ICD-10-CM > H00-H59 > H15-H22 > H18 > H18.4 > H18.45 H18.45 Nodular corneal degeneration Non-Billable/Non-Specific Codes H18.451Nodular corneal degeneration, right eyeH18.452Nodular corneal degeneration, left eyeH18.453Nodular corneal degeneration, bilateralH18.459Nodular corneal degeneration, unspecified eye