Medicare Part B covers cataract surgery when your doctor says it is medically necessary

Yes. Medicare Part B pays for cataract surgery if your eye doctor documents that the cataract is affecting your vision enough to interfere with daily life. You do not need to wait until your vision is severely damaged — Medicare covers the surgery once it is causing functional problems, such as difficulty reading, driving, or recognizing faces.

Medicare pays for the surgeon's fee, the facility cost, and the intraocular lens (the artificial lens implanted during surgery). You will pay your Part B deductible first, then 20 percent of the approved amount after that. If you have a Medigap or Medicare Advantage plan, your out-of-pocket cost may be lower.

The surgery itself is typically done as an outpatient procedure at a hospital or surgical center. Recovery takes a few weeks, and your vision gradually improves during that time.

Key Takeaways

  • Medicare Part B covers cataract surgery when your eye doctor confirms the cataract is reducing your vision in a way that affects your daily activities.
  • You pay your Part B deductible (currently $240 per year) and then 20 percent of the approved surgical cost; the exact amount depends on your location and provider.
  • The surgery includes the surgeon's fee, facility use, and the intraocular lens implant, all covered under Part B.
  • Your eye doctor must document medical necessity in your chart; Medicare will not cover surgery purely for cosmetic reasons or if your vision loss is mild.
  • If you have a Medigap plan (such as Plan C or Plan F), it typically covers your 20 percent coinsurance, reducing your out-of-pocket cost to just the deductible.

What Medicare considers medically necessary for cataract surgery

Medicare uses a straightforward standard: the cataract must be causing vision loss that interferes with your ability to perform normal daily tasks. Your eye doctor will measure your visual acuity and document how the cataract affects activities like reading, watching television, driving, cooking, or managing medications. If your vision is 20/40 or worse in the affected eye and the cataract is the cause, Medicare will cover the surgery.

You do not have to try eyeglasses or contact lenses first. If your eye doctor determines that a new prescription will not restore functional vision because of the cataract, surgery can be covered without that step. However, your doctor must document this reasoning in your medical record.

Medicare will not cover cataract surgery if the cataract is present but not causing functional vision loss, even if you want the surgery for other reasons. Similarly, if you have other eye conditions (such as macular degeneration or diabetic retinopathy) that are the main cause of your vision problems, Medicare may deny the claim if the cataract alone is not responsible for the loss.

How much you will pay out of pocket

Your cost depends on whether you have Original Medicare alone, a Medigap plan, or a Medicare Advantage plan. With Original Medicare Part B, you pay your annual deductible ($240 in 2024, though this amount changes yearly) and then 20 percent of the Medicare-approved amount for the surgery. The approved amount varies by geographic region and the specific facility, but typically ranges from $3,000 to $4,500 for the entire procedure.

If you have a Medigap plan (supplemental insurance), the plan you chose determines how much of that 20 percent coinsurance is covered. Plans C, D, F, and G typically cover the full 20 percent coinsurance, leaving you responsible only for the deductible. Plans A and B cover less. Check your Medigap policy documents or call your insurer to confirm what your plan covers for surgical procedures.

If you have a Medicare Advantage plan, your out-of-pocket cost is set by your plan and may be lower or higher than Original Medicare. Some Advantage plans charge a copay for surgery (often $250 to $500), while others use coinsurance. You should contact your Advantage plan before scheduling surgery to learn your exact cost.

The step-by-step process for getting cataract surgery covered

Start with your primary care doctor or eye doctor. If you see an optometrist, they can refer you to an ophthalmologist (a medical doctor who specializes in eye surgery) for evaluation. The ophthalmologist will perform a comprehensive eye exam, measure your vision, and document whether the cataract meets Medicare's standard for medical necessity.

Once your ophthalmologist determines surgery is medically necessary, they will submit the claim to Medicare on your behalf. Most surgeons' offices handle this paperwork. You do not need to submit a separate request to Medicare yourself. The office will tell you whether Medicare has approved the claim and what your out-of-pocket cost will be.

Before the surgery date, you will have a pre-operative appointment where the surgeon measures your eye to determine the correct power of the intraocular lens. You will also discuss which type of lens implant you want. Medicare covers a standard monofocal lens (which corrects distance vision). If you choose a premium lens (such as a multifocal or toric lens that corrects astigmatism), you will pay the difference out of pocket — typically $500 to $2,000 per eye.

After surgery, you will have follow-up visits at one day, one week, and several weeks post-op. These visits are covered by Medicare as part of the surgical package.

What happens if Medicare denies your claim

If your surgeon submits a claim and Medicare denies it, the denial letter will explain the reason. The most common reason is that Medicare determined the cataract is not yet causing enough functional vision loss to meet their standard. In that case, you can ask your eye doctor to submit additional documentation — for example, a detailed description of how the cataract affects your daily life, or results from a visual field test.

You also have the right to appeal. You can file an appeal with Medicare within 120 days of the denial letter. Your surgeon's office can help you gather the medical records and documentation needed. If you have a Medigap or Advantage plan, you can also contact your plan's appeals department for guidance.

If the appeal is denied and you still want the surgery, you can choose to pay for it yourself. Some surgeons offer payment plans or discounts for self-pay patients. Before paying out of pocket, confirm with your surgeon that they are willing to perform the surgery and what the total cost will be.

Medicare Advantage plans and cataract surgery

Medicare Advantage plans must cover cataract surgery if it meets Medicare's medical necessity standard, but they can charge you differently than Original Medicare. Some Advantage plans require you to use surgeons within their network; if you go out of network, you may pay more or the plan may not cover the surgery at all. Check your plan's provider directory or call the plan before scheduling.

Advantage plans may also require prior authorization, meaning your surgeon must get approval from the plan before scheduling the surgery. This usually takes a few days. If your plan denies authorization, you can appeal, and your surgeon's office can provide supporting documentation.

Some Advantage plans cover premium lens implants as part of the plan benefit, while others do not. Ask your plan specifically whether multifocal or toric lenses are covered, or whether you will pay extra for them.

Frequently Asked Questions

Can I have cataract surgery on both eyes at the same time?

No. Surgeons typically operate on one eye at a time, usually waiting one to two weeks between surgeries. This allows your first eye to heal and your vision to stabilize before the second surgery. Medicare covers both surgeries, but you will pay your deductible and coinsurance for each one separately.

Does Medicare cover the cost of eyeglasses after cataract surgery?

Medicare Part B covers one pair of eyeglasses or contact lenses after cataract surgery, but only if you had the surgery covered by Medicare. You pay 20 percent of the approved amount after your deductible. The coverage is limited to one pair per eye per year, and you must obtain the glasses through a Medicare-approved supplier.

What if I have a cataract but my vision is still 20/20?

Medicare will not cover surgery if your vision is not yet affected enough to interfere with daily activities, even if a cataract is visible on examination. Your eye doctor must document that the cataract is causing functional vision loss. If your vision is good now, your doctor will monitor the cataract and discuss surgery when it begins to affect your sight.

Do I need a referral from my primary care doctor to see an eye surgeon?

No. With Medicare Part B, you can see an ophthalmologist directly without a referral. If you have a Medicare Advantage plan, check your plan documents — some Advantage plans require a referral, while others do not.

Will Medicare pay if I choose a premium lens implant?

Medicare covers the cost of a standard monofocal lens implant. If you choose a premium lens (multifocal, toric, or other advanced option), you pay the difference out of pocket. Your surgeon will tell you the additional cost before surgery. This out-of-pocket amount does not count toward your Part B deductible or out-of-pocket maximum.