| T452X | Poisoning by, adverse effect of and underdosing of vitamins |
| T452X1 | Poisoning by vitamins, accidental (unintentional) |
| T452X1A | Poisoning by vitamins, accidental (unintentional), initial encounter |
| T452X1D | Poisoning by vitamins, accidental (unintentional), subsequent encounter |
| T452X1S | Poisoning by vitamins, accidental (unintentional), sequela |
| T452X2 | Poisoning by vitamins, intentional self-harm |
| T452X2A | Poisoning by vitamins, intentional self-harm, initial encounter |
| T452X2D | Poisoning by vitamins, intentional self-harm, subsequent encounter |
| T452X2S | Poisoning by vitamins, intentional self-harm, sequela |
| T452X3 | Poisoning by vitamins, assault |
| T452X3A | Poisoning by vitamins, assault, initial encounter |
| T452X3D | Poisoning by vitamins, assault, subsequent encounter |
| T452X3S | Poisoning by vitamins, assault, sequela |
| T452X4 | Poisoning by vitamins, undetermined |
| T452X4A | Poisoning by vitamins, undetermined, initial encounter |
| T452X4D | Poisoning by vitamins, undetermined, subsequent encounter |
| T452X4S | Poisoning by vitamins, undetermined, sequela |
| T452X5 | Adverse effect of vitamins |
| T452X5A | Adverse effect of vitamins, initial encounter |
| T452X5D | Adverse effect of vitamins, subsequent encounter |
| T452X5S | Adverse effect of vitamins, sequela |
| T452X6 | Underdosing of vitamins |
| T452X6A | Underdosing of vitamins, initial encounter |
| T452X6D | Underdosing of vitamins, subsequent encounter |
| T452X6S | Underdosing of vitamins, sequela |
| T453 | Poisoning by, adverse effect of and underdosing of enzymes |
| T453X | Poisoning by, adverse effect of and underdosing of enzymes |
| T453X1 | Poisoning by enzymes, accidental (unintentional) |
| T453X1A | Poisoning by enzymes, accidental (unintentional), initial encounter |
| T453X1D | Poisoning by enzymes, accidental (unintentional), subsequent encounter |
| T453X1S | Poisoning by enzymes, accidental (unintentional), sequela |
| T453X2 | Poisoning by enzymes, intentional self-harm |
| T453X2A | Poisoning by enzymes, intentional self-harm, initial encounter |
| T453X2D | Poisoning by enzymes, intentional self-harm, subsequent encounter |
| T453X2S | Poisoning by enzymes, intentional self-harm, sequela |
| T453X3 | Poisoning by enzymes, assault |
| T453X3A | Poisoning by enzymes, assault, initial encounter |
| T453X3D | Poisoning by enzymes, assault, subsequent encounter |
| T453X3S | Poisoning by enzymes, assault, sequela |
| T453X4 | Poisoning by enzymes, undetermined |
| T453X4A | Poisoning by enzymes, undetermined, initial encounter |
| T453X4D | Poisoning by enzymes, undetermined, subsequent encounter |
| T453X4S | Poisoning by enzymes, undetermined, sequela |
| T453X5 | Adverse effect of enzymes |
| T453X5A | Adverse effect of enzymes, initial encounter |
| T453X5D | Adverse effect of enzymes, subsequent encounter |
| T453X5S | Adverse effect of enzymes, sequela |
| T453X6 | Underdosing of enzymes |
| T453X6A | Underdosing of enzymes, initial encounter |
| T453X6D | Underdosing of enzymes, subsequent encounter |