| H18.00 | Unspecified corneal deposit | NON-BILLABLE CODE |
| H18.001 | Unspecified corneal deposit, right eye | BILLABLE CODE |
| H18.002 | Unspecified corneal deposit, left eye | BILLABLE CODE |
| H18.003 | Unspecified corneal deposit, bilateral | BILLABLE CODE |
| H18.009 | Unspecified corneal deposit, unspecified eye | BILLABLE CODE |
| H18.01 | Anterior corneal pigmentations | NON-BILLABLE CODE |
| H18.011 | Anterior corneal pigmentations, right eye | BILLABLE CODE |
| H18.012 | Anterior corneal pigmentations, left eye | BILLABLE CODE |
| H18.013 | Anterior corneal pigmentations, bilateral | BILLABLE CODE |
| H18.019 | Anterior corneal pigmentations, unspecified eye | BILLABLE CODE |
| H18.02 | Argentous corneal deposits | NON-BILLABLE CODE |
| H18.021 | Argentous corneal deposits, right eye | BILLABLE CODE |
| H18.022 | Argentous corneal deposits, left eye | BILLABLE CODE |
| H18.023 | Argentous corneal deposits, bilateral | BILLABLE CODE |
| H18.029 | Argentous corneal deposits, unspecified eye | BILLABLE CODE |
| H18.03 | Corneal deposits in metabolic disorders | NON-BILLABLE CODE |
| H18.031 | Corneal deposits in metabolic disorders, right eye | BILLABLE CODE |
| H18.032 | Corneal deposits in metabolic disorders, left eye | BILLABLE CODE |
| H18.033 | Corneal deposits in metabolic disorders, bilateral | BILLABLE CODE |
| H18.039 | Corneal deposits in metabolic disorders, unspecified eye | BILLABLE CODE |
| H18.04 | Kayser-Fleischer ring | NON-BILLABLE CODE |
| H18.041 | Kayser-Fleischer ring, right eye | BILLABLE CODE |
| H18.042 | Kayser-Fleischer ring, left eye | BILLABLE CODE |
| H18.043 | Kayser-Fleischer ring, bilateral | BILLABLE CODE |
| H18.049 | Kayser-Fleischer ring, unspecified eye | BILLABLE CODE |
| H18.05 | Posterior corneal pigmentations | NON-BILLABLE CODE |
| H18.051 | Posterior corneal pigmentations, right eye | BILLABLE CODE |
| H18.052 | Posterior corneal pigmentations, left eye | BILLABLE CODE |
| H18.053 | Posterior corneal pigmentations, bilateral | BILLABLE CODE |
| H18.059 | Posterior corneal pigmentations, unspecified eye | BILLABLE CODE |
| H18.06 | Stromal corneal pigmentations | NON-BILLABLE CODE |
| H18.061 | Stromal corneal pigmentations, right eye | BILLABLE CODE |
| H18.062 | Stromal corneal pigmentations, left eye | BILLABLE CODE |
| H18.063 | Stromal corneal pigmentations, bilateral | BILLABLE CODE |
| H18.069 | Stromal corneal pigmentations, unspecified eye | BILLABLE CODE |
