Does insurance cover ACL surgery? In most cases, yes. Employer plans, ACA marketplace plans, Medicare, and Medicaid all cover ACL reconstruction when a doctor documents that it’s medically necessary. What varies is how much you’ll pay before and alongside that coverage. ACL surgery averages around $35,000 before insurance, and the full bill with rehabilitation can reach $50,000 or more. For 2026, an ACA-compliant plan can require you to pay no more than $10,600 out of pocket for individual coverage or $21,200 for a family plan.
What Coverage Actually Includes
When an insurer approves ACL reconstruction, coverage typically extends to the core components of the procedure: the surgeon’s fee, anesthesia, the operating room and facility charges, and necessary surgical materials like grafts and fixation hardware. Pre-surgical imaging and lab work ordered as part of the surgical workup are generally covered too.
Post-operative equipment is where coverage gets spottier. Knee braces, crutches, and continuous passive motion machines usually qualify as durable medical equipment, but your plan may require a separate prescription or prior authorization for each item. Medicare covers CPM machines for up to 21 days of home use after knee surgery.1Medicare.gov. Continuous Passive Motion Machines Private plans vary. Check your plan’s DME benefit before surgery so the cost of a $200 knee brace doesn’t catch you off guard.
One thing that trips people up: your plan may cover the surgery but only reimburse fully when every provider involved is in-network. Confirm that the surgeon, the anesthesiologist, and the facility are all in-network before your surgery date.
Physical Therapy After Surgery
ACL rehabilitation is not optional. The surgery rebuilds the ligament, but without months of structured physical therapy, the knee won’t regain full strength and range of motion. A typical rehab protocol runs five to six phases over at least six months.
Most ACA-compliant plans cover physical therapy as a rehabilitative service, but the catch is visit limits. Roughly four out of five ACA marketplace plans cap the number of sessions per year, with limits commonly ranging from 20 to 60 visits. The most frequent cap is 20 sessions. Employer-sponsored plans often set similar limits of 20 or 30 sessions. Those numbers can fall short of what ACL recovery demands, especially if you’re attending therapy two or three times per week in the early months.
If you hit your plan’s visit limit before your surgeon says you’re done, your provider can request additional sessions by documenting continued medical necessity. Insurers want to see measurable progress that would stall without more therapy, and many will authorize more visits when the records show it. Medicare beneficiaries don’t face this problem. Medicare has no annual dollar cap on medically necessary outpatient therapy.2Medicare.gov. Physical Therapy Services
Prior Authorization and Medical Necessity
Most insurers won’t pay for ACL surgery without prior authorization. Your orthopedic surgeon typically handles the submission, providing MRI results, clinical exam findings, and documentation showing that conservative treatments haven’t restored knee stability.
Approval hinges on medical necessity, and insurers evaluate this using clinical guidelines from organizations like the American Academy of Orthopaedic Surgeons, which publishes evidence-based recommendations for managing ACL injuries.3American Academy of Orthopaedic Surgeons. Management of Anterior Cruciate Ligament Injuries Evidence-Based Clinical Practice Guideline The factors that matter most are the severity of the tear, how much instability it causes during daily activities, and whether your overall health makes you a reasonable surgical candidate. Younger, more active patients tend to get approval more readily because an untreated ACL tear in someone who needs to stay active will predictably lead to further knee damage.
Denials usually trace back to one of two problems: incomplete documentation or insufficient evidence that non-surgical options failed. Ask your surgeon’s office what specific documentation they’re submitting, and make sure your history of conservative treatment attempts is thoroughly recorded in your medical chart before the authorization request goes out.
How Each Type of Plan Handles ACL Surgery
Employer-Sponsored and ACA Marketplace Plans
Employer-sponsored plans and individual plans purchased through the ACA marketplace generally cover ACL surgery when it’s medically necessary. The Affordable Care Act requires non-grandfathered plans in the individual and small group markets to cover ten categories of essential health benefits, including hospitalization, ambulatory patient services, and rehabilitative services and devices.4Centers for Medicare & Medicaid Services. Information on Essential Health Benefits Benchmark Plans ACL reconstruction and the physical therapy that follows both fall squarely within those categories.
The real difference between plans isn’t whether they pay for the surgery. It’s how much they make you pay first. A plan with a $500 deductible and 10% coinsurance treats your wallet very differently than a plan with a $3,400 deductible and 30% coinsurance, even though both cover the same procedure.
High-Deductible Health Plans
High-deductible health plans require you to pay more upfront before coverage starts.5HealthCare.gov. Understanding Health Savings Account-Eligible Plans For 2026, the IRS defines an HDHP as any plan with a deductible of at least $1,700 for self-only coverage or $3,400 for family coverage, with out-of-pocket expenses capped at $8,500 (self-only) or $17,000 (family).6Internal Revenue Service. Revenue Procedure 2025-19 If you’re on an HDHP and need ACL surgery, you could owe the full deductible before your plan pays anything toward the procedure.
The tradeoff is that HDHPs let you open a Health Savings Account. For 2026, you can contribute up to $4,400 for self-only coverage or $8,750 for family coverage, and people 55 and older can add another $1,000.6Internal Revenue Service. Revenue Procedure 2025-19 HSA funds roll over year to year, so steady contributions can build a meaningful cushion by the time a big expense hits.
Medicare
Medicare covers ACL surgery, with the specific part depending on where the procedure happens. For outpatient surgery at an ambulatory surgical center, Part B covers the surgeon’s services, and you pay 20% of the Medicare-approved amount after meeting the Part B deductible.7Medicare.gov. Outpatient Medical and Surgical Services and Supplies If the procedure requires a hospital stay, Part A picks up the inpatient costs, though you’ll still owe the inpatient deductible and any applicable coinsurance. Post-surgical equipment like continuous passive motion machines qualifies as durable medical equipment under Part B when your doctor prescribes it for home use, with the standard 20% coinsurance after the deductible.1Medicare.gov. Continuous Passive Motion Machines
Medicaid
Medicaid covers ACL surgery, but the process varies by state. State Medicaid agencies and managed care organizations have flexibility to decide which services require prior authorization before they’ll approve payment.8Medicaid and CHIP Payment and Access Commission. Prior Authorization in Medicaid Some states use step therapy requirements, meaning you may need to document that conservative treatments like physical therapy or bracing didn’t resolve the instability before surgery gets approved.
Short-Term Health Insurance
Short-term health insurance plans are not required to follow ACA guidelines and frequently exclude or sharply limit coverage for major surgical procedures. These plans are designed as temporary stopgaps, and uncovered services leave you responsible for the entire bill. Check the exclusions and limitations section of any short-term plan before assuming it will cover something as expensive as ACL reconstruction.
What You’ll Pay Out of Pocket
Even with good insurance, ACL surgery will cost you something. Your total exposure depends on three numbers in your plan: the deductible, the coinsurance percentage, and the out-of-pocket maximum.
The deductible is the amount you pay before insurance starts covering costs. Coinsurance is your percentage share after the deductible is met, commonly 10% to 30% of each covered expense.9HealthCare.gov. Your Total Costs for Health Care – Premium, Deductible, and Out-of-Pocket Costs The out-of-pocket maximum is your ceiling. Once you’ve paid that much in deductibles, coinsurance, and copays during the plan year, the insurer covers 100% of remaining in-network costs. For 2026, ACA marketplace plans cap the out-of-pocket maximum at $10,600 for individual coverage and $21,200 for family coverage.10HealthCare.gov. Out-of-Pocket Maximum/Limit
A rough example. If your plan has a $2,000 deductible and 20% coinsurance, and the surgery plus rehabilitation totals $40,000, you’d pay the first $2,000, then 20% of the remaining $38,000 ($7,600), for a total of $9,600. But if your out-of-pocket maximum is $8,500, your costs stop there. Knowing your out-of-pocket max matters more than knowing the sticker price of the surgery, because it’s your worst-case scenario for in-network care.
Facility choice also matters. Hospital-based surgery typically costs more than an outpatient surgical center, and some plans reimburse at different rates depending on the setting. If your surgeon operates at both a hospital and a freestanding surgical center, asking about the cost difference is worth the phone call.
Surprise Bills and the No Surprises Act
Balance billing happens when an out-of-network provider charges you the difference between their rate and what your insurance paid. This used to be a serious risk during ACL surgery. You’d choose an in-network surgeon and facility, only to find that the anesthesiologist was out of network and is now billing you separately for thousands of dollars.
The No Surprises Act significantly limits this. Under the law, out-of-network providers at in-network facilities generally cannot balance bill you for non-emergency services, and the prohibition specifically covers ancillary providers like anesthesiologists, radiologists, and assistant surgeons.11U.S. Department of Labor. Avoid Surprise Healthcare Expenses – How the No Surprises Act Can Protect You Your cost sharing for these services must be calculated as if the provider were in-network, and those payments count toward your in-network deductible and out-of-pocket maximum.12Centers for Medicare & Medicaid Services. No Surprises – Understand Your Rights Against Surprise Medical Bills
There is a narrow exception. For scheduled non-emergency services, an out-of-network provider can ask you to sign a notice and consent form waiving these protections at least 72 hours before the procedure. But this exception doesn’t apply to ancillary services like anesthesiology, so the most common source of surprise bills from ACL surgery remains protected even if you sign a waiver for the primary surgeon.
When Another Insurer Pays Instead
Workers’ Compensation
If you tore your ACL at work or during a work-related activity, workers’ compensation, not your health insurance, is typically the primary payer. Workers’ comp generally covers all reasonable and necessary medical treatment for a work-related injury, including surgery, hospital stays, physical therapy, prescription medications, and equipment like knee braces and crutches. You usually owe nothing out of pocket for covered medical expenses. Workers’ comp also provides partial wage replacement while you recover, typically around two-thirds of your pre-injury average weekly wage, though the exact percentage and duration vary by state.
Auto Insurance
If your ACL tear resulted from a car accident, your auto insurance may help cover medical costs before your health insurance gets involved. Personal injury protection and medical payments coverage both pay for medical and surgical expenses from an auto accident. The coverage limits are often modest compared to the full cost of ACL reconstruction, but they can help cover deductibles and coinsurance that your health plan won’t pay. Check your auto policy or call your agent to find out whether you carry either type of coverage and what the limits are.
If Your Claim Is Denied
A denial doesn’t mean the final answer is no. Insurers deny claims for reasons that are often fixable: missing documentation, incorrect billing codes, or a determination that the procedure wasn’t medically necessary based on the records submitted. The denial letter will state the specific reason, and that reason tells you exactly what to address in your appeal.
You have the right to file an internal appeal within 180 days of receiving the denial notice.13HealthCare.gov. Appealing a Health Plan Decision – Internal Appeals For medical necessity denials, the most effective approach is having your surgeon write a detailed letter explaining why surgery is the appropriate treatment and attaching any clinical evidence the original submission lacked. Some plans use peer-to-peer reviews at this stage, where your surgeon speaks directly with the insurer’s medical director to make the case.
If the internal appeal fails, you can request an external review, where an independent review organization evaluates the case and issues a binding decision.14Centers for Medicare & Medicaid Services. Internal Claims and Appeals and the External Review Process Overview External reviewers are not employed by your insurer, and they overturn denials more often than people expect. Many states also run consumer assistance programs that can help you navigate the appeals process at no cost.
If all appeals are exhausted and the denial stands, you still have options. Many surgical facilities offer payment plans or financial hardship programs. Asking the billing department for an itemized bill and negotiating the total, particularly if you’re paying cash, can reduce the amount significantly. Hospitals and surgical centers are often more willing to negotiate than people assume, especially when the alternative is sending the account to collections.