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

What does a colonoscopy cost in Illinois?

The cost of a colonoscopy in Illinois depends on how you pay. With commercial insurance it typically runs $934–$2,537, facility and physician fees combined. Medicare pays one national rate to every provider, and you generally owe about 20% of it (around $245) after the Part B deductible. Without insurance, posted hospital cash prices run $209–$1,883. The sections below break this down by coverage and by insurer. This estimate is based on CMS fee schedules and hospital price transparency data published under federal law.

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Where colonoscopy 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. Colonoscopy pricing is particularly sensitive to screening vs. diagnostic coding. A screening colonoscopy is typically covered at 100% under preventive care benefits, but if a polyp is removed or a finding is documented during the same visit, the claim is often re-coded as diagnostic - triggering your deductible and coinsurance. Ambulatory surgery centers perform over 70% of colonoscopies nationally and charge substantially less than hospital outpatient settings.

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Why prices vary - and what it means for your coverage

A small number of hospitals (7) report prices above $2,621, including Lawrence County Memorial Hospital at $5,485, 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 $691 versus $550 inpatient, so where a procedure happens often matters more than which hospital you pick. The biggest swing for this procedure is screening versus diagnostic coding - a polyp removed during a routine screening can recode the whole visit as diagnostic and trigger cost-sharing you weren't expecting.

What you pay out of pocket on top of this depends on your deductible, your plan's out-of-pocket maximum, and whether every provider involved is in-network - not just the facility.

Frequently asked questions: colonoscopy costs in Illinois

How much does a colonoscopy cost in Illinois?

The typical insurer-negotiated rate is $231, with most facilities between $66 and $633 (based on 143 hospitals reporting negotiated rates). That is the hospital's negotiated rate alone; with physician fees, a commercially insured patient's full episode is typically $934–$2,537. Posted cash prices at the middle 80% of Illinois hospitals run $209–$1,883; outlier facilities above and below that range 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 colonoscopy in Illinois?

Based on declared prices, the lowest posted price in our Illinois data is Northwest Community Hospital in Arlington Heights at about $209. By metro, Peoria has the lowest median ($209). 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 colonoscopy so much cheaper at some Illinois hospitals?

Typical prices vary about 9.6× (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 $712 versus a median negotiated rate of $1,245 - cash is the lower number at many hospitals. 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 colonoscopy 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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