Screening colonoscopy cost in Chicago, IL
In Chicago-Naperville-Elgin, IL-IN, 10 hospitals list a cash price for screening colonoscopy for a person at average risk (Medicare code): from $157.29 to $3,198.30, with a median of $2,529.90. The lowest listed price is at Humboldt Park Health — $2,372.61 less than the median here. Across Illinois, the median is $1,979.60 at 15 hospitals.
Cash prices at 10 facilities across 9 cities for code G0121, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Apr 1, 2026 and Sep 1, 2026.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Chicago-Naperville-Elgin, IL-IN.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Humboldt Park Health lowest Chicago, IL · (773) 292-8200 COLORECTAL CANCER SCREENING; COLONOSCOPY ON INDIVIDUAL NOT MEETING CRITERIA FOR HIGH RISK | $157.29 | $561.75 | $561.75 | 72% | Aug 24, 2026 source file |
| Saint Francis Hospital Evanston, IL · (847) 316-4000 HC COLORECTAL CANCER SCRN, COLONOSCOPY NOT HIGH RISK - G0121 - 75000071 | $991.00 | $13,712.00 | $184.13–$11,380.96 | 93% | Sep 1, 2026 source file |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Colon Ca Scrn Not Hi Rsk Ind | $1,979.60 | $2,828.00 | $517.52–$2,828.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Colon Ca Scrn Not Hi Rsk Ind | $2,146.20 | $3,066.00 | $582.54–$3,066.00 | 30% | Apr 1, 2026 source file |
| The University of Chicago Medical Center Chicago, IL · (773) 702-9785 Hc Colorectal Cancer Screeningl Colonoscpy On Individual Not Meeting Criteria For High Risk-Pbb | $2,502.00 | $2,502.00 | — | — | Apr 1, 2026 source file |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Colon Ca Scrn Not Hi Rsk Ind | $2,557.80 | $3,654.00 | $705.22–$3,654.00 | 30% | Apr 1, 2026 source file |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Colon Ca Scrn Not Hi Rsk Ind | $2,557.80 | $3,654.00 | $606.56–$3,654.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Colon Ca Scrn Not Hi Rsk Ind | $2,878.40 | $4,112.00 | $612.69–$4,112.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Colon Ca Scrn Not Hi Rsk Ind | $2,878.40 | $4,112.00 | $283.73–$4,112.00 | 30% | Apr 1, 2026 source file |
| The University of Chicago Medical Center Chicago, IL · (773) 702-9785 Colorectal Ca Screen Avg-Risk-Pbb | $2,939.00 | $2,939.00 | — | — | Apr 1, 2026 source file |
| The University of Chicago Medical Center Chicago, IL · (773) 702-9785 Colorectal Ca Screen Avg-Risk-Gast | $2,939.00 | $2,939.00 | — | — | Apr 1, 2026 source file |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Colon Ca Scrn Not Hi Rsk Ind | $3,198.30 | $4,569.00 | $731.04–$4,569.00 | 30% | Apr 1, 2026 source file |
| The University of Chicago Medical Center Chicago, IL · (773) 702-9785 Hc Colorectal Cancer Screeningl Colonoscpy On Individual Not Meeting Criteria For High Risk | $5,441.00 | $5,441.00 | — | — | Apr 1, 2026 source file |
Outpatient: lowest $157.29, median $2,529.90, highest $3,198.30 — a 20.3× difference within the same market.
As an inpatient, the same code is billed by 1 facility here, median $2,502.00. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.
Cash or insurance?
At 9 of 9 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 1 it is below every plan's rate. If you have insurance but have not met your deductible, you usually pay your plan's negotiated rate, which falls somewhere in the "Insurers pay" column. Paying cash can cost less, but a cash payment usually does not count toward your deductible. Ask the hospital for both numbers before you book.
What it is
This is a routine colonoscopy for someone with no symptoms and no high-risk factors, done to find and prevent colorectal cancer. G0121 is a Medicare screening code; for people at average risk Medicare covers it once every 10 years, or 4 years after a screening sigmoidoscopy.
What the price covers
The facility price usually covers the procedure room and recovery. The gastroenterologist, anesthesia, the bowel-prep medicine and any pathology are usually billed or bought separately.