| T56.1X1 | Toxic effect of mercury and its compounds, accidental (unintentional) | NON-BILLABLE CODE |
| T56.1X1A | Toxic effect of mercury and its compounds, accidental (unintentional), initial encounter | BILLABLE CODE |
| T56.1X1D | Toxic effect of mercury and its compounds, accidental (unintentional), subsequent encounter | BILLABLE CODE |
| T56.1X1S | Toxic effect of mercury and its compounds, accidental (unintentional), sequela | BILLABLE CODE |
| T56.1X2 | Toxic effect of mercury and its compounds, intentional self-harm | NON-BILLABLE CODE |
| T56.1X2A | Toxic effect of mercury and its compounds, intentional self-harm, initial encounter | BILLABLE CODE |
| T56.1X2D | Toxic effect of mercury and its compounds, intentional self-harm, subsequent encounter | BILLABLE CODE |
| T56.1X2S | Toxic effect of mercury and its compounds, intentional self-harm, sequela | BILLABLE CODE |
| T56.1X3 | Toxic effect of mercury and its compounds, assault | NON-BILLABLE CODE |
| T56.1X3A | Toxic effect of mercury and its compounds, assault, initial encounter | BILLABLE CODE |
| T56.1X3D | Toxic effect of mercury and its compounds, assault, subsequent encounter | BILLABLE CODE |
| T56.1X3S | Toxic effect of mercury and its compounds, assault, sequela | BILLABLE CODE |
| T56.1X4 | Toxic effect of mercury and its compounds, undetermined | NON-BILLABLE CODE |
| T56.1X4A | Toxic effect of mercury and its compounds, undetermined, initial encounter | BILLABLE CODE |
| T56.1X4D | Toxic effect of mercury and its compounds, undetermined, subsequent encounter | BILLABLE CODE |
| T56.1X4S | Toxic effect of mercury and its compounds, undetermined, sequela | BILLABLE CODE |
