H21.53 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
H21.531
Iridodialysis, right eye
Billable
10
H21.532
Iridodialysis, left eye
Billable
10
H21.533
Iridodialysis, bilateral
Billable
10
H21.539
Iridodialysis, unspecified eye
Billable