Adverse effect of unsp drugs acting on muscles, sequela

This code signifies a long-term or residual condition resulting from an unintended and harmful reaction to a medication that primarily affects muscle function. The specific drug causing the adverse effect is not identified, and the manifestation of the adverse effect is no longer acute but rather a lasting consequence.

Apply this code when documenting a chronic or permanent sequela (e.g., persistent muscle weakness, spasticity, or atrophy) that is directly attributable to a past adverse drug reaction involving a muscle-acting agent, and the specific drug is unknown. This is used when the acute phase of the adverse effect has resolved, but the patient continues to experience related symptoms.

• Always sequence this code after the code(s) for the specific sequela being treated (e.g., muscle weakness, spasticity).
• Only use this code when the specific drug causing the adverse effect is not documented or cannot be determined.
• Ensure documentation clearly links the current sequela to a past adverse drug event involving a muscle-acting medication.