| Code | Description |
| T37.5X1A | Poisoning by antiviral drugs, accidental (unintentional), initial encounter |
| T37.5X1D | Poisoning by antiviral drugs, accidental (unintentional), subsequent encounter |
| T37.5X1S | Poisoning by antiviral drugs, accidental (unintentional), sequela |
| T37.5X2A | Poisoning by antiviral drugs, intentional self-harm, initial encounter |
| T37.5X2D | Poisoning by antiviral drugs, intentional self-harm, subsequent encounter |
| T37.5X2S | Poisoning by antiviral drugs, intentional self-harm, sequela |
| T37.5X3A | Poisoning by antiviral drugs, assault, initial encounter |
| T37.5X3D | Poisoning by antiviral drugs, assault, subsequent encounter |
| T37.5X3S | Poisoning by antiviral drugs, assault, sequela |
| T37.5X4A | Poisoning by antiviral drugs, undetermined, initial encounter |
| T37.5X4D | Poisoning by antiviral drugs, undetermined, subsequent encounter |
| T37.5X4S | Poisoning by antiviral drugs, undetermined, sequela |
| T37.5X5A | Adverse effect of antiviral drugs, initial encounter |
| T37.5X5D | Adverse effect of antiviral drugs, subsequent encounter |
| T37.5X5S | Adverse effect of antiviral drugs, sequela |
| T37.5X6A | Underdosing of antiviral drugs, initial encounter |
| T37.5X6D | Underdosing of antiviral drugs, subsequent encounter |
| T37.5X6S | Underdosing of antiviral drugs, sequela |
| Z16.33 | Resistance to antiviral drug(s) |