ICD-10-CM > H00-H59 > H15-H22 > H21 > H21.2 > H21.24 H21.24 Degeneration of pupillary margin Non-Billable/Non-Specific Codes H21.241Degeneration of pupillary margin, right eyeH21.242Degeneration of pupillary margin, left eyeH21.243Degeneration of pupillary margin, bilateralH21.249Degeneration of pupillary margin, unspecified eye