| Code | Description |
| H18.601 | Keratoconus, unspecified, right eye |
| H18.602 | Keratoconus, unspecified, left eye |
| H18.603 | Keratoconus, unspecified, bilateral |
| H18.609 | Keratoconus, unspecified, unspecified eye |
| H18.611 | Keratoconus, stable, right eye |
| H18.612 | Keratoconus, stable, left eye |
| H18.613 | Keratoconus, stable, bilateral |
| H18.619 | Keratoconus, stable, unspecified eye |
| H18.621 | Keratoconus, unstable, right eye |
| H18.622 | Keratoconus, unstable, left eye |
| H18.623 | Keratoconus, unstable, bilateral |
| H18.629 | Keratoconus, unstable, unspecified eye |