Pulmonology billing
Most coverage questions ask what was done. Two of pulmonology's biggest ask something else. Pulmonary rehabilitation is covered for moderate to very severe COPD, which 42 CFR 410.47 defines by naming a clinical staging system maintained outside government -- and lung cancer screening is covered only if a counselling and shared decision-making visit happened first, with four specified things in it, documented.
- The pulmonary rehabilitation regulation defines the covered condition as GOLD classification II, III and IV
- The individualized treatment plan must be established, reviewed and signed by a physician every 30 days
- Sessions are capped at two one-hour sessions a day and 36 sessions, with a further 36 only on contractor approval
- A screening LDCT is covered only after a documented counselling and shared decision-making visit
This is an educational guide to how billing works for pulmonology — its workflow, coding, and payer considerations. It is general information, not a statement that US Medical Billing serves this specialty, and not billing, coding, or legal advice.
What makes pulmonology billing distinct
Pulmonary rehabilitation is one of the few Medicare benefits whose coverage boundary is drawn by a classification the government does not maintain. 42 CFR 410.47 covers pulmonary rehabilitation for beneficiaries with moderate to very severe COPD, and then parenthetically defines that phrase as GOLD classification II, III and IV -- the severity grades of the Global Initiative for Chronic Obstructive Lung Disease. Whether the benefit exists for a given patient therefore turns on a staging determination made under an external clinical framework, and the referral must come from the physician treating the chronic respiratory disease.
The regulation also names a second covered population that has nothing to do with COPD: beneficiaries who have had confirmed or suspected COVID-19 and experience persistent symptoms including respiratory dysfunction for at least four weeks. Further indications may be added through a national coverage determination. So the covered-condition list is genuinely a list, and a patient with severe respiratory disease who is on none of it is not covered by this benefit however unwell they are.
What the programme must contain is prescribed in the same regulation, and all of it is required. Physician-prescribed exercise during each session. Education or training tailored to the individual, which must include information on respiratory problem management and, if appropriate, brief smoking cessation counselling. A psychosocial assessment. An outcomes assessment, measured at the beginning and the end of the programme, with objective clinical measures of exercise performance alongside self-reported measures of shortness of breath and behaviour. And an individualized treatment plan detailing how the components are used for that patient -- which the regulation requires be established, reviewed and signed by a physician every 30 days.
The rule reaches the staff as well as the service. The programme's medical director and any supervising practitioner must possess expertise in the management of individuals with respiratory pathophysiology and cardiopulmonary training in basic or advanced cardiac life support; the medical director must also be licensed in the state where the programme is offered. A supervising practitioner must be immediately available and accessible for medical consultations and emergencies at all times items and services are being furnished. Payment exists only in a physician's office or a hospital outpatient setting, and the setting must hold the emergency and life-saving equipment the regulation describes. These are conditions for coverage, not accreditation preferences.
Lung cancer screening makes the same move in a different register: it makes a conversation a prerequisite service. Under the national coverage determination, before a beneficiary's first screening low dose CT they must receive a counselling and shared decision-making visit that determines eligibility, includes shared decision-making using one or more decision aids, counsels on the importance of adherence to annual screening and on the impact of comorbidities and willingness to undergo diagnosis and treatment, and counsels on maintaining abstinence or on cessation with information about tobacco cessation interventions -- all appropriately documented in the medical record. The eligibility criteria sit alongside it, and the reading radiologist and the imaging facility have criteria of their own.
How pulmonology billing flows
Two of the specialty's defining services are gated before they start, so the revenue cycle begins well upstream of the encounter.
Establishing that the patient is in a covered class
For pulmonary rehabilitation that means the staging determination and the referral from the treating physician, or the post-COVID indication with persistent respiratory symptoms for at least four weeks. The determination is clinical; whether it is recorded well enough to support a claim is not.
Common operational challenges
The recurring difficulties are about evidence for conditions that were satisfied outside the billing system, often weeks earlier.
A coverage gate written in clinical language
A staging classification is a clinical judgement recorded in clinical notes. It is also, here, the fact that decides whether a benefit exists -- so it has to be findable, attributable and dated, which is not how staging is usually recorded.
A signature on a recurring clock
A plan reviewed and signed every 30 days is easy to satisfy once and easy to lose at the third interval. Nothing in a session's own documentation reveals that the governing plan went unsigned.
A count that belongs to the programme, not the claim
Session limits run across a course of treatment. A practice that reconciles claim by claim can pass every individual edit and still discover the thirty-seventh session was never going to be paid.
A prerequisite visit somebody else may have done
The shared decision-making visit can be furnished by a different practitioner than the one ordering or performing the scan. Establishing that it happened, and that it contained what the determination requires, is a records problem across organizations.
Documentation and coding considerations
The notes below describe coverage conditions and documentation requirements from the regulation and the national coverage determination; they do not reproduce any code descriptions.
The covered conditions are a closed list
42 CFR 410.47 covers beneficiaries with moderate to very severe COPD, defined as GOLD classification II, III and IV, when referred by the physician treating the chronic respiratory disease; and beneficiaries with confirmed or suspected COVID-19 and persistent symptoms including respiratory dysfunction for at least four weeks. Additional indications may be established through a national coverage determination.
Every component is required, and each is defined
Physician-prescribed exercise means aerobic exercise combined with other types as determined appropriate for the individual. Outcomes assessment requires evaluations measured at the beginning and end of the programme, including objective clinical measures of exercise performance and self-reported measures of shortness of breath and behaviour. The psychosocial assessment and the individualized treatment plan are components in the same sense.
The thirty-day plan signature
The individualized treatment plan must be established, reviewed, and signed by a physician every 30 days. The plan itself must state the diagnosis, the type, amount, frequency and duration of the items and services furnished under it, and the goals set for the individual.
The session arithmetic
Sessions are limited to a maximum of two one-hour sessions per day, for up to 36 sessions over up to 36 weeks, with the option of an additional 36 sessions over an extended period if approved by the Medicare Administrative Contractor. Both the daily cap and the programme total are coverage limitations.
The screening visit's required content
The counselling and shared decision-making visit must determine eligibility; include shared decision-making with one or more decision aids; counsel on adherence to annual screening, the impact of comorbidities, and ability or willingness to undergo diagnosis and treatment; and counsel on maintaining abstinence or on cessation, with information about tobacco cessation interventions where appropriate. It must be appropriately documented in the medical record.
Denial and rejection risks
Most of these are decided before the service is furnished, which is what makes them expensive to discover afterwards.
A staging determination that is not in the record
Where the notes describe severe symptoms but never state the classification the regulation names, the coverage condition is unevidenced. The patient may well qualify; the claim cannot show it.
Sessions past the limit without contractor approval
The additional 36 sessions are available only if the Medicare Administrative Contractor approves. Furnishing them first and seeking approval afterwards leaves a course of treatment with no coverage behind it.
A supervision or setting failure
Payment exists only in a physician's office or hospital outpatient setting, with a qualified practitioner immediately available and accessible at all times services are furnished. A programme delivered elsewhere, or without that availability, does not meet the conditions for coverage.
A screening scan performed before the conversation
The determination places the counselling and shared decision-making visit before the beneficiary's first LDCT screening. A scan performed first cannot be made compliant by holding the visit afterwards.
An eligibility criterion missed on an annual screen
The determination sets criteria for the beneficiary, for the reading radiologist's board status and for the imaging facility's use of a standardized lung nodule identification, classification and reporting system. Each is a separate way for a technically perfect scan to be non-covered.
Payer-process considerations
Two different pieces of coverage machinery govern this specialty, and they behave differently.
A regulation, not a policy bulletin
The pulmonary rehabilitation conditions sit in the Code of Federal Regulations, so they change through rulemaking rather than through a contractor's local policy. Checking the current text is the reliable move; checking a summary of it is not.
The contractor holds a real decision
The second block of 36 sessions depends on Medicare Administrative Contractor approval, which makes the jurisdiction's own instructions part of the treatment plan rather than an administrative afterthought.
Screening is an additional preventive service
Lung cancer screening with LDCT is covered under the additional preventive services authority, and the determination states that Part B coinsurance and deductible are waived for it. Preventive cost-sharing rules differ from ordinary Part B, and patient statements should reflect that.
Commercial plans and Medicare Advantage vary
The rules described here are Original Medicare. Commercial payers and Medicare Advantage plans set their own criteria for rehabilitation and screening, may require authorization, and may draw the covered population differently.
Revenue-cycle checkpoints
The first four happen before a claim exists, which is where this specialty's revenue is actually decided.
- Record the severity classification the regulation names, and the referral from the treating physician, before the programme starts
- Hold the individualized treatment plan as a document containing diagnosis, type, amount, frequency, duration and goals
- Diary the 30-day plan review and physician signature for the whole course, not for the first interval
- Confirm the setting, the supervising practitioner's availability and the required equipment as coverage conditions
- Track sessions against both the two-per-day cap and the 36-session total across the programme
- Obtain contractor approval before furnishing an additional block of sessions
- Evidence the counselling and shared decision-making visit, with its required elements, before the first screening scan
- Check the reading radiologist and imaging facility criteria as part of screening eligibility, not as a radiology matter
Related & connected
Services, tools, background reading and definitions that connect to the pulmonology revenue-cycle steps above.
Related services
- Eligibility & verificationEstablishing that a patient is inside a coverage class before the service is furnished.
- Coding supportReporting programmes with required components, session limits and a recurring plan signature.
- Denial managementWorking denials whose cause was settled weeks before the claim was built.
Calculators & tools
- Patient eligibility verification checklistThe upfront checks a coverage-gated service depends on.
- Medicare Administrative Contractor jurisdictionsWhich contractor decides an extended block of rehabilitation sessions.
- ABN issuance checklistHow a beneficiary is told, in advance, that a service is expected not to be covered.
From the Knowledge Base
- National and local coverage determinationsThe machinery that decides whether a service is covered at all, and where to read the current text.
- Medicare preventive services billingThe preventive framework screening sits inside, including the cost-sharing distinctions.
- The Advance Beneficiary NoticeTelling a patient in advance that sessions past the limit are expected not to be paid.
- Medical necessity denialWhat to do when the coverage condition was met but the record does not show it.
Glossary
- National coverage determinationThe instrument that decides screening coverage nationally, and that may add rehabilitation indications.
- Medical necessityThe standard a coverage condition makes concrete for a named population.
- Advance Beneficiary NoticeThe notice that transfers financial responsibility when a limit is expected to be exceeded.
- Medicare Administrative ContractorThe contractor whose approval an extended block of rehabilitation sessions depends on.
Frequently asked questions
Who is pulmonary rehabilitation covered for?
42 CFR 410.47 covers it under Medicare Part B for beneficiaries with moderate to very severe COPD -- which the regulation defines as GOLD classification II, III and IV -- when referred by the physician treating the chronic respiratory disease; and for beneficiaries who have had confirmed or suspected COVID-19 and experience persistent symptoms that include respiratory dysfunction for at least four weeks. The regulation adds that further medical indications may be established through a national coverage determination. The unusual feature is the first one: the coverage boundary is set by a severity classification maintained outside government and named in the regulation.
What has to be in a pulmonary rehabilitation programme?
All of it, by regulation. Physician-prescribed exercise during each session; education or training tailored to the individual that must include information on respiratory problem management and, if appropriate, brief smoking cessation counselling; a psychosocial assessment; an outcomes assessment; and an individualized treatment plan detailing how the components are used for that patient. The outcomes assessment must include evaluations measured at the beginning and the end of the programme, with objective clinical measures of exercise performance and self-reported measures of shortness of breath and behaviour.
How often does the treatment plan have to be signed?
Every 30 days. The regulation requires the individualized treatment plan to be established, reviewed, and signed by a physician every 30 days, and specifies what the plan must contain: a description of the individual's diagnosis, the type, amount, frequency and duration of the items and services furnished under the plan, and the goals set for the individual. On a course of treatment running several months, that is a repeating obligation rather than a one-off authorization, and it is the kind of requirement that is satisfied at the outset and quietly missed later.
How many sessions does Medicare cover?
The regulation limits pulmonary rehabilitation to a maximum of two one-hour sessions per day, for up to 36 sessions over up to 36 weeks, with the option for an additional 36 sessions over an extended period of time if approved by the Medicare Administrative Contractor. Both limits matter operationally: the daily cap constrains scheduling, and the programme total has to be tracked across a course of treatment rather than per claim, because the session that exceeds it looks identical to the one before it.
Why does a lung cancer screening need a visit beforehand?
Because the national coverage determination makes it a condition of coverage. Before a beneficiary's first screening with low dose computed tomography, they must receive a counselling and shared decision-making visit that determines eligibility, includes shared decision-making using one or more decision aids, counsels on the importance of adherence to annual screening and on the impact of comorbidities and ability or willingness to undergo diagnosis and treatment, and counsels on maintaining cigarette smoking abstinence or on cessation with information about tobacco cessation interventions where appropriate -- all appropriately documented in the beneficiary's medical records. Separate criteria apply to the beneficiary, to the reading radiologist's board status, and to the imaging facility's use of a standardized lung nodule identification, classification and reporting system.
Sources
Last reviewed August 1, 2026.
- Office of the Federal Register / eCFR42 CFR 410.47 Pulmonary rehabilitation program: Conditions for coverage -- the definitions of individualized treatment plan, outcomes assessment, physician-prescribed exercise, psychosocial assessment and supervising practitioner; the covered conditions including the GOLD classification definition and the post-COVID indication; the required components and the 30-day plan signature; the two payable settings and the equipment and supervision standards; the medical director and supervising practitioner qualifications; and the session limits
- Centers for Medicare & Medicaid Services (CMS)National Coverage Determination 210.14, Lung Cancer Screening with Low Dose Computed Tomography (LDCT) -- the beneficiary eligibility criteria, the counselling and shared decision-making visit and its required content and documentation, the reading radiologist and radiology imaging facility criteria, and the waiver of Part B coinsurance and deductible
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