Sinus Surgery Cost in Illinois (2026): Average Prices & What You'll Pay

What does a sinus surgery cost in Illinois?

Where you have a sinus surgery done in Illinois swings the bill from $926 to $3,995 for identical care. The median cash price across 84 reporting hospitals is $3,772. The numbers are pulled directly from federally mandated hospital price transparency files.

Where sinus surgery costs vary in Illinois

Pins show hospitals with price-transparency data (colored by vs. state average) and nearby ambulatory surgery centers and other facilities (colored by type). Click any pin for facility name and estimated cost range.

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Illinois presents two distinct markets: Chicago (highly competitive, high commercial rates, major academic medical centers) and downstate (lower density, smaller regional systems, lower rates). Northwestern Medicine, Advocate Aurora Health, and Rush University Medical Center compete aggressively in the Chicago market. Downstate Illinois prices typically run 20–35% below Chicago-area rates for identical services.

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Why prices vary - and what it means for your coverage

A small number of hospitals (4) report prices above $8,660, including Mercyhealth Hospital & Medical Center - Harvard at $8,112, which drives most of the overall spread - excluding them, most facilities cluster in a much tighter band. Setting matters too: the median outpatient price is $3,772 versus $817 inpatient, so where a procedure happens often matters more than which hospital you pick. Setting drives most of the spread here: an ambulatory surgical center (ASC) is usually meaningfully cheaper than a hospital operating room for the same procedure, when your case qualifies.

None of the prices above are what you'll necessarily owe: your deductible, out-of-pocket maximum, and each provider's network status all still apply.

Frequently asked questions: sinus surgery costs in Illinois

How much does a sinus surgery cost in Illinois?

The typical insurer-negotiated rate is $656, with most facilities between $176 and $3,636 (based on 84 hospitals reporting negotiated rates). Posted cash prices start at $961, with a median of $3,772; outlier facilities are left out. What you pay depends on the facility, your insurance, and whether you have met your deductible.

Where is the cheapest place to get a sinus surgery in Illinois?

Based on declared prices, the lowest posted price in our Illinois data is Endeavor Health Highland Park Hospital in Highland Park at about $961. By metro, Evanston has the lowest median ($2,468). Freestanding ambulatory surgery centers are often cheaper still and may not appear in hospital price data - ask your doctor whether one is an option.

Why is a sinus surgery so much cheaper at some Illinois hospitals?

Typical prices vary about 20.7× (25th to 70th percentile of negotiated rates) because each hospital sets its own list price, cash discount, and insurer-negotiated rates. In Illinois, the median cash (self-pay) price is $3,772 versus a median negotiated rate of $656 - about 5.8× higher. Asking for the cash price as well as your insurer's negotiated rate is often the single biggest lever on what you pay.

How much will I actually pay out of pocket for a sinus surgery in Illinois?

Your out-of-pocket cost depends on your deductible, coinsurance, out-of-pocket maximum, and whether the facility is in-network - not just the sticker price. If you have not met your deductible, you will typically pay the negotiated rate in full until you do. Use the CostKits cost forecaster to estimate your specific out-of-pocket amount before you go.

CostKits compiles hospital price transparency data to help families make informed decisions. Track and manage your healthcare costs (free account).