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A & M INTERNAL MEDICINE, LTD.
NPI 1356558373
Internal Medicine in Carol Stream, IL

Active since May 17, 2007
27W170 SAINT CHARLES RD, CAROL STREAM, IL 60188(630) 562-9100(630) 388-0547 Get Directions Write a Review

NPPES record last updated: July 29, 2015. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About A & M Internal Medicine, Ltd. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

A & M INTERNAL MEDICINE, LTD. (NPI 1356558373) is a healthcare organization registered as an internal medicine in Carol Stream, Illinois and active in the NPI registry since May 2007. The organization lists Marc L Wiener, President, as its authorized official.

NPPES Registry Identity

NPI1356558373
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameA & M INTERNAL MEDICINE, LTD.
Location Address27W170 SAINT CHARLES RDCarol Stream, IL 60188-1935
Mailing Address27w170 Saint Charles RdCarol Stream, IL 60188-1935 · (630) 562-9100 · Fax (630) 388-0547
Phone(630) 562-9100
Fax(630) 388-0547
Organization SubpartNo
Authorized OfficialMarc L WienerPresident · (630) 562-9100
Enumeration DateMay 17, 2007
Last NPPES UpdateJuly 29, 2015
✔ NPI 1356558373 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
27W170 SAINT CHARLES RD, Carol Stream, IL 60188
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

A & M Internal Medicine, Ltd. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to A & M Internal Medicine, Ltd., which bills Medicare for the services this clinician delivers.

Clinician (1)

Marc Wiener, M.D.
Internal Medicine
NPI 1861435927
27W170 SAINT CHARLES RD
Carol Stream, IL 60188
(630) 562-9100
✔ PECOS✔ Accepts Medicare0.1 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is A & M Internal Medicine, Ltd.'s NPI number?

The NPI number for A & M Internal Medicine, Ltd. is 1356558373. It was assigned to this organization in the NPPES registry on May 17, 2007.

Where is A & M Internal Medicine, Ltd. located?

A & M Internal Medicine, Ltd. is located at 27w170 Saint Charles Rd, Carol Stream, IL 60188. The listed phone number is (630) 562-9100.

What is A & M Internal Medicine, Ltd.'s specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is A & M Internal Medicine, Ltd. enrolled in Medicare?

Yes. A & M Internal Medicine, Ltd. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through A & M Internal Medicine, Ltd.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to A & M Internal Medicine, Ltd.. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for A & M Internal Medicine, Ltd. was last updated on July 29, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.