Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Progressive Institute of Allergy, Inc.

Q: What is the NPI number for Progressive Institute of Allergy, Inc.?

The NPI for Progressive Institute of Allergy, Inc. is 1457479420, a Type 2 (organization) record in the CMS NPPES registry.

Allergy Physician in Chicago, IL · enumerated 2007 · authorized official John Froelich, President.

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

National Provider Identifier

1457479420

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Registry record

Entity type Organization (Type 2)

Legal business name Progressive Institute of Allergy, Inc.

Practice address 5351 W Lawrence Ave, Chicago, IL, 60630

Phone (773) 485-1958

Fax (773) 427-7865

Enumeration date Mar 27, 2007

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

207KA0200X Allergy Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name John Froelich

Title President

Phone (773) 485-1958

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

What is the NPI number for Progressive Institute of Allergy, Inc.?

The NPI for Progressive Institute of Allergy, Inc. is 1457479420, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Progressive Institute of Allergy, Inc.?

NPPES lists John Froelich (President) as the authorized official for this organization.

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