ICD-10-CM > H00-H59 > H15-H22 > H18 > H18.5 > H18.50 H18.50 Unspecified hereditary corneal dystrophies Non-Billable/Non-Specific Codes H18.501Unspecified hereditary corneal dystrophies, right eyeH18.502Unspecified hereditary corneal dystrophies, left eyeH18.503Unspecified hereditary corneal dystrophies, bilateralH18.509Unspecified hereditary corneal dystrophies, unspecified eye