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Nephrologists who accept Medicare in Oak Brook, IL
CMS lists 3 clinicians in this specialty with a practice address in Oak Brook. Accept Medicare assignment (the Medicare-approved amount as full payment): 1. Offer telehealth: 1.
Typical amounts Medicare approves in ZIP 60523 (2024 Medicare rates, the latest CMS has published): a new-patient visit $137, of which you pay about $34; a follow-up visit $105, of which you pay about $26 — the 20% coinsurance after the yearly Part B deductible. Clinicians who don't accept assignment can charge up to 15% more; with a Medicare Advantage plan, your plan's copay applies instead.
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Order: clinicians who accept assignment first, then by MIPS score (highest first), then by last name.
Mohammed J. Ansari, MD
✓ Accepts Medicare assignmentMIPS score (2024): 95.2/100✓ TelehealthGraduated 1996MaleDrug and device company payments (2025): $18,783Kousalya M. Arunagiri
May accept assignmentGraduated 2000FemaleDrug and device company payments (2025): $417Shori Gerardot, MD
May accept assignmentGraduated 2020 · Indiana University School of MedicineMaleDrug and device company payments (2025): $841
Before you book
This list comes from Medicare's enrollment records, not from reviews. Call the office to confirm the clinician is taking new Medicare patients. With Original Medicare, a clinician who accepts assignment can only charge you the Medicare deductible and coinsurance; one who doesn't may charge up to 15% more than the Medicare-approved amount. If you have a Medicare Advantage plan, check that the clinician is in the plan's network.
The MIPS final score (0–100) comes from Medicare's Merit-based Incentive Payment System for 2024. It combines quality measures, cost, improvement activities and use of certified health records, and it sets a payment adjustment. Clinicians who report as a group share the group's score. It is not a patient rating, and many clinicians have no published score.
Payments from drug and medical device companies come from CMS Open Payments (2025 general payments: meals, travel, consulting and speaking fees, gifts and similar), summed for each clinician. Receiving payments is legal and common and does not mean a clinician did anything wrong.
Other specialists in Oak Brook
- Primary care doctors39
- Nurse practitioners87
- Cardiologists14
- Dermatologists6
- Orthopedic surgeons7
- Neurologists8
- Gastroenterologists6
- Optometrists3
- Podiatrists10
- Oncologists8
- Psychiatrists25
- Psychologists26
- Therapists and counselors107
- Physical therapists146
- Occupational therapists24
- Audiologists3
- Chiropractors25
- Gynecologists5
- General surgeons5
- Pain management doctors4
- Physiatrists7
Other care in Oak Brook
Hospitals · Nursing homes · Dialysis centers
Nearby cities
Enrollment, addresses and scores are as reported to CMS and can change. This is not a list of in-network providers for any Medicare Advantage plan, and it is not medical advice. Source: CMS Provider Data Catalog — Doctors and Clinicians National Downloadable File, Clinician MIPS Performance 2024 and Facility Affiliation Data (released Oct 2, 2026).