Abacus Program

Abacus Program is a healthcare organization registered as Substance Use Disorder Rehabilitation Clinic/Center in Elgin, IL, holding Type 2 (organization) NPI 1356560320 since 2007. The authorized official on file is Dennis Dee, Program Director.

✓ Active NPI ✓ Valid NPI checksum

NPI	1356560320
Entity type	Organization (Type 2)
Legal business name	Abacus Program
Practice address	555 TOLLGATE RD STE A, Elgin, IL, 60123
Phone	8477420413
Fax	8477421393
Enumeration date	2007-04-25
Last updated in NPPES	2008-10-24

Authorized official

Name	Dennis Dee
Title	Program Director
Phone	8477420413

Taxonomy & classification

Taxonomy code	Specialty	Primary	License	State
261QR0405X	Substance Use Disorder Rehabilitation Clinic/Center	Primary	A00150001A	IL

Copy-ready billing details

Provider: Abacus Program
NPI: 1356560320
Taxonomy: 261QR0405X (Substance Use Disorder Rehabilitation Clinic/Center)
Address: 555 TOLLGATE RD STE A, Elgin, IL, 60123

Verify this record

Cross-check NPI 1356560320 against the authoritative CMS record: view Abacus Program on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

Where is Abacus Program located?

The practice location on file with NPPES is in Elgin, IL.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2008-10-24. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-09. Provider record last updated 2008-10-24.