Adverse effect of drug aff the autonm nervous sys, sequela

This code signifies a long-term or residual adverse effect resulting from a drug that primarily impacts the autonomic nervous system. These effects manifest after the acute phase of the adverse reaction has passed, indicating a persistent health problem attributable to the medication.

Apply this code when a patient presents with a chronic or lasting condition, such as persistent orthostatic hypotension, chronic urinary retention, or ongoing dry mouth, that is documented as a sequela of a previously administered autonomic nervous system-affecting drug. This is appropriate for conditions that are no longer acute but continue to require management due to the prior drug exposure.

• Always sequence this code after the code(s) for the specific manifestation(s) of the sequela.
• Ensure documentation clearly links the current chronic condition to a past adverse drug effect on the autonomic nervous system.
• Do not use for acute adverse effects; reserve for conditions documented as "sequela," "late effect," or "residual."