Poisoning by barbiturates, undetermined, subs encntr

This code signifies a poisoning event involving barbiturates where the intent (accidental, intentional self-harm, assault) cannot be determined. The "subsequent encounter" indicates that the patient is receiving follow-up care for the sequelae of the poisoning after the initial treatment.

This code is appropriate for documentation of ongoing management, monitoring, or treatment of complications arising from a barbiturate poisoning when the circumstances surrounding the ingestion are unclear. It applies to encounters occurring after the acute phase of treatment, such as follow-up appointments, rehabilitation, or further diagnostic workup related to the poisoning.

• Always sequence this code after the primary diagnosis for the specific manifestation or complication of the poisoning.
• Ensure documentation clearly supports the "undetermined" intent and the "subsequent encounter" status.
• Do not use for initial acute care; refer to the appropriate initial encounter code for the poisoning.