How Do Medicare and Medicare Advantage Coverage Differ for Ophthalmology?
As of October 2026, a session at the American Academy of Ophthalmology annual meeting in New Orleans confirmed that the same cataract surgery, glaucoma procedure, or diagnostic imaging test can be covered by one payer and denied by another. Medicare follows National Coverage Determinations and Local Coverage Determinations set by CMS. Medicare Advantage plans are legally permitted to administer benefits differently, which means coverage rules, prior authorization requirements, and documentation thresholds vary by plan, state, and insurer.
Payer identification is the first billing step. Before coding or documenting, your billing team must confirm whether the patient is on traditional Medicare, a Medicare Advantage plan, or a commercial policy, because the rules that govern the claim differ for each.
Medicare Advantage can require prior authorization that traditional Medicare does not. Aetna and Humana have applied prior authorization requirements to cataract surgery in specific states, delaying treatment for thousands of Medicare Advantage beneficiaries.
LCD guidelines do not automatically apply to MA plans. A procedure that passes the LCD medical necessity threshold for traditional Medicare may still be denied by a Medicare Advantage plan that applies its own internal coverage criteria.
What the AAO 2026 Session Revealed
At the American Academy of Ophthalmology annual meeting held October 10 through 12, 2026, in New Orleans, a session on payer-specific coverage policies drew significant attention from ophthalmology practice administrators and billing professionals. The presenters, including AAO Director of Health Policy Brandy Keys Sokolow and clinical faculty from the University of Michigan, walked through how Medicare, Medicare Advantage, and commercial plans apply different coverage rules to the same ophthalmologic services.
The central takeaway was blunt: the same CPT code, billed with the same documentation, can produce a clean payment from one payer and a denial from another. The session emphasized that payer identification must happen before documentation and coding decisions are made, not after the claim is submitted. For ophthalmology practices billing procedures like OCT imaging under CPT 92134, where LCD frequency limits and medical necessity thresholds apply differently across payers, this distinction is not academic. It is the difference between a paid claim and a denial.
Sokolow referred to Medicare Advantage as “Medicare Disadvantage” during the session, a characterization that reflects the frustration many ophthalmology practices experience when MA plans apply coverage restrictions that do not exist under traditional Medicare. The audience response suggested this is a widespread operational pain point, not an isolated concern.
Which Ophthalmology Practices Are Affected?
Any ophthalmology practice that accepts Medicare patients is affected, because the Medicare Advantage enrollment share continues to grow. As of 2026, more than half of all Medicare beneficiaries are enrolled in Medicare Advantage plans rather than traditional Medicare, according to the Kaiser Family Foundation. That means the majority of your Medicare-age patients are now on plans that can apply different coverage and prior authorization rules than the traditional Medicare program your billing workflows were originally built around.
Practices with high cataract surgery volume face the most immediate risk. Aetna and Humana have both implemented prior authorization requirements for cataract surgery in specific states, with Florida and Georgia being the most directly affected. The AAO estimated that in a single month, cataract surgery was delayed unnecessarily for 10,000 to 20,000 Aetna beneficiaries when that policy was in effect nationally. Even after Aetna rolled back the requirement in most states, it remained in place for Medicare Advantage patients in Florida and Georgia.
Retina practices billing anti-VEGF injections, glaucoma practices relying on diagnostic imaging frequency, and general ophthalmology offices performing routine comprehensive exams are all exposed to payer-specific variation that can produce unexpected denials if the billing team does not check the plan rules before submitting the claim.
How Do Coverage Rules Differ by Payer Type?
The differences between traditional Medicare, Medicare Advantage, and commercial plans are structural, not incidental. Understanding where they diverge is what separates ophthalmology billing teams that prevent denials from those that chase them.
| Coverage Element | Traditional Medicare | Medicare Advantage | Commercial Plans |
|---|---|---|---|
| Coverage authority | CMS National Coverage Determinations (NCDs) and Local Coverage Determinations (LCDs) | Plan-level coverage policies; may differ from NCDs and LCDs | Individual plan contracts; no CMS mandate |
| Prior authorization | Rarely required for most ophthalmology procedures | Allowed by law; applied by Aetna, Humana, and others for cataract surgery in select states | Common for surgical procedures; varies by carrier and plan |
| Medical necessity standard | LCD-defined criteria (e.g., functional impairment for cataract, IOP thresholds for glaucoma imaging) | May apply internal criteria that differ from LCD standards | Plan-specific; may require additional documentation beyond CMS standards |
| Frequency limits for imaging | LCD-defined (e.g., OCT 92134 annually unless medical necessity documented) | May apply stricter frequency caps | Varies by plan; some have no frequency limit, others deny repeat imaging |
| Appeal process | Medicare Redetermination, then QIC, then ALJ | Plan internal appeal, then independent review | Plan-defined; varies by state insurance regulations |
The most common issue we see providers run into is assuming that a procedure approved under traditional Medicare will be approved the same way under a Medicare Advantage plan. That assumption leads to claims submitted without checking the MA plan’s specific coverage policy, which is how preventable denials happen at scale.
What Should Your Practice Do Now?
The AAO session reinforced a set of operational changes that ophthalmology practices should implement immediately to reduce payer-specific denials. These steps are not theoretical. They reflect the workflow adjustments that the strongest billing operations in our network already follow.
1. Verify payer type at every visit. Confirm whether the patient is on traditional Medicare, a specific Medicare Advantage plan, or a commercial policy before the encounter. The coverage rules, documentation thresholds, and prior authorization requirements differ for each.
2. Check plan-specific coverage policies before scheduling surgery. For cataract procedures, verify whether the patient’s MA plan requires prior authorization. Do not assume that the absence of a Medicare LCD prior auth requirement means the MA plan has no requirement.
3. Document to the strictest payer standard. If your practice sees patients across all three payer types, build documentation templates that meet the highest documentation threshold so the note supports any payer’s review.
4. Track denials by payer type, not just by code. A denial on CPT 92134 from a Medicare Advantage plan and the same denial from traditional Medicare have different root causes and different appeal pathways. Your denial tracking system should distinguish between them.
5. Build a payer-specific reference sheet for your top 10 procedures. List the coverage criteria, frequency limits, and prior authorization requirements for each payer type across your highest-volume CPT codes. Update it quarterly.
6. Train front desk staff on MA plan identification. The front desk team must be able to distinguish a Medicare Advantage card from a traditional Medicare card and flag it in the system before the patient is seen.
Providers often come to us after repeated denials on procedures that were always paid under traditional Medicare. If your practice is seeing more MA denials and your billing team does not have a payer-specific workflow in place, Ophthalmology Bill Co can connect you with a billing company that handles Medicare, Medicare Advantage, and commercial ophthalmology claims. The match is free and most providers hear from a partner within two hours.
Common Payer-Related Billing Mistakes
Across the billing companies we vet, five payer-related errors drive the majority of ophthalmology claim denials that could have been prevented with a better front-end workflow.
1. Treating Medicare Advantage as traditional Medicare. Billing an MA plan using the same documentation and authorization assumptions as traditional Medicare is the single most common source of preventable denials in ophthalmology practices with a mixed payer population.
2. Missing the prior authorization requirement for cataract surgery. In states where specific MA plans require pre-approval, submitting a cataract claim without prior authorization results in an automatic denial regardless of medical necessity.
3. Applying LCD medical necessity criteria to an MA plan. An MA plan may use its own internal medical necessity definition that is stricter or structured differently than the LCD. A claim that passes the LCD threshold can still be denied by the MA plan.
4. Filing appeals through the wrong pathway. Medicare appeals follow the Redetermination, QIC, and ALJ process. MA appeals go through the plan’s internal review first. Filing a Medicare-style appeal on an MA denial wastes time and delays resolution.
5. Failing to track denial patterns by payer. A spike in denials on ICD-10 code H52.03 or CPT 92134 may trace to a single MA plan’s policy change, not to a coding error. Without payer-level tracking, the root cause stays hidden.
In-House vs. Outsourced Billing for Mixed Payer Practices
One question we hear constantly from practice managers is whether their in-house team can realistically keep up with the payer-specific variation that Medicare Advantage plans introduce. The honest answer depends on the size of your practice and the diversity of your payer mix.
A solo ophthalmologist with a single dominant payer can often manage payer rules in-house with a well-maintained reference sheet. A multi-provider practice billing 15 to 20 different MA plans alongside traditional Medicare and several commercial carriers is dealing with a matrix of coverage policies, prior authorization rules, and appeal pathways that changes quarterly. That level of complexity is where a specialized billing partner earns its value.
The billing companies in our network hold certifications from AAPC, AHIMA, and in many cases have specific training aligned with AAO coding guidelines. They maintain payer-specific coverage databases, track MA policy changes in real time, and handle the prior authorization burden so your clinical staff can focus on patient care. In our experience matching providers with billing partners, the practices that gain the most from outsourcing are those with growing MA patient populations and in-house teams already stretched thin by the complexity of ophthalmology coding.
For a deeper look at what the matching process involves, visit our About Us page.
Frequently Asked Questions
Medicare Advantage plans are required to cover at least the same services as traditional Medicare, but they are legally permitted to administer those benefits differently. That means they can apply prior authorization requirements, use different medical necessity criteria, and impose coverage restrictions that do not exist under the traditional Medicare program.
Yes. Medicare Advantage plans can require prior authorization for cataract surgery, and some have done so. Aetna required prior authorization nationally before rolling back the policy in most states. Humana applied a similar requirement in Georgia. Traditional Medicare does not require prior authorization for cataract surgery.
Not automatically. Local Coverage Determinations are binding on Medicare Administrative Contractors that process traditional Medicare claims. Medicare Advantage plans may reference LCDs but are not required to follow them and can apply their own internal coverage criteria, which may be stricter or structured differently.
Traditional Medicare denials follow the Redetermination, QIC, and ALJ appeal pathway. Medicare Advantage denials go through the plan’s internal appeal process first, then to an independent external review. Filing through the wrong pathway delays resolution and can result in a missed appeal deadline.
Different payers require different documentation elements to establish medical necessity. If you document to the traditional Medicare LCD standard but the patient is on an MA plan with additional requirements, the documentation may not support the claim. Identifying the payer first ensures the note meets the correct threshold.
CMS finalized a rule requiring Medicare Advantage plans to streamline prior authorization by adopting electronic systems and improving response times. The AAO and ASCRS have advocated for stronger enforcement of these reforms to reduce the burden on ophthalmology practices and prevent unnecessary delays in patient care.
Next Steps
Review your practice’s current payer verification workflow to confirm that Medicare Advantage patients are flagged before the encounter, not after the claim is submitted. For help understanding how LCD guidelines apply to your diagnostic imaging billing, see our guide on CPT code 92134.
If your billing team needs support managing payer-specific coverage rules across Medicare, Medicare Advantage, and commercial plans, Ophthalmology Bill Co can match your practice with a billing company that specializes in ophthalmic coding and payer compliance.
Ophthalmology Bill Co connects eye care practices with billing companies that understand the coverage differences between Medicare, Medicare Advantage, and commercial plans. The service is free, and most providers are connected with a matched billing partner within two hours. Over 200 providers matched nationwide.
