Adverse effect of antiparkns drug/centr musc-tone depr, subs

This code signifies an undesirable or harmful reaction experienced by a patient due to the therapeutic use of antiparkinsonism medications or other central muscle-tone depressants, occurring during a follow-up visit after the initial treatment of the adverse effect. It indicates that the patient is still receiving care for the adverse drug event.

Apply this code when a patient presents for ongoing management, monitoring, or treatment of an adverse effect caused by antiparkinsonism drugs or other central muscle-tone depressants. This includes situations where the patient is being seen for complications, adjustments to therapy, or resolution of symptoms related to the initial adverse reaction.

• Always sequence the adverse effect code first, followed by codes for the specific manifestations of the adverse effect.
• Ensure documentation clearly specifies the drug causing the adverse effect and that the encounter is for subsequent care.
• Distinguish from poisoning (T36-T50 with 1st or 2nd character 1-4) which implies overdose, wrong substance, or non-medicinal substance.