ICD-10-CM > H00-H59 > H15-H22 > H18 > H18.2 > H18.23 H18.23 Secondary corneal edema Non-Billable/Non-Specific Codes H18.231Secondary corneal edema, right eyeH18.232Secondary corneal edema, left eyeH18.233Secondary corneal edema, bilateralH18.239Secondary corneal edema, unspecified eye