| T65.821 | Toxic effect of harmful algae and algae toxins, accidental (unintentional) | NON-BILLABLE CODE |
| T65.821A | Toxic effect of harmful algae and algae toxins, accidental (unintentional), initial encounter | BILLABLE CODE |
| T65.821D | Toxic effect of harmful algae and algae toxins, accidental (unintentional), subsequent encounter | BILLABLE CODE |
| T65.821S | Toxic effect of harmful algae and algae toxins, accidental (unintentional), sequela | BILLABLE CODE |
| T65.822 | Toxic effect of harmful algae and algae toxins, intentional self-harm | NON-BILLABLE CODE |
| T65.822A | Toxic effect of harmful algae and algae toxins, intentional self-harm, initial encounter | BILLABLE CODE |
| T65.822D | Toxic effect of harmful algae and algae toxins, intentional self-harm, subsequent encounter | BILLABLE CODE |
| T65.822S | Toxic effect of harmful algae and algae toxins, intentional self-harm, sequela | BILLABLE CODE |
| T65.823 | Toxic effect of harmful algae and algae toxins, assault | NON-BILLABLE CODE |
| T65.823A | Toxic effect of harmful algae and algae toxins, assault, initial encounter | BILLABLE CODE |
| T65.823D | Toxic effect of harmful algae and algae toxins, assault, subsequent encounter | BILLABLE CODE |
| T65.823S | Toxic effect of harmful algae and algae toxins, assault, sequela | BILLABLE CODE |
| T65.824 | Toxic effect of harmful algae and algae toxins, undetermined | NON-BILLABLE CODE |
| T65.824A | Toxic effect of harmful algae and algae toxins, undetermined, initial encounter | BILLABLE CODE |
| T65.824D | Toxic effect of harmful algae and algae toxins, undetermined, subsequent encounter | BILLABLE CODE |
| T65.824S | Toxic effect of harmful algae and algae toxins, undetermined, sequela | BILLABLE CODE |
