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Nephrology Associates Northern Illinois / Indiana (NANI) is a large privately held nephrology practice founded in 1968 and headquartered in Oak Brook, IL. It operates 28 offices across the United States (primarily Illinois and Indiana) and employs over 125 physicians with around 116 staff. NANI provides comprehensive kidney disease and hypertension care, offering a wide range of nephrology services through a broad network of specialists. Although the listing highlights locations in Illinois and Indiana, there is no specific information about a NANI facility in Carlinville, IL.

Clinic Type

Nephrology

Address

120 W. 22nd St., Oak Brook, IL 60523, US

Phone

630-573-5000

Email

OCRComplaint@hhs.gov

Opening Hours

Not published — contact the clinic to confirm hours.

Telehealth

Available

Services Offered

  • Nephrology care
  • Kidney disease management
  • Kidney transplantation
  • Vascular care
  • Telehealth appointments
  • In-office appointments

Technology & Equipment

  • world-class technology for kidney care and outcomes
  • transplantation expertise
  • advanced diagnostic and therapeutic strategies

Team

  • NANI Clinicians, Board-certified — Board-certified kidney specialists

Insurance & Payment

  • most major insurance plans

No specific plans listed; states that most major insurance plans are accepted

in-person payments, telehealth payments, billing questions site info

Languages Spoken

—

Pricing

  • Not publicly listed

Current Offers

Find a Specialist

FAQs

What services are offered?

Nephrology care, kidney disease management, transplantation, vascular care, telehealth, in-office visits.

Photos

What Patients Say

Overall sentiment across review platforms: mixed

  • Indeed (Employee reviews): 4.0 out of 5 stars (based on 158 employee reviews) (158)
  • Glassdoor (Employee reviews): 2.9 out of 5 stars (based on 31 anonymous reviews) (31)

Patients praise

  • Many patients praise doctors for being knowledgeable, caring, and attentive listeners
  • Positive feedback on treatment effectiveness and quality of medical care
  • Some locations noted for having friendly and efficient staff
  • Employees appreciate aspects of the work environment at certain offices

Common complaints

  • Occasional reports of rude or condescending behavior by specific staff or physicians
  • Concerns regarding difficulty scheduling or administrative responsiveness
  • Some employees report dissatisfaction with office management and work-life balance at certain locations

"The staff and the doctors take the time to listen and explain what type of treatment you need."

— Patient review of NANI Merrillville office

"Terrible customer/patient service! Staff is rude and not very accommodating... Avoid Dr. Choi if at all possible he is extremely rude and very condescending!"

— Patient review of NANI Merrillville office

"All the doctors here are excellent. Very well bedside manner, and are very attentive to what is needed to be said. The staff as well, very nice and welcoming every time I stop by."

— Patient review of NANI Mount Prospect office

Synthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].

In the News

Information sourced from the clinic's website as of July 11, 2026.

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