Medicare covers the eye exam that diagnoses a cataract, but not routine eye exams for glasses or contacts

Medicare Part B covers an eye exam performed by an ophthalmologist or optometrist when you have symptoms of a cataract — blurred vision, glare sensitivity, or dimming sight. This is called a diagnostic eye exam and is covered because it checks for disease, not just your prescription. You pay 20% of the cost after you meet your Part B deductible; Medicare pays 80%.

Medicare does not cover routine eye exams for the purpose of getting glasses or contact lenses. If you want an exam only to update your prescription, you pay the full cost yourself. The difference matters: a diagnostic exam for a cataract is medically necessary; a refraction exam for vision correction is not.

If your eye doctor finds a cataract during a diagnostic exam, the exam itself is covered. Any follow-up imaging or testing to measure the cataract's density is also covered as part of the diagnostic workup.

Key Takeaways

  • Medicare Part B covers an eye exam when you have cataract symptoms like blurred vision or glare, and you pay 20% after your deductible.
  • Routine eye exams for glasses or contacts are not covered by Medicare, and you pay the full cost yourself.
  • Cataract surgery itself is covered by Medicare Part B when medically necessary, with you paying 20% of the cost after your deductible.
  • You do not need a referral to see an eye doctor, but make sure they accept Medicare assignment to get the 80/20 coverage.
  • If you have a Medigap or Medicare Advantage plan, your out-of-pocket costs may be lower than standard Part B coverage.

How Medicare decides if an eye exam is covered

Medicare covers an eye exam only when there is a medical reason — a symptom or sign of disease. A cataract causes real symptoms: your vision becomes cloudy or blurred, bright light causes glare or halos, or colors appear faded. If you go to an eye doctor because you are having these problems, the exam to investigate them is covered.

If you go for an eye exam because you want to update your glasses prescription or because it has been a while since your last checkup, that exam is not covered. Medicare calls this a "routine" or "refractive" exam, and it is your responsibility to pay. The eye doctor's office should tell you before the visit whether they are billing it as diagnostic or routine.

Once a cataract is diagnosed, follow-up exams to monitor how it is progressing are also covered, as long as they are medically necessary. Your eye doctor decides whether monitoring is needed based on your symptoms and how much the cataract is affecting your vision.

What happens after a cataract is diagnosed

If the exam shows you have a cataract, your eye doctor will discuss whether surgery is the right choice. You do not have to have surgery when ready. Many people live with a cataract for months or years if it is not affecting their daily life much. Surgery becomes medically necessary when the cataract interferes with your ability to see well enough to do the things you need to do.

Medicare Part B covers cataract surgery when it is medically necessary. The surgery itself, the intraocular lens implant, and the pre-surgery testing are all covered. You pay 20% of the approved amount after your Part B deductible. If you choose a premium lens — one that corrects astigmatism or allows you to see at multiple distances — Medicare covers only the cost of a standard lens, and you pay the difference out of pocket.

Before surgery, your eye doctor will do measurements and imaging to plan the procedure. These tests are covered as part of the surgical workup. After surgery, follow-up visits to check your healing are covered as well.

Your costs under different Medicare plans

Under Original Medicare (Part A and Part B), you pay 20% of the approved amount for the eye exam and any cataract surgery after you meet your Part B deductible. The deductible is the same amount each year, and once you meet it, you pay 20% for the rest of the year. Your eye doctor's office can tell you what the approved amount is before your visit.

If you have a Medigap policy, it may cover some or all of your 20% coinsurance, depending on which plan you have. Plans C, D, F, and G typically cover the Part B coinsurance, so you would pay little or nothing out of pocket. Check your policy documents or call your Medigap insurer to confirm what is covered.

If you have a Medicare Advantage plan, your coverage and costs are different. Most Advantage plans cover cataract exams and surgery, but your copay or coinsurance may be higher or lower than Original Medicare. Some plans require you to use in-network eye doctors. Check your plan documents or call the plan to find out your exact costs before you schedule an exam.

Finding an eye doctor who accepts Medicare

You can see any ophthalmologist or optometrist who accepts Medicare. You do not need a referral from your primary care doctor. To find doctors in your area, use the Medicare provider search tool at Medicare.gov, or call 1-800-MEDICARE and ask for a list of eye doctors near you.

When you call to schedule an appointment, tell the office staff that you have Medicare and ask if they accept Medicare assignment. Assignment means the doctor agrees to accept Medicare's approved amount as payment in full for covered services. If they accept assignment, you pay only your 20% coinsurance (after your deductible). If they do not accept assignment, they can charge you more, and you may have to pay the difference yourself.

Bring your Medicare card to your appointment. The office will need your card number and information to bill Medicare correctly.

What to tell your eye doctor before your visit

When you call to schedule, mention any vision problems you have been noticing — blurred vision, glare, difficulty seeing at night, or colors looking faded. This helps the office staff know to schedule a diagnostic exam rather than a routine one. If you are unsure whether your symptoms warrant a covered exam, ask the office directly.

If you have had cataract surgery in the other eye, tell them that too. It helps your doctor understand your situation and may affect how they approach the exam.

Bring a list of all your medications and any other eye conditions you have, such as glaucoma or macular degeneration. These can affect how a cataract is managed and what surgery options are best for you.

When to seek care for eye symptoms

Schedule an eye exam if you notice gradual blurring of your vision, increasing difficulty with night driving, or halos around lights. These are common cataract symptoms. You do not need to wait for symptoms to get worse; an early diagnosis helps you and your doctor plan ahead.

Seek urgent care if you have sudden vision loss, eye pain, or flashing lights and floaters. These can be signs of other serious eye conditions that need when ready attention. Go to an emergency room or urgent care center, or call your eye doctor right away if you cannot reach them.

If you have already had cataract surgery and notice new vision problems in that eye, contact your eye doctor. Sometimes the lens can become cloudy again months or years after surgery, a condition called posterior capsular opacification. This is treatable with a quick laser procedure that is also covered by Medicare.

Frequently Asked Questions

Do I need to see a specific type of eye doctor for Medicare to cover the exam?

No. Medicare covers eye exams performed by an ophthalmologist (a medical doctor who specializes in eye care) or an optometrist (a licensed eye care professional). Both can diagnose cataracts and perform the diagnostic exam. Make sure whoever you see accepts Medicare assignment.

Will Medicare cover the cost of glasses after cataract surgery?

Medicare does not cover eyeglasses or contact lenses, even after cataract surgery. However, after surgery you are allowed one pair of glasses or contact lenses covered by insurance if you have Medicaid or certain other coverage. Check with your specific plan. Many people find that their vision improves enough after surgery that they need a weaker prescription or no glasses at all.

What if my eye doctor says I do not need cataract surgery yet?

That is common. Many cataracts progress slowly, and surgery is not necessary unless the cataract is affecting your daily life. Your doctor will monitor the cataract with follow-up exams, which are covered by Medicare as long as they are medically necessary. You can have surgery whenever you and your doctor decide it is the right time.

Can I get a second opinion on cataract surgery covered by Medicare?

Yes. You can see another eye doctor for a second opinion, and that visit is covered by Medicare if it is for the same medical reason — evaluating your cataract. You do not need permission from Medicare or your primary care doctor. Just make sure the second doctor accepts Medicare assignment.

What if I have both Medicare and Medicaid?

Medicaid may cover routine eye exams and glasses that Medicare does not. The rules vary by state. Contact your state Medicaid office or your Medicaid managed care plan to find out what eye care is covered under your Medicaid benefit.