Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Associate S in Gastroenterology & Liver Disease , LLC

Specialist in Lake Forest, IL · enumerated 2006 · authorized official Pat Fradkin, Office Manager.

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

National Provider Identifier

1558315747

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Registry record

Entity type Organization (Type 2)

Legal business name Associate S in Gastroenterology & Liver Disease , LLC

Practice address 800 N Westmoreland Rd, Suite 102, Lake Forest, IL, 60045

Phone (847) 295-1300

Fax (847) 295-1574

Enumeration date May 20, 2006

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

174400000X Specialist Other Service Providers Primary

Authorized official

Name Pat Fradkin

Title Office Manager

Phone (847) 295-1300

Other identifiers

Identifier	Type	State	Issuer
04929961	Other	IL	BLUE SHIELD

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

Who is the authorized official for Associate S in Gastroenterology & Liver Disease , LLC?

NPPES lists Pat Fradkin (Office Manager) as the authorized official for this organization.

What is the NPI number for Associate S in Gastroenterology & Liver Disease , LLC?

The NPI for Associate S in Gastroenterology & Liver Disease , LLC is 1558315747, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.