Poisn by antiparkns drug/centr musc-tone depr, undet, sqla

This code signifies a long-term or residual effect resulting from an undetermined poisoning by antiparkinsonism medications or other central muscle-tone depressants. This means the initial acute poisoning event has resolved, but the patient continues to experience health problems directly attributable to that past exposure.

Use this code when documenting a patient's current condition that is a direct consequence of a previous poisoning by these drug classes, and the intent of the poisoning (e.g., accidental, intentional self-harm) could not be determined. This applies to follow-up encounters for chronic issues stemming from the original event.

• Always sequence this code after the code(s) for the specific sequela being treated.
• Ensure documentation clearly links the current condition to the past undetermined poisoning.
• Do not use this code for acute poisoning events; use the appropriate acute poisoning code with the 7th character for initial or subsequent encounter.