In simple words: This code represents disorders of the choroid and retina (the back part of the eye) that occur as a result of another disease. It is important to also code the underlying disease causing the eye problem.

Chorioretinal disorders in diseases classified elsewhere. Code first underlying disease, such as: congenital toxoplasmosis (P37.1), histoplasmosis (B39.-), leprosy (A30.-). Excludes1: chorioretinitis (in): toxoplasmosis (acquired) (B58.01), tuberculosis (A18.53).

Example 1: A patient with congenital toxoplasmosis presents with chorioretinal scars. The physician would code P37.1 for the toxoplasmosis and H32 for the chorioretinal disorder., A patient with disseminated histoplasmosis is found to have chorioretinal lesions. The physician would code B39.9 for the histoplasmosis and H32 for the chorioretinal involvement., A patient with leprosy develops chorioretinal changes. The physician would code A30.9 for the leprosy and H32 for the eye manifestations.

Documentation should clearly link the chorioretinal disorder to the underlying disease.Supporting documentation might include ophthalmological examination findings, imaging studies, and laboratory results confirming the primary diagnosis.

** It is important to distinguish between acquired and congenital toxoplasmosis when coding. Use B58.01 for acquired toxoplasmosis with chorioretinitis and P37.1 for congenital toxoplasmosis.Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition.