H18.00 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
H18.001
Unspecified corneal deposit, right eye
Billable
10
H18.002
Unspecified corneal deposit, left eye
Billable
10
H18.003
Unspecified corneal deposit, bilateral
Billable
10
H18.009
Unspecified corneal deposit, unspecified eye
Billable