Poisoning by lysergide, undetermined, subsequent encounter

This code signifies a patient presenting for follow-up care related to a poisoning event involving lysergide (LSD), where the intent of the poisoning (e.g., accidental, intentional self-harm, assault) cannot be determined. The patient is no longer in the initial acute phase of treatment but is receiving ongoing management for residual effects or complications.

Apply this code for patients returning for subsequent medical attention after an initial LSD poisoning, such as for psychiatric evaluation, counseling, or management of persistent perceptual disturbances. This includes scenarios where the initial encounter for the poisoning has already been coded and billed.

• Always assign an additional code for any associated mental or behavioral disorders, such as flashbacks or psychosis, if present.
• Ensure the "D" seventh character is used only for encounters following the initial active treatment of the poisoning.
• Do not use this code for initial encounters; instead, select the appropriate acute poisoning code with an "A" seventh character.