Diffuse secondary atrophy of choroid, unspecified eye

This code describes a generalized thinning or wasting away of the choroid layer of the eye, which is a vascular layer between the retina and the sclera. This atrophy is not the primary condition but rather a consequence of another underlying ocular or systemic disease. The specific eye affected is not documented.

Use this code when documentation indicates diffuse secondary choroidal atrophy without specifying laterality (right or left eye). This typically occurs in conditions like high myopia, inflammatory chorioretinal diseases, or certain retinal dystrophies. Ensure the physician explicitly states "secondary" and "diffuse" atrophy.

• Do not use this code if the laterality (right or left eye) is documented; instead, select the appropriate H31.121 or H31.122 code.
• Always sequence the underlying primary condition causing the secondary choroidal atrophy first.
• Avoid using this code for localized choroidal atrophy; look for more specific codes within the H31.1 category.