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

What does a appendectomy cost in Illinois?

A typical appendectomy in Illinois costs $3,336–$6,710 for a commercially insured patient, including facility and physician fees. The median reported facility price across 48 hospitals is $3,181. This estimate is based on CMS fee schedules and hospital price transparency data published under federal law.

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Where appendectomy costs vary in Illinois

Pins show hospitals with price-transparency data (colored by vs. state average) and nearby ambulatory surgery centers, imaging 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. Appendectomy is largely an emergency procedure, which eliminates most price shopping. The main cost driver is surgical approach and admission status: uncomplicated laparoscopic appendectomies are increasingly performed as same-day outpatient cases at substantially lower total cost than open or complicated inpatient stays. Your primary out-of-pocket exposure is driven by your deductible and whether the facility and surgeon are both in-network.

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Why prices vary - and what it means for your coverage

A small number of hospitals (8) report prices above $6,235, including Memorial Hospital - Chester at $18,810, 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 $3,181 versus $1,213 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.

On top of the facility price, your actual bill depends on your deductible, your out-of-pocket maximum, and whether every provider involved - not just the facility - is in-network.

Frequently asked questions: appendectomy costs in Illinois

How much does an appendectomy cost in Illinois?

The typical insurer-negotiated rate is $3,181, with most facilities between $1,064 and $3,308 (based on 46 hospitals reporting negotiated rates). Full market pricing - including cash rates, gross charges, and outlier facilities - ranges more widely, from $424 to $47,011 across all 48 Illinois hospitals that publish prices. What you pay depends on the facility, your insurance, and whether you have met your deductible.

Where is the cheapest place to get an appendectomy in Illinois?

Based on declared prices, the lowest-cost facility in our Illinois data is Deaconess Illinois Union County Hospital Inc in Anna at about $424. By metro, Chicago has the lowest median ($2,189). Freestanding ambulatory surgery and imaging centers are often cheaper still and may not appear in hospital price data - ask your doctor whether one is an option.

Why is an appendectomy so much cheaper at some Illinois hospitals?

Prices vary up to 110.9× because each hospital sets its own list price, cash discount, and insurer-negotiated rates. In Illinois, the median cash (self-pay) price is $3,181 versus a median negotiated rate of $3,181 - about 1× higher. Asking for the cash price or 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 an appendectomy 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.

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