ICD-10-CM > H00-H59 > H15-H22 > H18 > H18.2 > H18.22 H18.22 Idiopathic corneal edema Non-Billable/Non-Specific Codes H18.221Idiopathic corneal edema, right eyeH18.222Idiopathic corneal edema, left eyeH18.223Idiopathic corneal edema, bilateralH18.229Idiopathic corneal edema, unspecified eye