A18.5Tuberculosis of eye

A18.5 is the ICD-10-CM diagnosis code for tuberculosis of eye. It belongs to category A18 (tuberculosis of other organs), block A15-A19 (tuberculosis) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

Within A18 (tuberculosis of other organs), A18.5 is specifically for tuberculosis of eye. Related codes cover tuberculosis of bones and joints (A18.0), tuberculosis of genitourinary system (A18.1), tuberculous peripheral lymphadenopathy (A18.2), tuberculosis of intestines, peritoneum and mesenteric glands (A18.3), tuberculosis of skin and subcutaneous tissue (A18.4), tuberculosis of (inner) (middle) ear (A18.6), tuberculosis of adrenal glands (A18.7) and tuberculosis of other specified organs (A18.8).

To report this condition, pick the subcode that matches the documentation: A18.50 (unspecified), A18.51 (episcleritis), A18.52 (keratitis), A18.53 (chorioretinitis), A18.54 (iridocyclitis) and A18.59 (eye).

The conditions in its Excludes2 note aren't part of A18.5, but may be coded alongside it if the patient has both: lupus vulgaris of eyelid (A18.4).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.