Sinus surgery, maxillary cost in Chicago, IL
In Chicago-Naperville-Elgin, IL-IN, 12 hospitals list a cash price for endoscopic sinus surgery: opening the maxillary (cheek) sinus: from $195.80 to $43,224.04, with a median of $6,350.24. The lowest listed price is at Humboldt Park Health — $6,154.44 less than the median here. Across Illinois, the median is $3,975.00 at 13 hospitals.
- The median here, $6,350.24, is 43% above the US median of $4,453.50.
- 1 of 12 hospitals list a cash price equal to their full list price, with no self-pay discount.
Cash prices at 12 facilities across 10 cities for code 31256, as an outpatient — the setting a self-pay patient normally buys. Collected Oct 26, 2026; the hospital files themselves were last updated between Jan 1, 2026 and Sep 29, 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 |
|---|---|---|---|---|
| Humboldt Park Health lowest Chicago, IL · (773) 292-8200 Incision of nasal sinus using an endoscope File of Sep 29, 2026 · source file | $195.80 | $699.30 | $230.77–$734.27 | 72% |
| John H. Stroger, Jr. Hospital Chicago, IL · (312) 864-6000 PF-EXPLORATION MAXILLARY SINUS File of Apr 1, 2026 · source file | $301.70 | $431.00 | $237.56–$352.36 | 30% |
| Saint Joseph Medical Center - Joliet Joliet, IL · (815) 725-7133 EXPLORATION MAXILLARY SINUS File of Sep 1, 2026 · source file | $3,975.00 | $3,490.68 | $165.44–$3,490.68 | -14% |
| Saint Francis Hospital Evanston, IL · (847) 316-4000 EXPLORATION MAXILLARY SINUS File of Sep 1, 2026 · source file | $3,975.00 | $7,206.00 | $172.14–$7,206.00 | 45% |
| Mercy Medical Center Aurora, IL · (630) 859-2222 EXPLORATION MAXILLARY SINUS File of Sep 1, 2026 · source file | $3,975.00 | $8,618.70 | $165.44–$8,618.70 | 54% |
| Northwestern Memorial Hospital Chicago, IL · (312) 926-2000 HB Nasal/Sinus Endoscopy W/Maxillary Antrostomy File of Apr 1, 2026 · source file | $4,890.20 | $6,986.00 | $1,634.72–$3,842.30 | 30% |
| John H. Stroger, Jr. Hospital Chicago, IL · (312) 864-6000 EXPLORE MAXILLARY SINUS File of Apr 1, 2026 · source file | $6,666.10 | $9,523.00 | $147.69–$7,618.40 | 30% |
| Franciscan Health Dyer Dyer, IN · (219) 865-2141 Nasal/Sinus Endoscopy W/Maxillary Antrostomy File of Jan 1, 2026 · source file | $7,810.27 | $28,926.93 | $1,905.42–$23,779.90 | 73% |
| Franciscan Health Crown Point Crown Point, IN · (219) 757-6100 Nasal/Sinus Endoscopy W/Maxillary Antrostomy File of Jan 1, 2026 · source file | $8,675.82 | $33,627.21 | $33,627.21–$41,821.53 | 74% |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Nasal/Sinus Endoscopy W/Maxillary Antrostomy File of Apr 1, 2026 · source file | $26,209.15 | $37,441.64 | — | 30% |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Nasal/Sinus Endoscopy W/Maxillary Antrostomy File of Apr 1, 2026 · source file | $41,015.20 | $58,593.14 | $4,551.00–$6,846.00 | 30% |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Nasal/Sinus Endoscopy W/Maxillary Antrostomy File of Apr 1, 2026 · source file | $41,262.50 | $58,946.43 | $5,365.50–$5,962.50 | 30% |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Nasal/Sinus Endoscopy W/Maxillary Antrostomy File of Apr 1, 2026 · source file | $43,224.04 | $61,748.63 | — | 30% |
Outpatient: lowest $195.80, median $6,350.24, highest $43,224.04 — a 220.8× difference within the same market.
As an inpatient, the same code is billed by 1 facility here, median $301.70. 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 6 of 10 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 2 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 sinus surgery, maxillary is, what the price covers and why prices differ: Sinus surgery, maxillary explained.