Pulmonary Rehabilitation Services — NCD 320 | CMS Coverage Update

TL;DR: The Centers for Medicare & Medicaid Services modified NCD 320, the National Coverage Determination governing Medicare pulmonary rehabilitation coverage policy, with an effective date of January 9, 2026. The core position hasn't changed — CMS still declines to set a national standard — but billing teams need to understand exactly what that means for claims.

CMS pulmonary rehabilitation coverage policy under NCD 320 Medicare remains a deliberately unresolved framework. CMS has determined that a comprehensive pulmonary rehabilitation program does not qualify as a defined Part B benefit under the Social Security Act. That pushes all coverage decisions down to the local level — meaning your Medicare Administrative Contractor sets the rules for your region. No specific CPT or HCPCS codes are listed in this policy document.

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Quick-Reference Table

Field	Detail Copy
Payer	CMS (Centers for Medicare & Medicaid Services)
Policy	Pulmonary Rehabilitation Services — NCD 320
Policy Code	NCD 320 Medicare
Change Type	Modified
Effective Date	January 9, 2026
Impact Level	Medium — structural impact on billing strategy, not a code-level change
Specialties Affected	Pulmonology, respiratory therapy, outpatient rehabilitation, COPDs and chronic respiratory disease programs
Key Action	Identify your MAC's active Local Coverage Determination for pulmonary rehab and confirm your billing guidelines match that LCD before submitting claims

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CMS Pulmonary Rehabilitation Coverage Criteria and Medical Necessity Requirements 2026

Here is the core tension in CMS pulmonary rehabilitation billing: CMS has formally decided that pulmonary rehabilitation as a whole program does not have a national coverage home.

The agency reviewed this in September 2007 and has not changed that position since. The January 9, 2026 modification confirms CMS still declines to issue a comprehensive NCD. That is not a technicality — it directly shapes how you build your medical necessity documentation and where you direct your prior authorization inquiries.

CMS defines pulmonary rehabilitation using the 1999 joint statement from the American Thoracic Society and the European Respiratory Society. The program must be multi-disciplinary, individually tailored, and designed to optimize physical and social performance and autonomy. The goal is to reduce symptoms, optimize functional status, increase participation, and reduce health care costs through stabilizing or reversing systematic manifestations of the disease.

That clinical definition matters when you build your medical necessity argument. If your documentation doesn't track to those specific aims — reduced symptoms, improved functional status, increased participation — you are building on a weak foundation before your claim even reaches the MAC.

The individual component services of a pulmonary rehab program can still be covered under Medicare, each falling into its own applicable benefit category. Respiratory therapy services, for example, are a covered service under the Comprehensive Outpatient Rehabilitation Facility benefit, defined at 42 CFR 410.100(e)(1) to (2)(vi). But the bundled program? CMS says that's not a defined Part B benefit, and the Social Security Act doesn't expressly create one.

What does that mean for prior authorization? You need to check with your specific MAC. There is no national prior authorization rule here. Your MAC's Local Coverage Determination — or case-by-case adjudication where no LCD exists — sets those requirements. Do not assume a process that works in one MAC jurisdiction will transfer to another.

Reimbursement for pulmonary rehab billing flows from your MAC's LCD, not from a national fee schedule tied to this NCD. That means rates and rules vary by region. If you operate across multiple MAC jurisdictions, you are managing multiple coverage policies effectively.

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CMS Pulmonary Rehabilitation Exclusions and Non-Covered Indications

NCD 320 does not designate any specific indications as nationally non-covered. The policy explicitly marks the "Nationally Non-Covered Indications" section as N/A.

This isn't a green light. It means CMS has pushed the non-coverage determinations down to the MAC level as well. Your MAC can still deny claims for specific conditions or settings. A missing LCD in your jurisdiction means the MAC adjudicates case by case — which carries real claim denial risk if your documentation doesn't hold up to individual review.

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Coverage Indications at a Glance

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CMS Pulmonary Rehabilitation Billing Guidelines and Action Items 2026

This policy rewards the billing teams that do their homework at the MAC level. Here's what to do before and after the January 9, 2026 effective date.

Copy Action Items

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CPT, HCPCS, and ICD-10 Codes for Pulmonary Rehabilitation Under NCD 320

No Codes Listed in NCD 320

The policy document for NCD 320 does not list any specific CPT, HCPCS, or ICD-10 codes. This is consistent with CMS's position: because there is no national coverage determination for a comprehensive pulmonary rehabilitation program as a Part B benefit, there are no nationally designated codes tied to this NCD.

This is not an oversight. It reflects the structure of the policy itself.

Your applicable codes come from two sources:

• Your MAC's LCD — which will specify the HCPCS and CPT codes it covers for pulmonary rehab services in your jurisdiction, along with covered ICD-10 diagnosis codes
• The individual benefit categories for component services — respiratory therapy under the CORF benefit, for example, has its own code set governed by 42 CFR 410.100(e)

Do not pull codes from third-party sources or assumptions about what "should" be covered. Pull codes directly from your MAC's active LCD. If no LCD exists for your jurisdiction, contact your MAC's provider outreach and education team before billing a comprehensive program.

Claims Processing Reference Transmittals

CMS has published two claims processing transmittals tied to this policy:

• Transmittal 1966 (Medicare Claims Processing)
• Transmittal 12497 (Medicare Claims Processing)

Review both transmittals for guidance on how Medicare systems handle pulmonary rehab claims. These are the closest thing to national billing instructions available under NCD 320.

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The Real Issue With NCD 320

The honest read on this policy is that it shifts risk to the billing team and the provider. CMS has decided not to decide at the national level. That's a defensible policy position, but it creates uneven coverage terrain across MAC jurisdictions — and real financial exposure for practices that don't track LCD changes at the local level.

If your MAC updates its LCD for pulmonary rehab, you may have days or weeks to adjust your billing guidelines, documentation templates, and charge capture before claims start failing. There is no national safety net here.

The other risk is the individual adjudication path. When no LCD exists, every claim is a judgment call by the MAC. That's where strong medical necessity documentation becomes the difference between payment and a claim denial. Your records need to tell the clinical story that matches the ATS/ERS definition CMS has explicitly cited as its reference point.

This is not a policy that hurts billing teams who prepare. It does hurt teams that assume national consistency where none exists.

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