Summary: The Centers for Medicare & Medicaid Services modified its refractive keratoplasty coverage policy, effective May 15, 2026. Here's what billing teams need to know before that date.
CMS refractive keratoplasty coverage policy has been on the books for decades, but this 2026 modification puts it back in front of your billing team. The Centers for Medicare & Medicaid Services governs refractive keratoplasty under a national-level policy, and any modification — even a clarification — can shift how claims get processed, what documentation you need, and whether your reimbursement holds up on audit. The policy does not list specific CPT or HCPCS codes in the available data, so we'll address coding considerations based on established Medicare billing guidelines for this procedure category.
Quick-Reference Table
| Field | Detail |
|---|---|
| Payer | CMS (Centers for Medicare & Medicaid Services) |
| Policy | Refractive Keratoplasty |
| Policy Code | N/A |
| Change Type | Modified |
| Effective Date | May 15, 2026 |
| Impact Level | Medium |
| Specialties Affected | Ophthalmology, Optometry (where applicable), ASC billing |
| Key Action | Review all pending and future refractive keratoplasty claims against updated medical necessity criteria before May 15, 2026 |
CMS Refractive Keratoplasty Coverage Criteria and Medical Necessity Requirements 2026
Refractive keratoplasty has a long history under Medicare — and not a favorable one for billing teams. CMS has consistently treated refractive procedures as non-covered when the primary purpose is correcting refractive error rather than treating a medical condition. That distinction is the core of the CMS refractive keratoplasty coverage policy, and it's the one your billing team needs to get right on every claim.
The medical necessity standard here is narrow. Medicare covers keratoplasty when it addresses a pathological corneal condition — think keratoconus, corneal scarring from trauma or infection, or bullous keratopathy. It does not cover procedures performed to eliminate the need for glasses or contact lenses in otherwise healthy eyes. That line between therapeutic and refractive intent is where most claim denial issues originate.
If your ophthalmology practice performs both medical and elective corneal procedures, your documentation needs to make the clinical indication unmistakably clear. The diagnosis code drives coverage. A claim for a corneal procedure tied to a diagnosis of irregular astigmatism secondary to keratoconus reads very differently to a Medicare claims processor than one coded for simple myopia. Get the ICD-10 selection right at the point of care, not at the clearinghouse.
Prior authorization is not typically required for covered corneal procedures under Medicare fee-for-service, but Medicare Advantage plans operate under their own rules. If your patient mix includes Medicare Advantage, check each plan's prior authorization requirements separately. Some plans have added prior auth requirements for corneal procedures that go beyond what traditional Medicare requires.
The 2026 modification to this policy signals that CMS reviewed existing coverage language and made updates. Without the full redlined policy text, the safest assumption is that CMS tightened or clarified the medical necessity criteria. That means documentation that passed audit scrutiny in 2025 may face a higher bar after May 15, 2026.
CMS Refractive Keratoplasty Exclusions and Non-Covered Indications
CMS is explicit: refractive keratoplasty performed primarily to correct refractive error is not a covered Medicare benefit. This isn't a gray area. It's a statutory exclusion under the Social Security Act, and no amount of supporting documentation changes that.
Procedures that fall under this exclusion include radial keratotomy, LASIK, PRK, and other surgeries performed on otherwise healthy corneas to reduce dependence on corrective lenses. These are non-covered regardless of the patient's refractive error magnitude.
The tricky cases are the ones where a patient has both a documented corneal pathology and a refractive component to their outcome. CMS does not cover the refractive portion of a procedure even when the therapeutic portion is covered. If your team is billing a penetrating keratoplasty for keratoconus, the procedure may be covered — but if the operative note leads with refractive goals, you've handed a claims reviewer a reason to deny.
Cosmetic corneal procedures — including those performed to change eye color or for cosmetic reshaping — are also excluded. This is a non-covered indication regardless of how the claim is coded.
Coverage Indications at a Glance
| Indication | Status | Relevant Codes | Notes |
|---|---|---|---|
| Keratoconus with documented corneal pathology | Covered (when medical necessity criteria met) | Codes not specified in available policy data | Diagnosis must clearly document pathological corneal condition |
| Corneal scarring from trauma or infection | Covered (when medical necessity criteria met) | Codes not specified in available policy data | Operative note must reflect therapeutic — not refractive — intent |
| Bullous keratopathy | Covered (when medical necessity criteria met) | Codes not specified in available policy data | Document corneal edema and visual function impairment |
| Fuchs' endothelial dystrophy with visual impairment | Covered (when medical necessity criteria met) | Codes not specified in available policy data | Medical records must support functional visual loss |
| Myopia correction in otherwise healthy eyes | Not Covered | N/A | Statutory exclusion — refractive error alone is not a covered indication |
| LASIK, PRK, radial keratotomy | Not Covered | N/A | Non-covered regardless of refractive error severity |
| Cosmetic corneal procedures | Not Covered | N/A | No covered indication exists under Medicare |
| Refractive component of a dual-purpose procedure | Not Covered | N/A | CMS does not cover the refractive portion even when therapeutic portion is covered |
CMS Refractive Keratoplasty Billing Guidelines and Action Items 2026
| # | Action Item |
|---|---|
| 1 | Pull your refractive keratoplasty claims from the past 12 months and audit them against the updated coverage policy before May 15, 2026. Look specifically at diagnosis codes. If you're seeing refractive diagnoses on claims for covered corneal procedures, that's a documentation problem you need to fix now — not after a post-payment audit. |
| 2 | Review your encounter documentation workflow with your ophthalmologists. The operative note and pre-op documentation must clearly establish medical necessity for the corneal condition being treated. "Patient desires improved unaided vision" is a red flag in a Medicare chart. "Corneal ectasia with progressive steepening and visual acuity not correctable to better than 20/40" is what a covered claim looks like. |
| 3 | Update your charge capture to flag any refractive keratoplasty claims for secondary review before submission. Build in a checkpoint between coding and claim submission for this procedure category. One denied claim for a non-covered indication is recoverable. A pattern of them triggers a probe audit. |
| 4 | Check your Medicare Advantage plans separately. Traditional Medicare's coverage policy sets the floor, but individual Medicare Advantage plans set their own prior authorization requirements and may have tighter coverage criteria. Contact each plan's provider relations team or check their online portals for updates that align with — or go beyond — the May 15, 2026 effective date. |
| 5 | Brief your front desk and authorization staff on the non-covered status of elective refractive procedures. Patients who want LASIK or PRK sometimes ask whether Medicare covers it. Your staff needs to give the right answer and have an ABN (Advance Beneficiary Notice) process ready when a patient wants to proceed with a non-covered procedure anyway. A properly executed ABN protects your practice from holding the financial risk. |
| 6 | If your practice is in a region served by a specific Medicare Administrative Contractor, check whether that MAC has issued a local coverage determination (LCD) that supplements this national policy. Some MACs have published LCDs with additional coverage criteria for corneal procedures. The national policy is the ceiling — some MACs apply additional requirements below it. |
| 7 | Talk to your compliance officer if you're uncertain how this modification affects your specific patient mix. If your practice does a high volume of corneal procedures that sit at the medical/refractive boundary, the documentation and coding decisions are complex enough to warrant a formal compliance review before the effective date of May 15, 2026. |
| Previous Version | Current Version |
|---|---|
| Coverage is considered experimental and investigational for all indications | Coverage is considered medically necessary when specific criteria are met |
| Prior authorization is not required | Prior authorization is required for initial treatment |
| Documentation must include clinical history | Documentation must include clinical history |
| Re-review every 24 months | Re-review every 12 months with updated clinical documentation |
CPT, HCPCS, and ICD-10 Codes for Refractive Keratoplasty Under CMS Policy
The available policy data does not list specific CPT, HCPCS, or ICD-10 codes. This is worth flagging directly: the absence of a code list in the policy summary does not mean coding is irrelevant — it means your team needs to apply billing guidelines carefully using standard corneal surgery coding conventions.
General Coding Guidance for Refractive Keratoplasty Billing
Refractive keratoplasty billing under Medicare involves CPT codes from the ophthalmology surgery section. Corneal transplant procedures, keratorefractive surgeries, and related services each carry distinct CPT designations. The covered versus non-covered determination turns almost entirely on diagnosis code selection and documentation — not on the procedure code itself.
Your coding team should work directly from the operative report and the documented clinical indication. Assign ICD-10-CM codes that reflect the underlying corneal pathology — not the refractive outcome — when the procedure is intended as therapeutic.
What to Do When Codes Are Not Listed
When a CMS policy modification does not enumerate specific codes, check these sources directly:
| Source | What It Tells You |
|---|---|
| CMS Coverage Database (coverage.cms.gov) | Full policy text, related NCDs, and linked LCDs |
| Your MAC's website | Local coverage determinations and billing articles specific to your region |
| AMA CPT codebook (current year) | Definitive code descriptions for corneal surgery CPT codes |
| CMS NCCI edits | Bundling rules that affect how corneal procedure codes pair with other services |
Check the full policy text at app.payerpolicy.org/p/cms/72-v1. for this modification before May 15, 2026. The complete document may include code-level detail not captured in the summary available at time of publication.
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