TL;DR: The Centers for Medicare & Medicaid Services modified NCD 258 for transillumination light scanning (diaphanography), effective January 9, 2026. Medicare does not cover this procedure. Here's what billing teams need to know.
This is a non-coverage determination. The CMS diaphanography coverage policy under NCD 258 in the Medicare system is clear: program payment is not made for transillumination light scanning used to detect breast cancer or other breast disease. No specific CPT or HCPCS codes are listed in the policy document itself. If your team is billing for this procedure — or considering it — stop now and read this first.
Quick-Reference Table
| Field | Detail |
|---|---|
| Payer | CMS (Centers for Medicare & Medicaid Services) |
| Policy | Transillumination Light Scanning or Diaphanography — NCD 258 |
| Policy Code | NCD 258 |
| Change Type | Modified |
| Effective Date | 2026-01-09 |
| Impact Level | Low (non-coverage is unchanged; modification is administrative) |
| Specialties Affected | Radiology, breast imaging, diagnostic testing, oncology |
| Key Action | Do not submit Medicare claims for diaphanography — deny at charge capture, not at claims submission |
CMS Transillumination Light Scanning Coverage Criteria and Medical Necessity Requirements 2026
NCD 258 is a National Coverage Determination governing Medicare coverage of transillumination light scanning — also called diaphanography — for breast cancer and breast disease detection. The Centers for Medicare & Medicaid Services maintains that this procedure does not meet medical necessity standards for Medicare reimbursement.
The policy language is direct: the usefulness of transillumination light scanning, compared to existing breast cancer detection methods, has not been clearly established. CMS states that further study is needed before this technology can be assigned a defined role in breast cancer diagnosis. Until that happens, Medicare program payment is not allowed.
This is not a "covered with conditions" situation. There is no clinical scenario, diagnosis code, or documentation pathway that unlocks reimbursement for this procedure under Medicare. No prior authorization process exists — because prior authorization only applies to covered services. Diaphanography is simply non-covered.
The CMS diaphanography coverage policy has not changed in substance. The modification recorded on January 9, 2026 appears administrative. But any update to an NCD is worth reviewing — especially if your practice has recently acquired imaging equipment marketed as transillumination or light-based breast scanning.
CMS Transillumination Light Scanning Exclusions and Non-Covered Indications
The exclusion here is total. CMS does not cover transillumination light scanning or diaphanography for any breast-related indication under Medicare. That includes:
| # | Excluded Procedure |
|---|---|
| 1 | Breast cancer screening |
| 2 | Diagnostic workup for a palpable breast mass |
| 3 | Follow-up imaging after abnormal mammography |
| 4 | Detection of other breast disease beyond cancer |
The policy categorizes this technology as lacking established clinical usefulness — not as unsafe, but as unproven relative to existing methods. Mammography, ultrasound, and MRI have defined roles under Medicare. Diaphanography does not.
This distinction matters for your billing team. "Unproven" is different from "investigational" in some contexts, but under NCD 258, the outcome is the same: no Medicare payment. Don't confuse the policy's acknowledgment that the technology "appears safe" as a pathway to coverage. Safety and medical necessity are separate determinations, and CMS has only affirmed the former.
If a provider on your team believes this technology has evolved and warrants reconsideration, that's a clinical and regulatory conversation — not a billing workaround. Reconsideration requests go through the formal NCD reconsideration process, not through claim submission.
Coverage Indications at a Glance
| Indication | Status | Relevant Codes | Notes |
|---|---|---|---|
| Breast cancer detection via transillumination light scanning | Not Covered | None listed in NCD 258 | NCD-level denial; no medical necessity pathway exists |
| Other breast disease detection via diaphanography | Not Covered | None listed in NCD 258 | Same NCD applies; no coverage for any breast disease indication |
CMS Diaphanography Billing Guidelines and Action Items 2026
The effective date of January 9, 2026 applies to this modified version of NCD 258. Your action items are straightforward, but skipping any one of them creates claim denial exposure.
| # | Action Item |
|---|---|
| 1 | Audit your charge master now. Search for any charge description that references transillumination, diaphanography, or light-based breast scanning. If those charges exist, flag them for removal or suppression from Medicare claims before they generate a submission. |
| 2 | Do not submit Medicare claims for this service. This is not a case where you submit and appeal — NCD 258 provides no coverage pathway. Submitting a claim you know is non-covered raises compliance risk beyond simple claim denial. |
| 3 | Train your front desk and scheduling teams. If a provider orders this procedure, the non-coverage determination needs to surface before the patient appointment — not after the claim is denied. Use an Advance Beneficiary Notice (ABN) process if you plan to bill the patient directly. |
| 4 | Issue an ABN if the patient will self-pay. Medicare patients can be billed for non-covered services if a valid ABN is signed before service. Without a signed ABN, you cannot collect from the patient for a Medicare-denied service. Make sure your ABN workflow is in place before January 9, 2026. |
| 5 | Check your commercial payer policies separately. NCD 258 governs Medicare. Commercial payers may have different positions on diaphanography — some may cover it under specific circumstances, others may follow CMS's lead. Do not assume that Medicare's non-coverage determination applies universally to your entire payer mix. |
| 6 | Talk to your compliance officer if you're unsure about your exposure. If your practice has been submitting claims for light-based breast scanning under Medicare — even under a different code description — that's a retrospective audit risk. Loop in your compliance officer before January 9, 2026 to assess whether any lookback review is warranted. |
| 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 Transillumination Light Scanning Under NCD 258
Covered CPT Codes
The policy does not list any covered CPT or HCPCS codes. Transillumination light scanning is not covered under NCD 258. There are no codes to bill for this service under Medicare.
Not Covered / Experimental Codes
NCD 258 does not assign specific CPT or HCPCS codes to this procedure. The policy applies to transillumination light scanning and diaphanography as a technology category. If your Medicare Administrative Contractor (MAC) has issued a local coverage determination (LCD) that assigns a specific code to this procedure in your region, that local guidance governs — but the NCD-level non-coverage takes precedence. Check with your MAC for any region-specific coding guidance.
A Note on Coding This Procedure
Because no codes are specified in NCD 258, billing teams sometimes assume a miscellaneous or unlisted code could capture the service. It cannot — at least not for Medicare reimbursement. Miscellaneous codes don't create a pathway around an NCD non-coverage determination. The absence of a listed code is not a gap to exploit. It reflects the fact that CMS has not assigned this procedure a billable code in the Medicare fee schedule because it doesn't intend to pay for it.
If your practice uses a code for this service in your charge master — whatever that code is — it should not be routed to Medicare claims. Period.
Key ICD-10-CM Diagnosis Codes
No ICD-10-CM codes are specified in NCD 258. The non-coverage applies regardless of the diagnosis driving the order.
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