Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Infectious Disease Specialists of Chicago

Infectious Disease Physician in Chicago, IL · enumerated 2006 · authorized official Gordon Trenholme, President.

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

National Provider Identifier

1194786574

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name Infectious Disease Specialists of Chicago

Practice address 600 S Paulina St, Suite 143, Chicago, IL, 60612

Phone (312) 942-2061

Fax (312) 942-2184

Enumeration date Mar 28, 2006

Last updated in NPPES Dec 3, 2007

Taxonomy & classification

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Gordon Trenholme

Title President

Phone (312) 942-2061

Other identifiers

Identifier	Type	State	Issuer
21623155	Other	IL	BLUE SHIELD GROUP #
CJ6213	Other	IL	RR MEDICARE GROUP #

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 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 Infectious Disease Specialists of Chicago?

Infectious Disease Specialists of Chicago is registered in NPPES as a Infectious Disease Physician (its primary provider taxonomy).

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-12-03.