Knee Replacement Cost in Illinois (2026 Price Guide)

What does a knee replacement cost in Illinois?

You could pay $3,265 or $9,155 for the same knee replacement in Illinois — depending entirely on which facility you choose. The median cash price across 62 reporting hospitals is $4,008. This data comes directly from hospital price transparency files published under federal law.

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   → Knee Replacement costs nationwide

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Lower-cost options in Illinois start around $2,377 or below. Most hospitals cluster between $2,377 and $9,155. 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: Blessing Care Corporation in Pittsfield (cash price from $2,019); Loyola University Medical Center in Maywood (cash price from $2,052); ST. FRANCIS HOSPITAL in Litchfield (cash price from $2,057). These are declared cash prices — contact each facility for a formal quote before scheduling.

Where knee replacement costs vary in Illinois

Each pin represents a hospital that filed price transparency data. Green pins are below the state cash-price average; red are above. Click any pin for facility name and price details.

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Illinois Knee Replacement 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
• Childbirth Cost in Illinois

Where you can save the most on knee replacement 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 knee replacement 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 (2) report very high prices above $19,322, which drives much of the overall price range. Excluding these, most facilities cluster in a significantly tighter band.

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)

Compare knee replacement costs in nearby states

• Wisconsin
• Iowa
• Indiana
• Missouri

Explore all knee replacement cost data

→ See knee replacement costs across all states

CostKits compiles hospital price transparency data to help families make informed decisions. If you've received a bill for this procedure:
→ Analyze your medical bill for errors
→ How to negotiate your medical bills
→ Track and manage your healthcare costs (free account)