization is Oak Brook Clinic, LLC?

Oak Brook Clinic, LLC is registered in NPPES as a Methadone Clinic (its primary provider taxonomy).

Methadone Clinic in Oak Brook, IL · enumerated 2020 · authorized official Jim Weiss, Director of Quality Management.

Data current as of Jul 11, 2026 · sourced from CMS NPPES

National Provider Identifier

1508492745

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Registry record

Entity type Organization (Type 2)

Legal business name Oak Brook Clinic, LLC

Practice address 2605 W 22nd St Ste 29, Oak Brook, IL, 60523

Phone (630) 819-8100

Fax (630) 568-3362

Enumeration date Mar 19, 2020

Last updated in NPPES Aug 5, 2021

Taxonomy & classification

261QR0405X Substance Use Disorder Rehabilitation Clinic/Center Ambulatory Health Care Facilities Secondary

261QM2800X Methadone Clinic Ambulatory Health Care Facilities Primary

Authorized official

Name Jim Weiss

Title Director of Quality Management

Phone (402) 339-1436

Other identifiers

Identifier	Type	State	Issuer
A-2158-0000-A	Other	IL	STATE OF ILLINOIS, SUPR

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

What type of organization is Oak Brook Clinic, LLC?

Oak Brook Clinic, LLC is registered in NPPES as a Methadone Clinic (its primary provider taxonomy).

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.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2021-08-05.