R. SUNDARESAN, MD, SC
NPI 1427017961
Internal Medicine - Gastroenterology in Chicago, IL

Q: What is R. Sundaresan, MD, Sc's NPI number?

The NPI number for R. Sundaresan, MD, Sc is 1427017961. It was assigned to this organization in the NPPES registry on March 22, 2006.

Q: What is R. Sundaresan, MD, Sc's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Active since March 22, 2006

3000 N HALSTED ST, ROOM 607, CHICAGO, IL 60657(773) 296-3456(773) 296-3622 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Sep 11, 2025, Aug 22, 2020 (2 updates tracked since 2020).

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About R. Sundaresan, Md, Sc NPPES

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

R. SUNDARESAN, MD, SC (NPI 1427017961) is a healthcare organization registered as a gastroenterology in Chicago, Illinois and active in the NPI registry since March 2006. The organization lists Ramamoorthy Sundaresan, Physician Owner, as its authorized official.

NPPES Registry Identity

NPI1427017961

Entity TypeOrganization

Primary Taxonomy207RG0100X

Legal Business NameR. SUNDARESAN, MD, SC

Location Address3000 N HALSTED ST, ROOM 607Chicago, IL 60657-5188

Mailing Address1730 Park St, Suite 101Naperville, IL 60563-2688 · (630) 718-0200 · Fax (630) 718-0900

Phone(773) 296-3456

Fax(773) 296-3622

Organization SubpartNo

Authorized OfficialRamamoorthy SundaresanPhysician Owner · (630) 718-0200

Enumeration DateMarch 22, 2006

Last NPPES UpdateSeptember 11, 20252 updates tracked since enumeration

✔ NPI 1427017961 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

Also ListedInternal MedicineTaxonomy 207R00000X

3000 N HALSTED ST, Chicago, IL 60657

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Other Identifiers 1

Other01620377IL · Blue Cross / Blue Shield

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ADAJAR SURGICAL, S.C.

Surgery

3000 N HALSTED ST, SUITE 500
CHICAGO, IL 60657

Cook County (773) 310-3316

AMANDA ALLRED MS, GC

Genetic Counselor, MS

3000 N HALSTED ST
CHICAGO, IL 60657

Cook County (773) 296-6666

MARK PIETZ D.P.M.

Podiatrist

3000 N HALSTED ST, SUITE 821
CHICAGO, IL 60657

Cook County (773) 296-7160

LEVINE GYNECOLOGY OF CHICAGO, S.C.

Obstetrics & Gynecology (Gynecology)

3000 N HALSTED ST, SUITE 625
CHICAGO, IL 60657

Cook County (773) 296-3450

PAUL BERNARD RINGEL M.D.

Internal Medicine

3000 N HALSTED ST, SUITE 509
CHICAGO, IL 60657

Cook County (773) 296-5090

WHITNEY FRITZIE PA

Physician Assistant

3000 N HALSTED ST, SUITE 320
CHICAGO, IL 60657

Cook County (773) 296-3636

DR. SILVIA BICALHO M.D.

Obstetrics & Gynecology

3000 N HALSTED ST
CHICAGO, IL 60657

Cook County (773) 296-3300

CHICAGO ANESTHESIOLOGY PAIN SPECIALISTS LLC

Anesthesiology (Pain Medicine)

3000 N HALSTED ST
CHICAGO, IL 60657

Cook County (773) 296-7937

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 R. Sundaresan, MD, Sc's NPI number?

The NPI number for R. Sundaresan, MD, Sc is 1427017961. It was assigned to this organization in the NPPES registry on March 22, 2006.

Where is R. Sundaresan, MD, Sc located?

R. Sundaresan, MD, Sc is located at 3000 N Halsted St Room 607, Chicago, IL 60657. The listed phone number is (773) 296-3456.

What is R. Sundaresan, MD, Sc's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

When was this NPI record last updated?

The NPPES record for R. Sundaresan, MD, Sc was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months 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.