Inactive tuberculosis infection of the lungs with evidence of prior moderate disease.
For the time-based ratings — 100%, 50%, and 30% — the key evidence is a clear, documented date of inactivity and records confirming the disease was clinically identified during or after service. Treatment records, lab results, and imaging from the period of active disease help establish when inactivity began, which determines which time stage applies.
For the permanent 20% rating, you would need evidence of continued disability after the time stages have passed. Medical records showing emphysema, measured breathing difficulty, or documented dyspnea on exertion would support this level. Pulmonary function test results, imaging such as chest X-rays or CT scans, and notes from treating providers describing your respiratory status are all relevant. Statements from you describing how shortness of breath or reduced stamina affects your work and daily activities can help show that impairment of health continues.
For the permanent 30% minimum, records from when the disease was active would need to show that the lesions were classified as far advanced at that time. Radiology reports or clinical notes from the active phase are the most direct evidence for that finding.
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.
