Medicare covers cataract surgery, including the laser version, but only after your doctor determines the cataract is affecting your vision enough to interfere with daily life
Medicare Part B pays for cataract surgery when a doctor documents that the cataract is causing vision loss that limits your activities. This includes phacoemulsification (the standard surgical removal) and femtosecond laser-assisted cataract surgery (FLACS), which uses a laser to make some of the incisions and break up the lens. You pay 20% of the approved amount after you meet your Part B deductible; Medicare pays the other 80%.
The key word is "medically necessary." Medicare will not pay for cataract surgery if your vision is only slightly blurry or if you want the surgery purely for convenience. Your eye doctor must document in your medical record that the cataract is the reason your vision has declined and that surgery will meaningfully improve it.
Key Takeaways
- Medicare Part B covers both standard cataract surgery and laser-assisted cataract surgery when a doctor determines the cataract is reducing your vision enough to affect daily activities.
- You are responsible for 20% of the Medicare-approved cost after you meet your annual Part B deductible, which varies by year.
- Medicare does not cover premium intraocular lenses (IOLs) that correct astigmatism or presbyopia; you pay the difference out of pocket if you choose one.
- Your eye doctor must document that the cataract is medically necessary to remove before surgery is scheduled.
- If you have a Medigap or Medicare Advantage plan, your out-of-pocket costs may be lower than the standard 20%.
How Medicare decides whether surgery is medically necessary
Your eye doctor performs a vision test and examines the cataract with a slit lamp to measure how much it is clouding your lens. They document the results in your chart. Medicare's rule is straightforward: the cataract must be the cause of your vision loss, and removing it must have a reasonable chance of improving your sight.
You do not need to be nearly blind. Many people have cataract surgery when they can still see 20/40 or 20/50 because the cloudiness is affecting their ability to read, drive, or do their job. If your doctor says the cataract is causing your vision problem and surgery will help, Medicare will cover it. If your vision loss is from something else—macular degeneration, diabetic retinopathy, or another condition—the cataract surgery itself may still be covered, but only the cataract part of the procedure.
What you pay: the 20% rule and your deductible
After you meet your Part B deductible (the amount changes each year), Medicare pays 80% of the approved amount for the surgery. You pay 20%. The approved amount is set by Medicare, not by your surgeon's actual bill. If your surgeon charges more than Medicare approves, you may owe the difference unless you have a Medigap plan that covers it.
The 20% typically comes to several hundred dollars for cataract surgery, depending on your region and whether any complications arise during the procedure. If you have a Medigap plan (supplemental insurance), it usually covers the 20% coinsurance. If you have a Medicare Advantage plan, your costs depend on your plan's rules—some charge a copay instead of coinsurance, and some have an out-of-pocket maximum.
Premium intraocular lenses and what Medicare does not cover
During cataract surgery, your clouded lens is removed and replaced with an artificial lens called an intraocular lens (IOL). Medicare covers a standard monofocal IOL, which corrects distance vision. You pay 20% of the cost of that standard lens.
If you choose a premium IOL—one that corrects astigmatism, allows you to see at multiple distances (multifocal), or has other advanced features—Medicare does not cover the extra cost. You pay the full difference out of pocket. That difference can range from $500 to $3,000 per eye, depending on the lens. Ask your surgeon for the exact cost before surgery so you can decide whether the premium lens is worth it to you.
Laser-assisted surgery versus standard surgery
Femtosecond laser-assisted cataract surgery (FLACS) uses a laser to create the corneal incisions and soften the cataract before removal. Some surgeons say it is more precise; others say the difference in outcomes is small. Both standard phacoemulsification and FLACS are covered by Medicare at the same rate.
Your surgeon may recommend one method over the other based on your eye anatomy or the density of your cataract. If your surgeon recommends FLACS, ask whether it is medically necessary for your case or whether it is an optional upgrade. If it is optional, Medicare will still cover the standard portion, but you may have an extra charge for the laser component. Get the cost in writing before you agree to the procedure.
What to do before scheduling surgery
Ask your eye doctor to confirm in writing that your cataract is medically necessary to remove. This is not a formal Medicare approval—your doctor does not need to call Medicare first—but it is the documentation that justifies the surgery if questions come up later.
Call your Medicare plan (the number is on your card) and ask what your out-of-pocket cost will be. Tell them the procedure code (usually 66984 for phacoemulsification) and ask whether you have met your deductible for the year. If you have a Medigap or Medicare Advantage plan, ask what they cover. Get a cost estimate from your surgeon's office as well, because the actual bill may differ from Medicare's approved amount.
Schedule the surgery at a facility that accepts Medicare assignment, meaning they agree to accept Medicare's approved amount as payment in full (except for your 20% coinsurance). Most hospitals and surgery centers do, but ask to be sure.
Both eyes and timing
If you need cataract surgery on both eyes, Medicare covers both. Surgeons typically operate on one eye first, wait a week or two for it to heal, then operate on the other. Each surgery is billed separately, so you will pay the 20% coinsurance twice (unless you have already met your out-of-pocket maximum under a Medicare Advantage plan).
Cataract surgery is not urgent unless the cataract is causing other problems, like angle-closure glaucoma. If your doctor recommends waiting, that is usually fine. If you are considering surgery, schedule it before the end of the year if you have not yet met your Part B deductible, because the deductible resets on January 1.
Frequently Asked Questions
Do I need Medicare approval before I schedule cataract surgery?
No. Your eye doctor decides whether the cataract is medically necessary; Medicare does not require advance approval. Your surgeon's office will submit the claim after surgery, and Medicare will pay its share if the documentation supports it. You do not need to call Medicare first.
What if my surgeon says I need laser-assisted surgery but Medicare only covers standard surgery?
Medicare covers both at the same rate. If your surgeon recommends FLACS because your eye anatomy requires it, that is covered. If they recommend it as an optional upgrade for better precision, ask for the cost of the laser component in writing. You can choose standard surgery instead and pay nothing extra, or pay the difference for the laser.
Will my Medigap plan cover the 20% coinsurance?
Most Medigap plans cover the 20% coinsurance for cataract surgery, but not all do. Check your plan documents or call your Medigap insurer to confirm. If you have a Medicare Advantage plan instead, the coverage rules are different—call your plan to find out what you will owe.
Can I get a premium IOL and have Medicare pay for part of it?
No. Medicare covers only the standard monofocal IOL. If you choose a premium lens, you pay the entire difference between the standard lens cost and the premium lens cost out of pocket. Ask your surgeon for the exact amount before surgery.
What happens if my cataract surgery causes complications?
Complications like infection or swelling are still covered by Medicare as part of the surgical care. You pay your 20% coinsurance on any additional treatment needed. If the complication requires a second surgery, that is billed separately, and you may owe another 20% coinsurance unless you have met your out-of-pocket maximum.