| H18.81 | Anesthesia and hypoesthesia of cornea | NON-BILLABLE CODE |
| H18.811 | Anesthesia and hypoesthesia of cornea, right eye | BILLABLE CODE |
| H18.812 | Anesthesia and hypoesthesia of cornea, left eye | BILLABLE CODE |
| H18.813 | Anesthesia and hypoesthesia of cornea, bilateral | BILLABLE CODE |
| H18.819 | Anesthesia and hypoesthesia of cornea, unspecified eye | BILLABLE CODE |
| H18.82 | Corneal disorder due to contact lens | NON-BILLABLE CODE |
| H18.821 | Corneal disorder due to contact lens, right eye | BILLABLE CODE |
| H18.822 | Corneal disorder due to contact lens, left eye | BILLABLE CODE |
| H18.823 | Corneal disorder due to contact lens, bilateral | BILLABLE CODE |
| H18.829 | Corneal disorder due to contact lens, unspecified eye | BILLABLE CODE |
| H18.83 | Recurrent erosion of cornea | NON-BILLABLE CODE |
| H18.831 | Recurrent erosion of cornea, right eye | BILLABLE CODE |
| H18.832 | Recurrent erosion of cornea, left eye | BILLABLE CODE |
| H18.833 | Recurrent erosion of cornea, bilateral | BILLABLE CODE |
| H18.839 | Recurrent erosion of cornea, unspecified eye | BILLABLE CODE |
| H18.89 | Other specified disorders of cornea | NON-BILLABLE CODE |
| H18.891 | Other specified disorders of cornea, right eye | BILLABLE CODE |
| H18.892 | Other specified disorders of cornea, left eye | BILLABLE CODE |
| H18.893 | Other specified disorders of cornea, bilateral | BILLABLE CODE |
| H18.899 | Other specified disorders of cornea, unspecified eye | BILLABLE CODE |
