Inactive tuberculosis infection of the lungs with evidence of prior extensive disease.
To support a rating under this code, the most important evidence is documentation of when your tuberculosis was clinically identified and when it became inactive. Medical records that establish the date active disease was identified during or after service, and records that confirm the date of inactivity, directly tie your claim to the time-based rating levels.
For the far advanced minimum rating of 30%, records from any point while the disease was active — such as imaging studies, pathology reports, or physician notes — showing that lesions were far advanced are key. For the 20% level, records showing moderately advanced lesions combined with evidence of continued disability matter; this includes pulmonary function test results, notes documenting emphysema, records of dyspnea on exertion, or physician observations about impairment of health.
Your own statements, and statements from people who know you, describing how breathing difficulty or reduced physical capacity affects your work and daily activities can help show continued disability. If you had a thoracoplasty, records documenting rib removal are relevant because that procedure is rated separately as removal of ribs combined with collapsed lung rather than under this formula.
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.
