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6844
§ 4.97 Schedule of ratings—respiratory system.

Lung surgery residuals (lobectomy, pneumonectomy)

Lasting effects after surgical removal of part or all of a lung.

What the rating means

Post-surgical residuals such as lobectomy (removal of a lung lobe) or pneumonectomy (removal of an entire lung) are rated under the General Rating Formula for Restrictive Lung Disease, which covers diagnostic codes 6840 through 6845. VA may also rate the primary disorder instead, whichever produces a higher evaluation.

The formula has four levels. A 100% rating applies when breathing test results are most severely reduced — for example, FEV-1 below 40% of predicted, FEV-1/FVC ratio below 40%, or DLCO below 40% predicted — or when you have conditions such as cor pulmonale, right ventricular hypertrophy, pulmonary hypertension confirmed by echocardiogram or cardiac catheterization, an episode of acute respiratory failure, or a need for outpatient oxygen therapy. A 60% rating applies when FEV-1 is 40 to 55% predicted, FEV-1/FVC is 40 to 55%, DLCO is 40 to 55% predicted, or maximum oxygen consumption is 15 to 20 ml/kg/min with a cardiorespiratory limitation. A 30% rating applies when FEV-1 is 56 to 70% predicted, FEV-1/FVC is 56 to 70%, or DLCO is 56 to 65% predicted. A 10% rating applies when FEV-1 is 71 to 80% predicted, FEV-1/FVC is 71 to 80%, or DLCO is 66 to 80% predicted.

Evidence that helps

Because the rating thresholds are tied directly to lung function measurements, pulmonary function test results are the most important records for this condition. Reports showing your FEV-1 value and its percentage of the predicted normal, the FEV-1/FVC ratio, and DLCO by the single-breath method each map directly to a specific rating level. The more recent and complete those test results are, the more clearly they reflect your current level of function.

For a 100% rating, records confirming cor pulmonale, right ventricular hypertrophy, or pulmonary hypertension — such as an echocardiogram report or cardiac catheterization findings — would support that level. Hospital records documenting an episode of acute respiratory failure, or a prescription and treatment records showing outpatient oxygen therapy, also speak to the 100% criteria. Cardiopulmonary exercise test results showing maximum oxygen consumption below 15 ml/kg/min with a cardiac or respiratory limitation are likewise relevant.

Statements from you or people who know you — describing how shortness of breath, reduced stamina, or other respiratory symptoms affect your ability to work, perform physical tasks, or carry out daily activities — can help VA understand how the measured impairment affects your life.

Secondary conditions

Conditions that are often caused or made worse by this one. If you have any of these, they may be claimable as secondary service connection.