H18.539
BillableGranular corneal dystrophy, unspecified eye
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
Granular corneal dystrophy is a genetic eye condition where small grain-like deposits accumulate in the cornea (the clear front part of the eye), causing progressive vision problems. This code is used when the specific eye affected is not documented.
Coding Tips
- •If documentation specifies which eye is affected (right, left, or bilateral), use the more specific codes H18.531 (right eye), H18.532 (left eye), or H18.533 (bilateral) instead of the unspecified code
- •This is a hereditary condition; verify if the patient has a family history documented, as this may support medical necessity for genetic testing or specialized ophthalmology referrals
Code Hierarchy
└H18Other disorders of cornea└H18.5Hereditary corneal dystrophies└H18.53Granular corneal dystrophy└H18.539Granular corneal dystrophy, unspecified eye
└H18.539Granular corneal dystrophy, unspecified eye