Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Northern Illinois Diagnostic Medical Imaging

Nuclear Radiology Physician in Elmhurst, IL · enumerated 2005 · authorized official Robert Peiss, Chairman.

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

National Provider Identifier

1396744751

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Registry record

Entity type Organization (Type 2)

Legal business name Northern Illinois Diagnostic Medical Imaging

Other name <Unavail>

Practice address 200 Berteau Ave, Elmhurst, IL, 60126

Phone (630) 833-1400

Enumeration date Jul 19, 2005

Last updated in NPPES Feb 9, 2009

Taxonomy & classification

2085N0904X Nuclear Radiology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Robert Peiss

Title Chairman

Phone (630) 833-1400

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 Northern Illinois Diagnostic Medical Imaging?

Northern Illinois Diagnostic Medical Imaging is registered in NPPES as a Nuclear Radiology Physician (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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-02-09.