Toxic effect of venom of centipede/millipede, acc, subs

This code describes the adverse systemic effects resulting from an accidental envenomation by a centipede or venomous millipede. The patient is no longer in the initial acute phase of treatment but is receiving follow-up care for complications or ongoing management related to the toxic exposure.

Apply this code when a patient presents for subsequent care following an unintentional centipede or venomous millipede bite, such as for wound infection, persistent localized pain, or systemic reactions that require ongoing monitoring or treatment. This includes visits for medication adjustments, follow-up lab work, or assessment of healing after the initial encounter.

• Requires a seventh character "D" for subsequent encounter, indicating active treatment after the initial care.
• Distinguish from "A" (initial encounter) for the acute phase and "S" (sequela) for late effects.
• Always code the specific symptoms or complications resulting from the toxic effect as additional diagnoses.