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Does Medicare cover glaucoma screening? The high-risk rule Sioux Falls seniors should know in 2026

Medicare will pay for a glaucoma check. But only for a narrow slice of people who meet one exact test — and most beneficiaries have never heard the four conditions that decide it.

Big Sioux Benefits Data Desk

Published September 23, 2026 · 16 min read · Sourced from Medicare.gov & CMS.gov

Yes, Medicare covers a glaucoma screening, but only once a year and only if you fall into one of four specific high-risk groups — diabetes, family history, being African American and 50 or older, or being Hispanic and 65 or older. Outside those four categories, a glaucoma check is treated the same as any other routine eye exam: not a Medicare-covered service. That narrow line trips people up constantly, because it sounds like a preventive benefit everyone gets, the way an annual wellness visit is, and it isn't.

Every figure in this guide was fetched and confirmed live this week: Medicare.gov's own glaucoma screening coverage page, CMS's Medicare Coverage Database Article A53495 (the actual billing and documentation rule your eye doctor's office follows), CMS's CY2026 Medicare Parts A & B premiums and deductibles fact sheet, CDC's Vision Health Initiative glaucoma data, KFF's 2026 Medicare Advantage benefits research, and this site's own CMS PY2026 Minnehaha County Medicare Advantage plan data desk. No invented numbers, no "usually covered" with nothing behind it.

The four-part high-risk test

Glaucoma is a group of eye diseases that damage the optic nerve, usually tied to elevated pressure inside the eye, and it typically progresses with no early symptoms at all — vision loss often starts at the edges of your field of view, where it's easy to miss until real damage has already happened. That's the reason a screening benefit exists in the first place: by the time glaucoma is obvious to the person experiencing it, treatment options have narrowed.

Medicare's coverage rule doesn't treat every beneficiary as equally likely to develop it. Instead, CMS pays for an annual screening only for people who meet at least one of four specific conditions, per Medicare.gov and CMS Medicare Coverage Database Article A53495:

Source: Medicare.gov — Glaucoma Screenings and CMS Medicare Coverage Database — Article A53495, Glaucoma Screening.

Notice what isn't on that list: age by itself. Turning 65, or 70, or 80 doesn't trigger Medicare's glaucoma screening benefit on its own — you need diabetes, a documented family history, or to meet one of the two race-and-age combinations above. A 68-year-old with no diabetes, no family history, and no ties to either of the two named groups doesn't qualify for the covered screening under Original Medicare, no matter how routine an eye exam feels at that age.

Why the rule is drawn this narrow

Medicare's benefit structure treats "screening" and "diagnosis" as two different things, and that split explains a lot of the confusion. A screening checks someone with no known symptoms or diagnosis, to catch a problem early. Once you actually have a diagnosed eye condition, like glaucoma itself, or you're recovering from something like cataract surgery, the services you need shift into diagnostic or treatment coverage, which runs under different Medicare rules entirely, generally covered the same way any other doctor's visit for a known condition would be.

Outside of that diagnostic pathway and the narrow glaucoma screening benefit above, Medicare treats routine, preventive eye care — a standard comprehensive eye exam, a vision check for new glasses, a contact lens fitting — as excluded from coverage, the same category as routine dental cleanings and routine hearing exams. It's a consistent pattern across the program, not something singled out for vision. Medicare Part B does step in for a handful of specific, narrow scenarios: diabetic retinopathy exams for people with diabetes, macular degeneration treatment, and one pair of standard eyeglasses after cataract surgery with an intraocular lens implant. Glaucoma screening for the four high-risk groups above is one more of those narrow, named exceptions — not a general "eye care is covered" rule.

This is also why the rule surprises people who assumed a routine annual eye exam and a "Medicare glaucoma screening" were the same appointment. They can happen at the same visit, but they're billed as two separate things — and only the second one is a Medicare-covered benefit, and only for the four groups above.

What actually happens at the appointment

CMS's coverage rule is specific about what the screening itself has to include — it isn't satisfied by a quick pressure check alone. Per CMS Medicare Coverage Database Article A53495, a covered glaucoma screening requires:

Source: CMS Medicare Coverage Database — Article A53495, Glaucoma Screening.

The exam has to be performed by, or under the direct supervision of, an ophthalmologist or optometrist who is legally authorized under South Dakota law to conduct glaucoma testing, per Medicare.gov. A primary care doctor generally can't bill Medicare for this specific screening; it has to route through an eye doctor's office, even though your primary care provider is often the one who first documents that you're diabetic or have a family history, which is what opens the door to the benefit in the first place.

What it costs in Sioux Falls in 2026

The coverage headline hides the actual math most people want before they book the appointment. Here's the real 2026 number, straight from CMS's own fact sheet.

CMS set the 2026 Part B annual deductible at $283, up from $257 in 2025, and the standard Part B monthly premium at $202.90, per CMS's own fact sheet published November 14, 2025. If a glaucoma screening is the first Part B service you use in a given year, the full deductible applies before Medicare pays anything toward it. If you've already met your deductible earlier in the year through other care — a routine lab test, a specialist visit, anything billed to Part B — only your 20% coinsurance applies to the screening itself.

Medicare pays its 80% share directly to a participating eye doctor who accepts assignment, meaning they've agreed to accept Medicare's approved amount as payment in full and can only bill you your deductible and coinsurance share on top. A quick, one-sentence question — "do you accept Medicare assignment?" — before you schedule is worth asking, since a non-participating provider can legally charge more.

Source: CMS — Choosing a Medigap Policy (Publication 02110), standardized Medigap benefit chart.

A Medigap policy layered on top of Original Medicare can close that 20% coinsurance gap almost entirely for a covered glaucoma screening, the same way it does for any other Part B service. Plan G, generally the most comprehensive option available to people newly eligible for Medicare since 2020, covers 100% of Part B coinsurance once you've met the deductible yourself. Plan N covers the same coinsurance but can carry a small office-visit copay, which may apply to an eye doctor visit depending on how the visit is billed.

How common glaucoma actually is

The narrowness of Medicare's rule can make glaucoma sound like a rare condition. It isn't. More than 3 million Americans currently live with glaucoma, and CDC projects that number will climb to 6.3 million by 2050 as the population ages, per CDC's Vision Health Initiative.

Source: CDC — Vision Health Initiative, Glaucoma Programs.

The disparity by race is exactly why Medicare wrote race and ethnicity into its high-risk criteria. Glaucoma is six times more common among Black or African American people than White people, per CDC. The undiagnosed gap runs even wider for Hispanic and Latino patients: a 2016 study found 81% of glaucoma cases among Hispanic or Latino people are undiagnosed and untreated, compared with 73% among non-Hispanic White people, per CDC's citation of Niraj and Joos, "Glaucoma disparities in the Hispanic population," published in Seminars in Ophthalmology in 2016.

Two kinds of glaucoma, and why the screening looks for the quiet one

"Glaucoma" isn't one single disease — it's a category, and the two main types behave almost nothing alike. Open-angle glaucoma is the most common type in the United States, per the National Eye Institute, and it's the quiet one: pressure builds slowly inside the eye over months or years, with no pain and no obvious symptoms, while it gradually damages the optic nerve from the outside edges of your vision inward. By the time someone notices their own vision has narrowed, the damage is usually permanent, which is exactly why a proactive screening test — not waiting for symptoms — is the only way to catch it early.

Angle-closure glaucoma works the opposite way, per NEI: it's less common, but it can come on suddenly and needs emergency care. NEI lists the warning signs plainly: intense eye pain, nausea, a red eye, and blurry vision. If you or someone you're caring for has that combination of symptoms, that's not a "wait for the next annual visit" situation — it's an emergency room or urgent eye-care visit the same day.

The screening benefit described throughout this guide is built for the first kind — the slow, symptomless kind that a scheduled annual check can catch years before you'd ever notice anything yourself. That's also the reason the screening looks specifically at optic nerve health and internal eye pressure, rather than asking whether you've noticed any vision changes: for open-angle glaucoma, by the time you'd notice something, the screening has already done its job or already missed its window.

The Minnehaha County diabetes connection

Diabetes is the one high-risk category on Medicare's list that applies at any age, and it's also the one most directly tied to local data. In Minnehaha County, 10% of adults have diagnosed diabetes, according to CDC PLACES County Data for 2023.

Run that percentage against the county's Medicare population and the scale becomes clearer: Minnehaha County has 39,532 Medicare beneficiaries, per CMS's PY2026 county enrollment data. Even using the county's general adult diabetes rate as a rough guide — actual diabetes prevalence among people 65 and older typically runs higher than the all-adult average, though we don't have an age-specific county figure to cite here — a meaningful share of the county's Medicare population has diabetes, and therefore already qualifies for Medicare's glaucoma screening benefit, whether or not they've ever been told that.

That's the practical takeaway buried in the eligibility rule: if you have diabetes and see an eye doctor for your required diabetic retinopathy exam, ask whether a glaucoma check can be documented and billed in the same visit. The two exams share some of the same equipment and can often be combined, saving you a separate appointment.

If you don't fit any of the four categories

Plenty of Sioux Falls Medicare beneficiaries don't have diabetes, don't have a documented family history, and don't fall into either of the two named race-and-age groups — and for that group, Original Medicare simply doesn't pay for a glaucoma check, covered or not. That doesn't mean an eye exam isn't worth getting; it means it isn't a Medicare-covered benefit for you specifically.

There are two realistic paths from there. First, you can pay out of pocket for a routine comprehensive eye exam through any local optometrist or ophthalmologist — a normal exam like this typically includes the same pressure check and optic nerve look Medicare's screening requires, just billed as routine care rather than a Medicare benefit. Second, and often the better option financially: check whether your plan already includes a routine vision benefit. 99% of individual Medicare Advantage plans for 2026 include some routine vision coverage that Original Medicare simply doesn't offer, per KFF's Medicare Advantage 2026 Spotlight report — a benefit that isn't tied to Medicare's high-risk screening rule at all, and doesn't care whether you have diabetes or a family history.

What that Medicare Advantage vision benefit actually covers — a full comprehensive exam, just glasses, an annual allowance toward frames — varies plan by plan, and Original Medicare plus a Medigap policy doesn't include a routine vision benefit at all, since Medigap only supplements what Medicare itself covers. This is exactly the kind of detail worth comparing before assuming either path gets you a covered annual eye exam.

Medicare Advantage vs. Original Medicare + Medigap

The four-part high-risk rule above is federal Medicare policy, and it applies the same way whether you're in Original Medicare or a Medicare Advantage plan, since a Medicare Advantage plan has to cover at least what Original Medicare covers. What changes between the two paths is everything around that narrow screening benefit.

Original Medicare plus a Medigap policy means broader provider choice — you can generally see any eye doctor who accepts Medicare, without a network restriction — and the Medigap coverage layered on top can eliminate most or all of your 20% coinsurance on the covered screening itself. What it doesn't do is add a routine vision benefit; if you don't meet the high-risk test, you're paying out of pocket for a routine exam either way.

A Medicare Advantage plan works differently. You're generally working within a specific network of eye doctors, and many plans require you to see an in-network provider for the vision benefit to apply. In exchange, a large majority of plans bundle in that routine vision coverage, plus an annual out-of-pocket maximum across all your Part A and B cost-sharing that Original Medicare alone doesn't offer.

Here's the Minnehaha County reality check. All 5 standard Medicare Advantage PPOs open to anyone with Medicare in the county carry that kind of annual out-of-pocket cap:

Source: CMS Medicare Advantage / Part D Landscape (PY2026) & CMS Medicare Advantage & Part D Star Ratings (2026), Minnehaha County, plan year 2026. 39,532 Minnehaha County beneficiaries are covered by one of these arrangements today, per CMS's PY2026 county enrollment data.

Neither path is automatically better for eye care specifically. The plans we offer in the Sioux Falls area differ on exactly this kind of vision-benefit detail — some include a meaningful annual eye exam and eyewear allowance, others a thinner benefit — and that's worth a real side-by-side look rather than assuming any plan's vision coverage matches another's.

Where Sioux Falls beneficiaries actually get screened

A glaucoma screening happens at an eye doctor's office, not a hospital, but Sioux Falls's two major health systems both run ophthalmology and optometry practices that see Medicare patients, and it's worth knowing the broader landscape you're working within if a referral or a related eye problem comes up. Sanford USD Medical Center carries a 5-star overall CMS hospital rating, and Avera McKennan Hospital & University Health Center carries a 4-star overall CMS rating, per CMS Hospital Compare's most recently published overall star ratings.

Source: CMS Hospital Compare — Overall Star Ratings.

Those star ratings measure hospital quality broadly, not eye-clinic-specific outcomes — Medicare doesn't publish a comparable star system for individual optometry or ophthalmology practices the way it does for hospitals and Medicare Advantage plans. The practical takeaway is simpler: whichever system your primary care doctor sits within, both have eye-care referral pathways already built in, so raising the glaucoma-screening question at your next primary care visit is usually the fastest way to get a referral moving, rather than trying to find an unaffiliated optometrist cold.

Billing codes and why claims get questioned

A Medicare-covered glaucoma screening bills under one of two federal codes: G0117, when the eye doctor performs the screening personally, or G0118, when it's performed under that doctor's direct supervision, per CMS Medicare Coverage Database Article A53495. The claim also carries diagnosis code Z13.5 — the code for an encounter that's specifically a screening for eye and ear disorders, not a diagnostic visit for an existing condition.

CMS's coverage rule enforces the annual timing strictly: at least 11 full months have to pass after the month of your last covered screening before the next one qualifies for coverage, per CMS Medicare Coverage Database Article A53495. Book slightly early and the claim can come back denied for timing alone, independent of whether you're still high-risk.

If your claim is denied

A denial isn't automatically final. If Medicare turns down a glaucoma screening claim, you have the same appeal rights as any other Part B decision:

1. Read the denial reason first. It typically cites either a missing high-risk documentation issue, a timing problem (screened too soon after the last covered one), or a billing-code mismatch — three different fixes.
2. Ask your eye doctor's office to check the chart note for whether your specific high-risk category was documented and included on the claim.
3. File a written redetermination request within 120 days of the date on your denial notice, per CMS.gov — First Level of Appeal: Redetermination by a Medicare Contractor. Your Medicare Summary Notice shows the exact deadline.
4. If the gap is a documentation issue, a corrected chart note or an amended claim from your provider's office resolves a real share of these denials without further escalation.

If you'd rather not navigate the forms alone, talk it through with us. We can walk through the denial and the appeal with you at no cost.

How we help

Annual Coverage Review and Plan Comparison are two of the services we do every day, and glaucoma screening sits right at the overlap. We're not a substitute for your eye doctor — but when a client isn't sure whether they qualify for a covered screening, or wants to know exactly what their plan's vision benefit actually includes, that's a conversation we have constantly. On the plan-comparison side, we walk through how a specific Medicare Advantage plan's vision benefit compares to Original Medicare plus a Medigap policy, for your specific situation, among the plans we offer in the Sioux Falls area.

What you get out of that conversation is concrete: clarity on whether you already qualify for a covered screening you didn't know about, a clear sense of what you'd owe before the appointment, and, if you want broader routine vision coverage than Original Medicare offers, a real look at which local plans actually deliver that.

What to watch heading into 2027

1. Ask your primary care doctor to document diabetes or family history in your chart if either applies to you — that documentation is what actually makes the covered screening apply to you.
2. Calendar your next screening at least 12 months out from your last one, to avoid a timing-based denial.
3. Confirm the billing code before you leave the appointment — ask whether it was billed G0117 or G0118, not a routine exam code.
4. If you're shopping Medicare Advantage plans this AEP, compare the actual routine vision benefit, not just the premium — coverage amounts and networks vary widely.
5. If you don't fit any of the four high-risk categories, don't assume you're out of options — check your plan's routine vision benefit or budget for an out-of-pocket exam instead.

How we know all this: every figure above was fetched and confirmed live this week directly from Medicare.gov, CMS's Medicare Coverage Database, CMS's own CY2026 Medicare Parts A & B premiums and deductibles fact sheet, CDC's Vision Health Initiative, KFF's 2026 Medicare Advantage research, CDC PLACES County Data, and this site's own CMS PY2026 Minnehaha County plan data desk, built by Strategic AI Architects. This is education, not advice; your own coverage, a licensed agent, or Medicare.gov are the final word on your specific situation. We do not offer every plan available in your area — any information we provide is limited to those plans we do offer in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options. Big Sioux Benefits is a licensed independent insurance agency and is not connected with or endorsed by the United States government or the federal Medicare program. We take no payment from any carrier to feature a plan.