Active NPI
Gayathri Sundaresan, M.D.
- Internal Medicine Physician
- Chicago, IL
National Provider Identifier
1114986650
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Internal Medicine Physician
- Practice address
- 3000 N Halsted St
Room 607
Chicago, IL 60657-5188 - Phone
- (773) 296-3456
- Fax
- (773) 296-3622
- NPI assigned
- Mar 22, 2006
- Sex
- Female
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Internal Medicine Physician | 207R00000X | IL | Primary |
Addresses
Primary practice location
3000 N Halsted St
Room 607
Chicago, IL 60657-5188
Mailing address
1730 Park St
Suite 101
Naperville, IL 60563-2688
Phone (630) 718-0200
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in IL
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 1
| Enrollment ID | State | Provider type | PAC ID | Details |
|---|---|---|---|---|
| I20211005001194 | IL | Order and Referring Only - Internal Medicine | 0345370375 |
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 036088372 | IL | MD | Internal Medicine Physician |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1142985600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1114986650",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "1730 PARK ST",
"address_2": "SUITE 101",
"city": "NAPERVILLE",
"state": "IL",
"postal_code": "605632688",
"telephone_number": "630-718-0200",
"fax_number": "630-718-0900"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "3000 N HALSTED ST",
"address_2": "ROOM 607",
"city": "CHICAGO",
"state": "IL",
"postal_code": "606575188",
"telephone_number": "773-296-3456",
"fax_number": "773-296-3622"
}
],
"practiceLocations": [],
"basic": {
"last_name": "SUNDARESAN",
"first_name": "GAYATHRI",
"name_prefix": "Dr.",
"credential": "M.D.",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2006-03-22",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "207R00000X",
"taxonomy_group": "",
"desc": "Internal Medicine",
"state": "IL",
"license": null,
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Chicago, IL
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.