Cost & Insurance

Medicare Open Enrollment Before Cataract Surgery: What to Check

If cataract surgery is likely next year, the plan you keep or pick by December 7 decides your surgeon list, your approval steps and your share of the bill.

October 30, 2026 · 9 min read · Last checked: October 30, 2026

If your eye doctor has said cataract surgery is coming, Medicare Open Enrollment (October 15 to December 7, 2026) is your last easy chance to line up coverage for 2027. Original Medicare Part B may cover the surgery with a standard lens. Medicare Advantage plans add networks and approval rules. Premium lenses cost extra no matter which you pick.

This guide walks through what to check during Open Enrollment, plan by plan, so you are not surprised in the surgeon's billing office next spring.

The dates that matter

According to Medicare.gov, Open Enrollment runs from October 15 to December 7 each year. If you switch plans, your plan must receive the request by December 7. The new coverage starts January 1 of the following year.

So any change you make this fall will govern a cataract surgery done in 2027. If your surgery is already booked for November or December 2026, your current 2026 plan pays for it regardless of what you choose now.

What Original Medicare covers for cataract surgery

Medicare.gov says Part B may cover cataract surgery that implants a conventional intraocular lens (IOL). The surgery removes the clouded natural lens and usually replaces it with an artificial one.

What you pay depends on where the surgery happens:

• Hospital outpatient department or ambulatory surgical center: after the Part B deductible, you pay 20% of the Medicare-approved amount to both the facility and the surgeon.
• Doctor's office: after the deductible, you pay 20% of the approved amount for both the lens and the surgery to implant it.

Medicare.gov lists the 2026 Part B deductible as $283 and the standard 2026 Part B premium as $202.90 a month (higher for some incomes). Medicare had not posted 2027 amounts on that page when we checked. A 2027 surgery will fall under the 2027 deductible, so watch for the update.

Your real bill also depends on any other coverage, whether the surgeon accepts assignment, the facility type and your location. Ask for an estimate that names the facility, not just the surgeon.

Glasses after surgery

Medicare usually does not pay for eyeglasses or contacts. The exception: it covers one pair of eyeglasses with standard frames, or one set of contact lenses, after each cataract surgery that implants an IOL. The coverage is for standard frames.

Premium lenses: the part you pay yourself

Many surgeons offer lenses that correct astigmatism (toric lenses) or reduce the need for reading glasses (presbyopia-correcting lenses). Medicare treats these as partly non-covered.

A 2012 CMS guidance document on CMS Rulings 05-01 and 1536-R spells out what a patient may be charged when choosing one of these lenses:

1. The portion of the facility or physician charge for the lens that exceeds the charge for a conventional IOL.
2. Extra fitting and vision testing beyond what a conventional lens requires.

The same guidance says charges for the other parts of cataract surgery, such as the incision and removing the lens, cannot be passed to the patient. That holds whether the surgeon uses traditional instruments or a laser. Medicare pays the same for the covered portion either way.

Switching plans in Open Enrollment does not make a premium lens "covered." The upgrade amount is set by the practice. Get it in writing before surgery day. Our guide to Medicare premium lens upgrade costs goes deeper on how practices quote these, and our comparison of cataract lens options explains what each lens type is designed to do.

Medicare Advantage: networks and prior authorization

Medicare Advantage plans are run by private companies and set many of their own rules. The CMS booklet Understanding Medicare Advantage Plans (April 2026) flags several that matter for surgery.

Networks

You may need to use doctors and facilities in the plan's network for non-emergency care. HMO plans generally cover only network providers, with limited exceptions. Going out of network usually costs more, if it is covered at all.

For cataract surgery, the network question has three parts: the surgeon, the surgery center or hospital, and the anesthesia provider. A surgeon can be in network while their preferred surgery center is not.

Prior authorization

The booklet notes that under Original Medicare you usually do not need approval before a service. Advantage plans may require prior authorization before they cover certain services or items. Ask the plan directly whether cataract surgery, the lens and pre-op testing need approval.

Annual out-of-pocket limit

Advantage plans have a yearly cap on what you pay for covered Part A and Part B services. Once you reach it, covered services cost you nothing for the rest of the year. Medicare.gov's plan comparison page says Original Medicare has no yearly limit on what you pay out of pocket unless you have supplemental coverage such as Medigap.

Rules change every year

Plan costs and rules can change from one year to the next. Plans send an Annual Notice of Change before Open Enrollment, typically by the end of September. If you plan surgery in 2027, read that notice for changes to your copay for outpatient surgery, your network or your authorization rules.

Medigap: the window that does not reopen each fall

Medigap is supplemental insurance from private companies that helps pay copayments, coinsurance and deductibles in Original Medicare. You can buy it only if you have Original Medicare, not with a Medicare Advantage plan.

Here is the timing trap. Your Medigap Open Enrollment Period is a one-time, six-month window. It starts the first month you have Part B and are 65 or older. Medicare.gov is explicit that it does not repeat every year.

Outside that window, an insurer can use medical underwriting. That means it may charge more, offer fewer policies or deny coverage. Some situations, called guaranteed issue rights, block that denial. Your state may add further protections, so check with your State Insurance Department.

The practical takeaway: if you leave Medicare Advantage for Original Medicare this fall to get a wider choice of surgeons, confirm that you can actually buy a Medigap policy before you count on one. Without Medigap, your 20% share under Part B has no annual cap.

Open Enrollment checklist for a 2027 cataract surgery

Work through these before December 7. Most can be done by phone with your plan and your surgeon's billing office.

1. Confirm your surgeon's participation. Ask whether the surgeon accepts Medicare assignment, or is in network for the Advantage plan you are considering for 2027.
2. Name the facility. Ask where the surgery will be done and confirm that the facility is covered and, for Advantage plans, in network.
3. Ask about prior authorization. For Advantage plans, ask the plan if cataract surgery, the lens or pre-op tests need approval, and who submits it.
4. Get a written estimate. It should separate the covered surgery from any premium lens upgrade and extra testing.
5. Check the 2027 cost-sharing. Read the Annual Notice of Change or the plan's 2027 documents for outpatient surgery copays and the out-of-pocket maximum.
6. Test your Medigap options. If switching to Original Medicare, get Medigap quotes and ask whether underwriting applies to you.
7. Plan both eyes. If both eyes need surgery, they are often done on separate dates. Check that both surgeries fall under the same plan year if that matters for your deductible or out-of-pocket limit.

Your surgeon will also schedule pre-op measurements and possibly other tests. Our article on pre-op tests before cataract surgery covers what to expect.

If you are weighing surgery outside the US

Some readers compare US cataract surgery with options in Colombia or elsewhere. Know the coverage rule first. Medicare.gov states that Medicare usually does not cover health care outside the US, with narrow exceptions mostly tied to emergencies and border situations.

A planned cataract surgery abroad would generally be self-pay. Medicare.gov notes some Medigap policies may cover emergency care during foreign travel, which is different from planned surgery. If you are looking at Colombia, our Spanish-language guide to cataract surgery prices in Bogotá covers that market.

Whatever you decide, keep your US eye doctor in the loop for follow-up. Any later care in the US still runs through your Medicare plan.

The bottom line

Open Enrollment does not change what Medicare covers for cataract surgery. It changes who you can see, what approvals you need and how much of the 20% you carry.

If surgery is likely in 2027, spend an hour before December 7 confirming your surgeon, facility and authorization rules for next year's plan. Then get the premium lens price in writing, separate from the covered surgery.