Poisoning by succinimides and oxazolidinediones, undet, subs

This code signifies a poisoning event involving succinimide or oxazolidinedione anticonvulsants where the intent (accidental, intentional self-harm, assault) cannot be determined. The patient is receiving follow-up care for the sequelae or ongoing management of this poisoning.

This code is appropriate for subsequent encounters when a patient presents for continued treatment, monitoring, or evaluation related to a previously diagnosed succinimide or oxazolidinedione poisoning of unknown intent. This includes situations where the patient is experiencing lingering effects or complications from the initial exposure.

• Requires an external cause code (X42, X62, Y12) to further specify the circumstances if known, but for "undetermined," Y12 is typically used.
• The 7th character "D" indicates a subsequent encounter, meaning the patient is receiving routine care during the healing or recovery phase.
• Do not use for initial treatment of the poisoning; refer to the "A" (initial encounter) or "S" (sequela) characters as appropriate.