In simple words: This code indicates tuberculosis (TB) in parts of the body not usually affected, like muscles or brain arteries.TB is a bacterial infection that most commonly affects the lungs but can spread to other areas. The symptoms vary depending on the location of the infection.

This code represents tuberculosis infections in sites not specifically classified elsewhere. It includes infections by Mycobacterium tuberculosis and Mycobacterium bovis affecting locations other than the lungs, lymph nodes, pleura, brain, kidneys, bones, and joints. Examples include tuberculosis of the muscle (muscular tuberculosis) and tuberculous cerebral arteritis (inflammation of the arteries in the brain due to tuberculosis).

Example 1: A patient with a history of pulmonary tuberculosis presents with a painful lump in their thigh. Biopsy reveals muscular tuberculosis., A patient undergoing treatment for HIV develops tuberculous meningitis with associated inflammation of the cerebral arteries, confirmed by MRI., A patient with a history of latent TB infection and recent corticosteroid treatment presents with multiple painful muscle swellings in their arms and legs. Imaging and biopsy confirm the diagnosis of disseminated muscular tuberculosis.

Documentation should include evidence of active tuberculosis infection, the specific site of involvement, diagnostic test results (e.g., imaging, biopsy, culture), and treatment plan.