Knee replacement cost in Chicago, IL
In Chicago-Naperville-Elgin, IL-IN, 13 hospitals list a cash price for total knee replacement: from $1,565.55 to $42,436.03, with a median of $15,156.91. The lowest listed price is at Humboldt Park Health — $13,591.36 less than the median here. Across Illinois, the median is $11,561.00 at 14 hospitals.
- The median here, $15,156.91, is about the same as the US median of $15,247.33.
- Every hospital here lists a cash price below its full list price.
Cash prices at 13 facilities across 10 cities for code 27447, as an outpatient — the setting a self-pay patient normally buys. Collected Oct 31, 2026; the hospital files themselves were last updated between Dec 26, 2025 and Oct 27, 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 Replacement of knee joint, both sides of knee File of Sep 29, 2026 · source file | $1,565.55 | $5,591.25 | $1,845.11–$5,870.81 | 72% |
| John H. Stroger, Jr. Hospital Chicago, IL · (312) 864-6000 PF-TOTAL KNEE ARTHROPLASTY File of Apr 1, 2026 · source file | $2,345.00 | $3,350.00 | $1,285.03–$2,680.00 | 30% |
| Morris Hospital Morris, IL · (815) 942-2932 Replacement of knee joint, both sides of knee File of Oct 27, 2026 · source file | $3,012.07 | $12,519.00 | $4,882.41–$12,894.57 | 76% |
| Saint Joseph Medical Center - Joliet Joliet, IL · (815) 725-7133 Total knee arthroplasty File of Sep 1, 2026 · source file | $13,690.00 | $25,399.00 | $1,277.91–$25,399.00 | 46% |
| Saint Francis Hospital Evanston, IL · (847) 316-4000 Total knee arthroplasty File of Sep 1, 2026 · source file | $13,690.00 | $40,674.00 | $1,339.63–$33,759.42 | 66% |
| Mercy Medical Center Aurora, IL · (630) 859-2222 Total knee arthroplasty File of Sep 1, 2026 · source file | $13,690.00 | $48,304.00 | $1,277.91–$48,304.00 | 72% |
| Franciscan Health Munster Munster, IN · (219) 922-4200 Arthrp Kne Condyle&Platu Medial&Lat Compartments File of Jan 1, 2026 · source file | $15,156.91 | $71,159.19 | $13,583.45–$49,765.00 | 79% |
| Franciscan Health Dyer Dyer, IN · (219) 865-2141 Arthrp Kne Condyle&Platu Medial&Lat Compartments File of Jan 1, 2026 · source file | $15,623.03 | $57,863.08 | $13,583.45–$43,259.56 | 73% |
| Franciscan Health Crown Point Crown Point, IN · (219) 757-6100 Arthrp Kne Condyle&Platu Medial&Lat Compartments File of Jan 1, 2026 · source file | $17,997.01 | $69,755.85 | $69,755.85–$97,582.96 | 74% |
| Jackson Park Hospital Foundation Chicago, IL · (773) 947-7500 TOTAL KNEE ARTHROPLASTY File of Dec 26, 2025 · source file | $21,558.39 | $26,947.99 | — | 20% |
| Northwestern Memorial Hospital Chicago, IL · (312) 926-2000 HB Arthrp Kne Condyle&Platu Medial&Lat Compartments File of Apr 1, 2026 · source file | $34,605.90 | $49,437.00 | $11,568.26–$29,975.00 | 30% |
| Franciscan Health Rensselaer Rensselaer, IN · (219) 866-5141 Arthrp Kne Condyle&Platu Medial&Lat Compartments File of Jan 1, 2026 · source file | $37,911.88 | $105,899.10 | $26,103.48–$49,765.00 | 64% |
| Northwest Health - Porter Valparaiso, IN · (219) 983-8300 TOTAL KNEE REPLACEMENT File of Apr 1, 2026 · source file | $42,436.03 | $157,170.48 | $1,062.09–$132,023.20 | 73% |
Outpatient: lowest $1,565.55, median $15,156.91, highest $42,436.03 — a 27.1× difference within the same market.
As an inpatient, the same code is billed by 2 facilities here, median $11,951.70. 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 11 of 12 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 3 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 knee replacement is, what the price covers and why prices differ: Knee replacement explained.