Underdosing of butyrophen/thiothixen neuroleptics, subs

This code signifies a patient receiving an insufficient amount of neuroleptic medication from the butyrophenone or thiothixene classes, such as haloperidol or fluphenazine, during a follow-up visit. This underdosing can lead to a recurrence or worsening of the psychiatric symptoms these medications are intended to treat.

Apply this code when documentation indicates a patient is not receiving the prescribed or therapeutically effective dose of a butyrophenone or thiothixene neuroleptic, and this is identified during an outpatient visit, readmission for symptom exacerbation, or other follow-up care. This often occurs when a patient self-reduces their dose, misses doses, or the prescribed dose is found to be inadequate.

• Always sequence this code after the primary diagnosis for the condition being treated (e.g., schizophrenia).
• Ensure documentation clearly specifies "underdosing" and identifies the drug class (butyrophenone or thiothixene neuroleptics).
• The "D" seventh character indicates a subsequent encounter, meaning the patient is receiving routine care during the healing or recovery phase.