TL;DR: The Centers for Medicare & Medicaid Services modified NCD 261, the National Coverage Determination governing Medicare coverage of computer enhanced perimetry, with an effective date of January 9, 2026. Here's what changes for billing teams.
CMS computer enhanced perimetry coverage policy under NCD 261 in the CMS Medicare system confirms this diagnostic service as covered when used to assess visual fields in patients with glaucoma or other neuropathologic defects. The policy does not list specific CPT or HCPCS codes within the NCD document itself — a gap that creates real documentation and charge capture challenges for your team.
Quick-Reference Table
| Field | Detail |
|---|---|
| Payer | CMS / Centers for Medicare & Medicaid Services |
| Policy | Computer Enhanced Perimetry |
| Policy Code | NCD 261 |
| Change Type | Modified |
| Effective Date | 2026-01-09 |
| Impact Level | Medium |
| Specialties Affected | Ophthalmology, Optometry, Neurology |
| Key Action | Confirm your charge capture aligns with the covered indications — glaucoma and neuropathologic defects — and that your documentation supports medical necessity before submitting claims after January 9, 2026. |
CMS Computer Enhanced Perimetry Coverage Criteria and Medical Necessity Requirements 2026
NCD 261 is the National Coverage Determination governing Medicare coverage of computer enhanced perimetry. The procedure uses a microcomputer to measure visual sensitivity at preselected locations in the visual field. That's the clinical definition straight from the policy.
CMS covers computer enhanced perimetry under one clear condition: the service must be used to assess visual fields in patients with glaucoma or other neuropathologic defects. That's the full scope of the covered indications. There's no ambiguity about what qualifies — but there's also no expanded list of conditions, which means anything outside glaucoma and neuropathologic defects is not covered under this NCD.
Medical necessity documentation is your front line of defense here. Your clinical notes must connect the test directly to a documented diagnosis of glaucoma or a neuropathologic condition. A visual field test ordered for general screening or without a supporting diagnosis will not meet the medical necessity standard under this coverage policy.
The policy does not mention prior authorization requirements. That said, prior auth requirements can exist at the local level through Medicare Administrative Contractor policies, even when a national coverage determination is silent on it. Check with your MAC before assuming no prior authorization is needed — especially if your payer mix includes Medicare Advantage plans that layer their own rules on top of NCD 261.
The Centers for Medicare & Medicaid Services categorizes this service under the Diagnostic Tests (other) benefit category. This matters for claim submission because it shapes how the service routes through claims processing and which billing guidelines apply.
CMS Computer Enhanced Perimetry Exclusions and Non-Covered Indications
The policy is narrow by design. Coverage applies only to glaucoma and neuropathologic defects. CMS does not expand coverage to other ophthalmic conditions, routine vision screening, or other visual field assessments not tied to a documented neuropathologic or glaucomatous condition.
There's no experimental or investigational designation within NCD 261 — the policy doesn't call out specific exclusions by name. The real issue here is what's left unsaid. If a patient has a visual complaint that isn't tied to glaucoma or a neuropathologic condition, computer enhanced perimetry is simply not a covered service under this NCD. Bill it under those circumstances and you're looking at a claim denial.
Reimbursement will be at risk any time the diagnosis code on the claim doesn't support the covered indication. Make sure your ICD-10-CM codes tell the right clinical story before submission.
Coverage Indications at a Glance
| Indication | Status | Relevant Codes | Notes |
|---|---|---|---|
| Glaucoma — visual field assessment | Covered | No specific CPT/HCPCS listed in NCD | Medical necessity documentation required; ICD-10 diagnosis must reflect glaucoma |
| Neuropathologic defects — visual field assessment | Covered | No specific CPT/HCPCS listed in NCD | Diagnosis must document neuropathologic condition; medical necessity required |
| General vision screening (no qualifying diagnosis) | Not Covered | N/A | Not a covered indication under NCD 261 |
| Visual field testing for non-neuropathologic ophthalmic conditions | Not Covered | N/A | Outside the scope of covered indications in this policy |
CMS Computer Enhanced Perimetry Billing Guidelines and Action Items 2026
The absence of specific CPT or HCPCS codes in this NCD is the most operationally tricky part of this policy update. It puts the burden on your billing team to confirm which codes you're currently using for computer enhanced perimetry and verify that those codes align with current Medicare billing guidelines at the local level.
Here are your action items before January 9, 2026:
| # | Action Item |
|---|---|
| 1 | Audit your diagnosis codes now. Every claim for computer enhanced perimetry must carry an ICD-10-CM code supporting glaucoma or a neuropathologic defect. Pull a sample of recent claims and confirm the diagnosis codes are accurate and specific — not unspecified codes that invite scrutiny. |
| 2 | Contact your MAC to confirm applicable CPT codes. Because NCD 261 does not list specific CPT or HCPCS codes, your Medicare Administrative Contractor is the authoritative source for which procedure codes apply under this NCD in your region. Call them or check their local coverage determination library before the effective date of January 9, 2026. |
| 3 | Update your superbill and charge capture templates. Once you confirm the correct codes with your MAC, update your charge capture workflow to flag any computer enhanced perimetry claim that lacks a qualifying glaucoma or neuropathologic diagnosis. This prevents claim denial at submission. |
| 4 | Train your clinical documentation team. The physician note must explicitly state that the computer enhanced perimetry was performed to assess visual fields in the context of a glaucoma or neuropathologic diagnosis. A note that documents the test without tying it to a covered indication will not survive a medical necessity review. |
| 5 | Check your Medicare Advantage contracts separately. Medicare Advantage plans follow NCD 261 as a baseline but can add their own prior authorization requirements and billing guidelines on top of it. If you see Medicare Advantage volume for this service, verify each plan's rules independently. |
| 6 | If you're unsure how this applies to your patient mix, talk to your compliance officer before January 9, 2026. The lack of specific codes in the NCD itself creates enough ambiguity that a second set of eyes is worth the conversation — especially if this is a high-volume service in your practice. |
| 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 Computer Enhanced Perimetry Under NCD 261
Covered CPT/HCPCS Codes
The Centers for Medicare & Medicaid Services does not list specific CPT or HCPCS codes within NCD 261. This is not unusual for older NCDs, but it does create a gap in your billing workflow.
| Code | Type | Description |
|---|---|---|
| Not specified in NCD 261 | — | CMS does not enumerate procedure codes within this NCD. Contact your Medicare Administrative Contractor for applicable codes in your region. |
This is a meaningful operational issue. The absence of codes in the NCD means you need to rely on local coverage determinations from your MAC to confirm which procedure codes are appropriate for computer enhanced perimetry billing. Don't assume the codes you've been using are current without validating them.
Key ICD-10-CM Diagnosis Codes
NCD 261 does not list specific ICD-10-CM codes. However, the coverage criteria define the qualifying conditions. The relevant ICD-10-CM categories to use — confirmed with your MAC and coding resources — will fall under glaucoma diagnoses and neuropathologic conditions affecting the visual field. Your coding team should already have these mapped, but confirm they're specific and not defaulting to unspecified codes.
| Code | Description |
|---|---|
| Refer to ICD-10-CM for glaucoma and neuropathologic condition codes | NCD 261 does not enumerate specific ICD-10-CM codes. Diagnosis codes must reflect glaucoma or a neuropathologic defect to meet the coverage policy criteria. |
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