H18.42 is a "category code," which means it's non-billable. Billable codes require more specificity. Use the list below to navigate to codes that are more specific:
10
H18.421
Band keratopathy, right eye
Billable
10
H18.422
Band keratopathy, left eye
Billable
10
H18.423
Band keratopathy, bilateral
Billable
10
H18.429
Band keratopathy, unspecified eye
Billable