CMS Retired NCD 343 for Home Oxygen Cluster Headache Treatment — What Billing Teams Must Know in 2026

TL;DR: The Centers for Medicare & Medicaid Services retired NCD 343, the national coverage determination governing home oxygen use to treat cluster headaches, effective September 27, 2021. Coverage decisions now fall to your regional Medicare Administrative Contractor. This update was formally documented and reissued on March 9, 2023, with a policy change date of January 9, 2026. Here's what that means for your billing team.

If you're still billing home oxygen for cluster headache patients under the assumption that a national policy governs the decision, you're working with an outdated framework. The CMS home oxygen cluster headache coverage policy no longer exists at the national level. Your MAC sets the rules now — and that changes everything about how you document, appeal, and bill these claims.

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Quick-Reference Table

Field	Detail Copy
Payer	CMS (Centers for Medicare & Medicaid Services)
Policy	Home Oxygen Use to Treat Cluster Headache (CH) — RETIRED
Policy Code	NCD 343
Change Type	Modified (Retired)
Effective Date	September 27, 2021 (formally logged January 9, 2026)
Impact Level	Medium — affects any DME supplier or neurology/headache practice billing Medicare for home oxygen for cluster headache patients
Specialties Affected	Neurology, pain management, DME suppliers billing home oxygen
Key Action	Contact your MAC to get the current local coverage determination before billing home oxygen for cluster headache

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CMS Home Oxygen Cluster Headache Coverage Criteria and Medical Necessity Requirements 2026

This is where the story gets complicated — and where your billing team needs to pay close attention.

Before September 27, 2021, NCD 343 in the CMS system gave you a single national standard. You knew exactly what medical necessity criteria applied, which diagnoses qualified, and how to document the claim. That uniform standard no longer exists.

Under section 1862(a)(1)(A) of the Social Security Act, coverage for home oxygen to treat cluster headaches is now evaluated at the contractor level. Each Medicare Administrative Contractor — Novitas, CGS, Palmetto, WPS, and the others — can set its own local coverage determination (LCD) with its own medical necessity criteria.

What that means practically: a patient in Texas billed under Novitas may face completely different coverage requirements than an identical patient in Ohio billed under CGS. Your documentation must align with your specific MAC's LCD, not a single national standard.

If your MAC hasn't published an LCD for this indication, coverage defaults to individual claim-by-claim review under Chapter 1, Section 240.2, Subsection D of the NCD Manual — the general home use of oxygen provisions. That section governs DME oxygen broadly, and it doesn't provide the specific cluster headache criteria that NCD 343 once supplied.

The prior authorization question matters here too. Whether prior authorization is required for home oxygen in this context depends entirely on your MAC and their local policy. Don't assume there's no prior auth requirement just because the national NCD is gone. Check your MAC's LCD and any applicable local coverage articles before you bill.

Reimbursement is also subject to your MAC's determination. Without a national policy setting uniform criteria, there's more room for variation — and more room for claim denial if your documentation doesn't meet the local standard.

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CMS Home Oxygen Cluster Headache Exclusions and Non-Covered Indications

NCD 343 being retired doesn't mean home oxygen for cluster headaches is automatically non-covered. That's a common misread, and it's worth correcting directly.

Retirement of an NCD removes the national standard. It doesn't establish a national non-coverage determination. CMS explicitly notes that MACs retain authority to cover this service under their own LCDs.

The practical risk is this: if your MAC hasn't published an LCD specifically addressing cluster headache, and you don't have a clear medical necessity rationale documented in the patient record, you're filing without a net. The claim can be denied on the grounds that medical necessity wasn't established — and without a specific LCD to point to in an appeal, your path back is harder.

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Coverage Indications at a Glance

Indication	Status	Relevant Codes	Notes Copy
Home oxygen for cluster headache — national level	Not Covered by NCD (NCD retired 9/27/2021)	No specific codes listed in NCD 343	NCD 343 retired; no national standard applies
Home oxygen for cluster headache — MAC/local level	Determined by MAC	MAC-specific HCPCS codes per LCD	Check your MAC's LCD; coverage varies by jurisdiction
General home use of oxygen	Covered (subject to medical necessity criteria)	Per NCD Manual Ch. 1, Sec. 240.2(D)	Cluster headache must meet general home oxygen criteria if no specific LCD exists

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CMS Home Oxygen Cluster Headache Billing Guidelines and Action Items 2026

This is where you stop reading and start doing. The national policy is gone. Here's how to keep your claims clean.

Copy Action Items

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CPT, HCPCS, and ICD-10 Codes for Home Oxygen Cluster Headache Under NCD 343

Covered CPT/HCPCS Codes

The policy does not list specific CPT or HCPCS codes. NCD 343 has been retired, and CMS did not assign specific billing codes to this NCD. Home oxygen claims are billed under HCPCS codes governed by your MAC's LCD or the general home oxygen provisions in the NCD Manual.

A Note on Code Selection for DME Home Oxygen Billing

Your HCPCS code selection for home oxygen depends on the equipment type, concentration, and delivery method — not on the diagnosis being treated. The diagnosis of cluster headache (or the absence of a specific code for it in this NCD) doesn't change how you code the equipment itself.

Contact your MAC or your DME billing specialist for the specific HCPCS codes applicable to your equipment and delivery method. The absence of codes in NCD 343 is a direct result of the NCD being retired — the codes weren't removed, they simply were never centralized under a national policy that no longer governs this service.

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What the NCD 343 Retirement Actually Signals

Here's the bigger picture worth understanding.

When CMS retires an NCD instead of replacing it, that's a deliberate choice. It signals that CMS doesn't believe a single national standard is the right framework for that indication — either because the evidence base is still developing, because utilization patterns vary too much regionally, or because the clinical picture doesn't fit a clean national rule.

For cluster headache and home oxygen, the evidence on efficacy has always been narrower than the patient population that might benefit. High-flow oxygen has real clinical support for aborting acute cluster attacks, but the Medicare population with cluster headaches isn't homogeneous, and the equipment and delivery specifics matter.

The retirement of NCD 343 puts coverage decisions with the MACs — which means the billing guidelines and medical necessity standards your team works with are local standards now. That's harder to manage than a single national policy, but it's the reality.

Treating this like a minor administrative update would be a mistake. If you bill DME oxygen for neurological indications, this structural change in how CMS handles the coverage policy for cluster headaches should be on your radar for the full year.

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