Our patients are our top priority.

Contact Us

NANI Corporate

120 W. 22nd Street
Oak Brook, Illinois 60523
Ph: 630-573-5000
Fax: 630-368-0320

NW Indiana

90 W. 86th Avenue
Merrillville, Indiana 46410
Ph: 219-791-1555
Fax 219-791-1560

Fort Wayne, Indiana

7836 W. Jefferson Blvd
Fort Wayne, IN 46804
Ph: 260-494-3484
Fax: 260-969-0188

Billing or insurance questions:

For Illinois patients: 866-785-3627
For Fort Wayne region patients: 866-785-3627
For Northwest Indiana patients: 866-288-6264


If you have an emergency, go to your nearest hospital Emergency Room (ER).


If your call is not an emergency, but you need a doctor, call your physician’s office and the on-call physician will be paged.

You can send a secure message directly to the doctor’s office through your Patient Portal account. Get more information here.

Leave a message:

If you want to leave a message outside of business hours, call your physician’s office and the answering service will answer. Your message will be retrieved the next business day.

Find a doctor or dialysis center:

Find a Kidney Doctor
Find a Dialysis Center

NANI Corporate Office, Oak Brook, Illinois

Note: This is not a clinic location


Corporate Office, Oak Brook