ICD-10-CM > H00-H59 > H15-H22 > H18 > H18.4 > H18.46 H18.46 Peripheral corneal degeneration Non-Billable/Non-Specific Codes H18.461Peripheral corneal degeneration, right eyeH18.462Peripheral corneal degeneration, left eyeH18.463Peripheral corneal degeneration, bilateralH18.469Peripheral corneal degeneration, unspecified eye