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

What does a colonoscopy cost in Illinois?

For a commercially insured patient, a colonoscopy in Illinois typically runs $994–$2,681 once facility and physician fees are combined. The median reported facility price across 101 hospitals is $866. The figures draw on CMS fee schedules and hospital price transparency data published under federal law.

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.

Even within Illinois, Melrose Park ($243) and Gibson City ($7,783) are 32× apart on the median price. Illinois prices for a colonoscopy span 934.4× across 101 reporting hospitals, from $101 (Salem Township Hospital in Salem) up to $94,377 (CGH Medical Center) for identical care. Half of Illinois facilities price it at or below $866, with most clustered between $448 and $1,325. Insurers negotiate this down to a median of $448, while self-pay patients are quoted $930 — about 2.1× higher, so asking for the cash or insurer-negotiated rate is often the single biggest lever on your bill.

Where colonoscopy 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.

Estimate YOUR exact out-of-pocket cost →

The facility you choose matters more than almost anything else — the same procedure, same quality, same state can cost 5× more at one hospital versus the one down the road.

→ Compare all procedure costs   → Colonoscopy costs nationwide

Check YOUR hospital's pricing → Estimate YOUR exact cost →

Lower-cost options in Illinois start around $448 or below. Most hospitals cluster between $448 and $1,335. A smaller group reports prices above that — often academic medical centers or high-cost markets.

If you're comparing specific hospitals, the lowest self-pay rates reported in this dataset include: Ferrell Hospital Community Foundation in Eldorado (cash price from $201); Blessing Care Corporation in Pittsfield (cash price from $202); Kirby Medical Center in Monticello (cash price from $208). These are declared cash prices — contact each facility for a formal quote before scheduling.

Illinois Colonoscopy prices by facility

All prices below come from hospital chargemasters — the official price lists each hospital must publish under federal law. Gross charge is the undiscounted list price; cash price is the self-pay rate; negotiated range covers the spread across insurance contracts.

Source: CMS hospital price transparency machine-readable files. vs Median = savings or premium relative to the state median price. Gross Charge = undiscounted list price for reference.

Received a bill? Check it for errors → Estimate YOUR cost before you go →

Compare other procedures in Illinois:

• Appendectomy Cost in Illinois
• Cataract Surgery Cost in Illinois

Where you can save the most on colonoscopy in Illinois

These facilities have the lowest declared prices relative to the state median — they represent the best opportunities to reduce your out-of-pocket cost for this procedure.

Most expensive colonoscopy providers in Illinois

These facilities report the highest prices for this procedure. Academic medical centers and specialty hospitals often top this list — their gross charges rarely reflect what anyone actually pays, but understanding the spread helps you negotiate.

Why prices vary this much

A small number of hospitals (15) report very high prices above $2,666, which drives much of the overall price range. Excluding these, most facilities cluster in a significantly tighter band.

Setting drives much of the gap in Illinois: the median outpatient price is $827 versus $827 inpatient, so where a procedure is performed often matters more than which hospital you choose. Of the Illinois facilities reporting prices, 37 fall in a low-cost tier (up to $448) while 37 sit in a high-cost tier ($1,335 and up) — a lower-priced option almost always exists within the same state.

Among the cities with the most reporting hospitals, Chicago has a median reported price of $1,329 across 21 facilities, while facilities in Melrose Park tend to report lower prices (median: $243). City-level variation within a state often reflects local market structure, not procedure complexity.

The spread comes from how each hospital sets its chargemaster (the undiscounted list price), what cash discounts it applies, and what rates it negotiates with each insurer. Facility classification matters too — a hospital-owned outpatient center adds a facility fee that a freestanding clinic does not. Understanding these mechanics is the first step to paying less.

Learn more:
→ Allowed amount vs negotiated rate — what your EOB is really saying
→ How to read your medical bill
→ Why hospital prices are so hard to find — and what to do about it

How insurance changes what you actually pay

Hospital list prices are only part of the picture. What you pay out of pocket depends on your deductible, your plan's out-of-pocket maximum, whether the facility is in-network, and whether your plan classifies the visit as outpatient or inpatient. A lower gross charge doesn't guarantee a lower bill if the facility is out-of-network or adds facility fees your plan doesn't cover.

Understand your cost before you go:
→ Deductible vs out-of-pocket max
→ EOB vs medical bill — complete guide
→ How to stop medical bill problems before they start (in-network vs out-of-network)

Colonoscopy Costs by Metro Area in Illinois

Prices vary across Illinois metro areas based on local hospital competition, wage adjustments, and facility mix. Explore detailed facility price data for each metro area:

• Colonoscopy Cost in Champaign, IL
• Colonoscopy Cost in Chicago, IL
• Colonoscopy Cost in Kankakee, IL
• Colonoscopy Cost in Peoria, IL
• Colonoscopy Cost in Rockford, IL

Compare colonoscopy costs in nearby states

• Wisconsin
• Iowa
• Indiana
• Missouri

Frequently asked questions: colonoscopy costs in Illinois

How much does a colonoscopy cost in Illinois?

Across 101 Illinois hospitals that publish prices, a colonoscopy ranges from $101 to $94,377, with a median of $866. Most facilities fall between $448 and $1,325. 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-cost facility in our Illinois data is Salem Township Hospital in Salem at about $19. By metro, Melrose Park has the lowest median ($243). 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 a colonoscopy so much cheaper at some Illinois hospitals?

Prices vary up to 934.4× because each hospital sets its own list price, cash discount, and insurer-negotiated rates. In Illinois, the median cash (self-pay) price is $930 versus a median negotiated rate of $448 — about 2.1× 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 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.

Explore all colonoscopy cost data

→ See colonoscopy costs across all states