Inflammatory disease causing granulomas in organs (commonly lungs, lymph nodes)
For the 100% active-infection level, medical records showing a confirmed active sarcoidosis episode along with documented systemic symptoms matter most. These include records of measured fever, clinician notes describing night sweats or significant weight loss, and lab or imaging findings consistent with active disease. Pulmonologist or treating physician notes that describe hemoptysis would also support this level. For residual ratings, the type of evidence depends on the analogy VA applies. If interstitial or restrictive lung disease is the analogy, pulmonary function test results showing reduced lung volumes or diffusion capacity are directly relevant. If chronic bronchitis is the analogy, spirometry showing obstructive patterns would be central. In all cases, records from respiratory specialists, imaging such as chest X-rays or CT scans, and your own statements describing how breathing difficulties affect your ability to work, exercise, or carry out daily tasks can help show the full picture of how sarcoidosis has affected your lungs.
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.