H21.1 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
H21.1X1
Other vascular disorders of iris and ciliary body, right eye
Billable
10
H21.1X2
Other vascular disorders of iris and ciliary body, left eye
Billable
10
H21.1X3
Other vascular disorders of iris and ciliary body, bilateral
Billable
10
H21.1X9
Other vascular disorders of iris and ciliary body, unspecified eye
Billable