Sinus surgery, full ethmoid cost in Chicago, IL
In Chicago-Naperville-Elgin, IL-IN, 11 hospitals list a cash price for endoscopic sinus surgery: full ethmoid sinus opening: from $543.20 to $45,469.83, with a median of $29,434.75. The lowest listed price is at John H. Stroger, Jr. Hospital — $28,891.55 less than the median here. Across Illinois, the median is $7,525.00 at 16 hospitals.
- The median here, $29,434.75, is 302% above the US median of $7,316.50.
- 1 of 11 hospitals list a cash price equal to their full list price, with no self-pay discount.
Cash prices at 11 facilities across 10 cities for code 31255, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 29, 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 |
|---|---|---|---|---|
| John H. Stroger, Jr. Hospital lowest Chicago, IL · (312) 864-6000 PF-REMOVAL OF ETHMOID SINUS File of Apr 1, 2026 · source file | $543.20 | $776.00 | $264.81–$620.80 | 30% |
| Northwestern Memorial Hospital Chicago, IL · (312) 926-2000 HB Nasal/Sinus Ndsc W/Total Ethoidectomy File of Apr 1, 2026 · source file | $5,358.50 | $7,655.00 | $1,791.27–$4,210.25 | 30% |
| Saint Joseph Medical Center - Joliet Joliet, IL · (815) 725-7133 NASALSINUS ENDOSCOPY SURGICAL File of Sep 1, 2026 · source file | $7,525.00 | $5,188.46 | $297.25–$5,188.46 | -45% |
| Mercy Medical Center Aurora, IL · (630) 859-2222 Nsl/sins ndsc w/tot ethmdct File of Sep 1, 2026 · source file | $7,525.00 | $28,587.00 | $297.25–$28,587.00 | 74% |
| Saint Francis Hospital Evanston, IL · (847) 316-4000 NASALSINUS ENDOSCOPY SURGICAL File of Sep 1, 2026 · source file | $7,525.00 | $9,720.00 | $310.29–$9,720.00 | 23% |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 Nasal/Sinus Ndsc W/Total Ethoidectomy File of Apr 1, 2026 · source file | $29,434.75 | $42,049.64 | $5,282.00–$5,868.00 | 30% |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 Nasal/Sinus Ndsc W/Total Ethoidectomy File of Apr 1, 2026 · source file | $30,192.25 | $43,131.79 | $2,325.00–$5,868.00 | 30% |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 Nasal/Sinus Ndsc W/Total Ethoidectomy File of Apr 1, 2026 · source file | $33,382.15 | $47,688.79 | — | 30% |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 Nasal/Sinus Ndsc W/Total Ethoidectomy File of Apr 1, 2026 · source file | $43,276.43 | $61,823.47 | $4,551.00–$5,868.00 | 30% |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 Nasal/Sinus Ndsc W/Total Ethoidectomy File of Apr 1, 2026 · source file | $44,043.97 | $62,919.96 | — | 30% |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 Nasal/Sinus Ndsc W/Total Ethoidectomy File of Apr 1, 2026 · source file | $45,469.83 | $64,956.90 | $7,923.00–$8,802.00 | 30% |
| Northwestern Memorial Hospital Chicago, IL · (312) 926-2000 Nasal/Sinus Ndsc W/Total Ethoidectomy File of Apr 1, 2026 · source file | $45,469.83 | $64,956.90 | $5,944.00–$6,604.00 | 30% |
Outpatient: lowest $543.20, median $29,434.75, highest $45,469.83 — a 83.7× difference within the same market.
As an inpatient, the same code is billed by 1 facility here, median $543.20. 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 3 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 none is it 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 sinus surgery, full ethmoid is, what the price covers and why prices differ: Sinus surgery, full ethmoid explained.