In simple words: This code indicates tuberculosis affecting the eye, in a way not covered by other, more specific codes.

Other tuberculosis of the eye is a rare extrapulmonary manifestation of tuberculosis (TB). It results from the reactivation of Mycobacterium tuberculosis bacilli previously lodged in the eye, rarely by Mycobacterium bovis, or by direct inoculation through an open wound. This code is used when the specific manifestation isn't represented by another code.

Example 1: A patient presents with a history of TB and new-onset eye pain, redness, and blurred vision. Examination reveals granulomas in the choroid. PCR confirms ocular TB, and the patient is diagnosed with other tuberculosis of the eye (A18.59)., A patient with no prior TB history develops a persistent, painful eye inflammation. After extensive testing, including PCR of intraocular fluid, a diagnosis of tuberculous scleritis is made. Since there's no other specific code, A18.59 is used., A child presents with an atypical chalazion.Further investigation and testing reveals the presence of Mycobacterium tuberculosis, leading to a diagnosis of other tuberculosis of the eye (A18.59).

Documentation should include evidence of TB infection (e.g., PCR, tuberculin skin test, history), detailed ophthalmological examination findings, and any other diagnostic tests performed.If a more specific diagnosis can be made (e.g. tuberculous keratitis), the more specific code should be used instead of A18.59.