| S21.051 | Open bite of right breast | NON-BILLABLE CODE |
| S21.051A | Open bite of right breast, initial encounter | BILLABLE CODE |
| S21.051D | Open bite of right breast, subsequent encounter | BILLABLE CODE |
| S21.051S | Open bite of right breast, sequela | BILLABLE CODE |
| S21.052 | Open bite of left breast | NON-BILLABLE CODE |
| S21.052A | Open bite of left breast, initial encounter | BILLABLE CODE |
| S21.052D | Open bite of left breast, subsequent encounter | BILLABLE CODE |
| S21.052S | Open bite of left breast, sequela | BILLABLE CODE |
| S21.059 | Open bite of unspecified breast | NON-BILLABLE CODE |
| S21.059A | Open bite of unspecified breast, initial encounter | BILLABLE CODE |
| S21.059D | Open bite of unspecified breast, subsequent encounter | BILLABLE CODE |
| S21.059S | Open bite of unspecified breast, sequela | BILLABLE CODE |
