How Much Does a Knee Replacement Cost After Insurance?

Most people search "how much does a knee replacement cost" and get a number that tells them very little. The sticker price is irrelevant. What you actually pay is determined by your deductible status, your coinsurance rate, and where the procedure is performed — none of which appear on the facility's price list.

Most people overpay for a knee replacement by $200–$1,000 without realizing it — not because of billing errors, but because of facility choice and plan timing decisions made before walking in the door. This guide explains both.

Quick Answer: Typical Knee Replacement Out-of-Pocket Costs

Your out-of-pocket cost for a knee replacement falls into one of three scenarios based on where you are in your plan year.

Knee Replacement Cost With a High Deductible Plan (Deductible Not Yet Met)

When your deductible is unmet, you pay the full allowed amount — the insurer's negotiated rate, not the billed charge.

Why the variation? Facility type, geographic market, and plan-specific contract rates drive the range. The billed charge can be 3–5× the allowed amount, but you only owe cost-sharing on the allowed amount.

See the full Knee Replacement price breakdown by state on the Knee Replacement Cost Hub →

Knee Replacement Cost After Deductible

Once your deductible is met, you pay only your coinsurance share of the allowed amount.

Knee Replacement Cost With Coinsurance: How the Math Works

Coinsurance is a percentage of the allowed amount, not the billed charge.

Scenario: Your knee replacement has an allowed amount of $4,114. Your plan has 20% coinsurance and your deductible is already met.

• Allowed amount: $4,114
• Your coinsurance (20%): $823
• What insurance pays: $3,291
• What gets written off: the gap between billed charge and allowed amount (not your concern)

Your $823 counts toward your out-of-pocket maximum. If you've hit your OOP max, you owe $0.

Why Your Knee Replacement Cost Depends on Your Insurance (Not Just the Price)

The billed charge on a knee replacement is a negotiating fiction. What matters is the allowed amount, your deductible status, and your coinsurance percentage.

Allowed Amount vs. Billed Charge

• Billed charge: What the facility sends. Inflated by design.
• Allowed amount: What your insurer has agreed to pay. $2,323–$5,905 for a knee replacement.
• Write-off: The difference. The provider cannot charge you for it.
• Your share: A percentage of the allowed amount based on your plan's cost-sharing.

The EOB (Explanation of Benefits) shows all of these numbers. If you receive a bill exceeding the allowed amount for in-network care, that is a billing error you can dispute.

Deductible, Coinsurance, and Out-of-Pocket Max

Most employer plans have individual deductibles of $1,000–$3,000. A knee replacement costing $4,114 in allowed amount can fully consume a mid-range deductible in one claim. See what knee replacements actually cost in your state →

Why Two People Pay Completely Different Amounts

Two patients can receive the same knee replacement at the same facility on the same day and pay dramatically different amounts:

• Patient A: $0 left on deductible, 10% coinsurance, $4,114 allowed amount → pays $411
• Patient B: $4,114 remaining on deductible, 30% coinsurance, $5,905 allowed amount → pays $5,905

Same procedure. Different plans. This is why "how much does a knee replacement cost?" cannot be answered without your specific plan details.

How to Estimate What You'll Pay for a Knee Replacement

Step 1: Check Your Deductible Status

Log into your insurer's portal or call the member services number on your card. You need:

1. Your in-network individual deductible amount
2. How much you've already applied toward it this year

If your deductible is already met, skip to Step 3.

Step 2: Identify the Place of Service

Ask your ordering physician or the facility:

• What specific facility will perform this procedure?
• Is it billed as hospital outpatient, freestanding center, or inpatient?

This single question can change your cost-sharing by hundreds of dollars.

Step 3: Estimate Your Share

1. If deductible remaining > allowed amount → you pay the full allowed amount
2. If deductible remaining < allowed amount → you pay the remaining deductible, then coinsurance on the rest
3. If deductible fully met → you pay coinsurance % × allowed amount

Use the cost estimator at the top of this page to calculate your exact share without the manual math.

What the Numbers Look Like in Practice

Scenario: High Deductible Plan, Early in the Year

• Plan: $2,000 deductible, 20% coinsurance, $6,000 OOP max
• Knee Replacement allowed amount: $4,114
• Deductible applied so far: $0

What you pay: $4,114 (full allowed amount applies to deductible)

Scenario: Deductible Already Met

• Plan: $1,500 deductible, 20% coinsurance, $5,000 OOP max
• Knee Replacement allowed amount: $4,114
• Deductible: fully met earlier in the year

What you pay: $4,114 × 20% = $823

Same procedure. Same plan. 5× difference in what you owe based solely on when in the plan year it happens.

Outpatient ASC vs. Hospital Inpatient: The Knee Replacement Setting Shift

Knee replacement has undergone a major shift toward outpatient surgery. CMS removed total knee arthroplasty from the inpatient-only list in 2018, opening the door for ASC-based knee replacements at significantly lower cost.

Outpatient knee replacement requires medical appropriateness: generally patients who are younger, healthier, have good home support, and whose surgeons are comfortable with same-day discharge protocols. Ask your orthopedic surgeon: "Am I a candidate for outpatient knee replacement, and do you operate at an ASC?" The answer can mean $500–$1,000 difference in your out-of-pocket cost.

Before you schedule, call at least one alternative in-network facility and ask for their allowed amount with your insurer — this one call can save you hundreds. See Knee Replacement prices in your state →

Common Surprises That Increase Knee Replacement Costs

Even patients who do their homework sometimes receive bills they didn't expect.

Implant Cost-Sharing

The knee prosthesis is often billed separately from the surgical procedure, with its own cost-sharing rules. Some plans have a specific implant benefit; others roll it into the surgical benefit. Confirm your plan's implant coverage before surgery.

Multiple Provider Bills

Knee replacement generates separate bills from the facility, your orthopedic surgeon, the anesthesiologist, and potentially an assistant surgeon. All should be verified as in-network before your procedure.

Physical Therapy Adds to Total Cost

Post-operative PT typically runs 6–12 weeks, with 1–2 visits per week. At $30–$60 per visit in cost-sharing, expect $360–$1,440 in additional out-of-pocket costs for rehabilitation. Budget for this as part of your total knee replacement cost.

Should You Shop Around Before Your Knee Replacement?

Shopping is one of the highest-leverage actions you can take before a scheduled knee replacement — but only when you have time and genuine facility options.

When It Matters

Shopping is most impactful when:

• Your deductible is unmet (you pay 100% of the allowed amount — facility choice directly determines your cost)
• Both facility options are in-network with your insurer
• You have enough lead time to compare and reschedule

Knee replacement is almost always elective, giving you time to compare options. Surgeon selection determines facility options — ask your surgeon for allowed amount comparisons across their facilities before committing.

When It Doesn't

Shopping matters less when:

• Your out-of-pocket maximum is already met — you owe $0 regardless
• The clinical situation requires a specific facility or specialist
• The time to compare doesn't justify the expected savings

How Much You Can Save

In markets with multiple in-network facility options, the savings from facility selection:

• Deductible not met: $1,791–$3,582 depending on the price gap
• After deductible (20% coinsurance): $465–$1,181 per procedure

Yes — setting and surgeon selection are your primary cost levers.

Save Your Estimate and Track Your Healthcare Costs

Healthcare costs are cumulative across the year. Your knee replacement cost today affects how much you'll owe for your next procedure — once you hit your deductible, subsequent costs drop. Once you hit your OOP max, they stop entirely.

Enter your email below to save this estimate and track your deductible progress. When your next procedure comes up, you'll know exactly where you stand.

Save your estimate and track your deductible progress throughout the year — free.