Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MR. GUHAN ARUMUGAM SHANMUGASUNDARAM M.B.B.S.
NPI 1023800943
Radiology - Radiation Oncology in Chicago, IL

Q: What is Guhan Arumugam Shanmugasundaram's NPI number?

The NPI number for Guhan Arumugam Shanmugasundaram is 1023800943. It was assigned to this individual provider in the NPPES registry on May 19, 2025.

Q: What is Guhan Arumugam Shanmugasundaram's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.

Active since May 19, 2025

840 SOUTH WOOD STREET, ROOM 402, CLINICAL SCIENCES BUILDING, MAIL CODE 958, CHICAGO, IL 60612(312) 355-0104(312) 413-3483 Get Directions Write a Review

NPPES record last updated: August 7, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Aug 7, 2026, May 19, 2025 (2 updates tracked since 2025).

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About Mr. Guhan Arumugam Shanmugasundaram M.b.b.s. NPPES

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

MR. GUHAN ARUMUGAM SHANMUGASUNDARAM M.B.B.S. (NPI 1023800943) is an individual radiation oncology provider in Chicago, Illinois, licensed in Illinois (125086481) and active in the NPI registry since May 2025.

NPPES Registry Identity

NPI1023800943

Entity TypeIndividualMale

Primary Taxonomy2085R0001X

Provider Legal NameMR. GUHAN ARUMUGAM SHANMUGASUNDARAMCredential: M.B.B.S.

Location Address840 SOUTH WOOD STREET, ROOM 402, CLINICAL SCIENCES BUILDING, MAIL CODE 958Chicago, IL 60612

Mailing Address840 South Wood Street, Room 402, Clinical Sciences Building, Mail Code 958Chicago, IL 60612 · (312) 355-0104 · Fax (312) 413-3483

Phone(312) 355-0104

Fax(312) 413-3483

Sole ProprietorNo

Enumeration DateMay 19, 2025

Last NPPES UpdateAugust 7, 20262 updates tracked since enumeration

NPPES CertifiedAugust 7, 2026

✔ NPI 1023800943 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyRadiology · Radiation OncologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0001X

License✔ Licensed in IL · 125086481

Definition

A radiologist who deals with the therapeutic applications of radiant energy and its modifiers and the study and management of disease, especially malignant tumors.

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X · License 125086481 (IL)

840 SOUTH WOOD STREET, Chicago, IL 60612

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Other Providers at the Same Location NPPES 3

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

DR. GAIL ELIZABETH REID M.D.

Internal Medicine (Infectious Disease)

840 SOUTH WOOD STREET, UNIVERSITY OF ILLINOIS, CHICAGO, DEPT OF MEDICINE
CHICAGO, IL 60612

Cook County (312) 996-8337

KATHERINE A INGLE RD

Dietitian, Registered (Nutrition, Metabolic)

840 SOUTH WOOD STREET, PEDIATRIC GENETICS 12TH FLOOR M/C 856
CHICAGO, IL 60612

Cook County (312) 996-9283

DR. RYAN JAY EDNACOT ABRIGO MD

Pediatrics (Neonatal-Perinatal Medicine)

840 SOUTH WOOD STREET, DEPARTMENT OF PEDIATRICS (MC 856)
CHICAGO, IL 60612

Cook County (312) 996-4185

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 Guhan Arumugam Shanmugasundaram's NPI number?

The NPI number for Guhan Arumugam Shanmugasundaram is 1023800943. It was assigned to this individual provider in the NPPES registry on May 19, 2025.

Where is Guhan Arumugam Shanmugasundaram located?

Guhan Arumugam Shanmugasundaram practices at 840 South Wood Street Room 402, Clinical Sciences Building, Mail Code 958, Chicago, IL 60612. The listed phone number is (312) 355-0104.

What is Guhan Arumugam Shanmugasundaram's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.

When was this NPI record last updated?

The NPPES record for Guhan Arumugam Shanmugasundaram was last updated on August 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 days 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.