ICD-10-CM > H00-H59 > H15-H22 > H21 > H21.3 > H21.31 H21.31 Exudative cysts of iris or anterior chamber Non-Billable/Non-Specific Codes H21.311Exudative cysts of iris or anterior chamber, right eyeH21.312Exudative cysts of iris or anterior chamber, left eyeH21.313Exudative cysts of iris or anterior chamber, bilateralH21.319Exudative cysts of iris or anterior chamber, unspecified eye