Adverse effect of unsp drugs acting on muscles, subs encntr

This code signifies a patient experiencing an unintended and undesirable reaction to a medication primarily affecting muscle function, where the specific drug causing the adverse effect is not documented. The "D" in the seventh character indicates that this is a subsequent encounter for the adverse effect, meaning the patient is receiving routine care during the healing or recovery phase.

Apply this code when a patient presents for follow-up care related to an adverse drug reaction impacting their muscles, such as muscle weakness, spasms, or rigidity, and the exact drug responsible is unknown or not specified in the medical record. This is appropriate for ongoing management, monitoring, or rehabilitation after the initial treatment of the adverse effect.

• Always sequence this code after the primary diagnosis for the adverse effect itself.
• Ensure documentation clearly supports a subsequent encounter (e.g., "follow-up," "re-evaluation," "monitoring").
• If the specific drug is identified, a more specific code from the T48.2- category should be used.