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A & M Internal Medicine, Ltd.

Internal Medicine Physician in Carol Stream, IL · enumerated 2007 · authorized official Marc Wiener, President.

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

National Provider Identifier

1356558373

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Registry record

Entity type Organization (Type 2)
Legal business name A & M Internal Medicine, Ltd.
Practice address 27w170 Saint Charles Rd, Carol Stream, IL, 60188
Phone (630) 562-9100
Fax (630) 388-0547
Enumeration date May 17, 2007
Last updated in NPPES Jul 29, 2015

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Marc Wiener
Title President
Phone (630) 562-9100

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 type of organization is A & M Internal Medicine, Ltd.?
A & M Internal Medicine, Ltd. is registered in NPPES as a Internal Medicine 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 2015-07-29.