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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. GAYATHRI SUNDARESAN M.D.
NPI 1114986650
Internal Medicine in Chicago, IL

Active since March 22, 2006PECOS Enrolled
3000 N HALSTED ST, ROOM 607, CHICAGO, IL 60657(773) 296-3456(773) 296-3622 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Gayathri Sundaresan M.d. NPPES

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

DR. GAYATHRI SUNDARESAN M.D. (NPI 1114986650) is an individual internal medicine provider in Chicago, Illinois and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1114986650
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. GAYATHRI SUNDARESANCredential: M.D.
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
Sole ProprietorNo
Enumeration DateMarch 22, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1114986650 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.
3000 N HALSTED ST, Chicago, IL 60657
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Gayathri Sundaresan M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60657 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$138.86 typical visit price
range $60.08 – $183.39
Typical copayment $34.71 (range $15.02 – $45.84)
Most-billed visit code 99204
Established Patient
$105.70 typical visit price
range $18.97 – $148.12
Typical copayment $26.42 (range $4.74 – $37.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Gayathri Sundaresan's NPI number?

The NPI number for Gayathri Sundaresan is 1114986650. It was assigned to this individual provider in the NPPES registry on March 22, 2006.

Where is Gayathri Sundaresan located?

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

What is Gayathri Sundaresan's specialty?

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

Is Gayathri Sundaresan enrolled in Medicare?

Yes. Gayathri Sundaresan is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Gayathri Sundaresan was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.