Adverse effect of oth antipsychotics and neuroleptics, subs

This code indicates a patient is experiencing an unintended and harmful reaction to an antipsychotic medication, excluding phenothiazine-based drugs, during a follow-up visit or ongoing treatment. The adverse effect is not due to an overdose or poisoning, but rather a side effect occurring at therapeutic or subtherapeutic doses.

Use this code when a patient presents for continued management or evaluation of an adverse effect from an antipsychotic or neuroleptic medication (other than phenothiazines) after the initial treatment of the adverse effect has already occurred. This applies to situations where the patient is still experiencing symptoms or requires further monitoring related to the drug reaction.

• Always assign an additional code to specify the nature of the adverse effect (e.g., extrapyramidal symptoms, tardive dyskinesia).
• Ensure the "D" seventh character is appropriate for a subsequent encounter, indicating ongoing care for the adverse effect.
• Distinguish from initial encounters ("A") or sequela ("S") for the same adverse effect.