Hallucinogen dependence, in remission

This code signifies a patient's historical diagnosis of hallucinogen dependence, where the full diagnostic criteria for dependence have not been met for at least 12 months, or for any period of time if the individual is in a controlled environment. It indicates a period of sustained abstinence or significantly reduced use following a prior period of dependence.

Apply this code when documentation clearly states a history of hallucinogen dependence and the patient is currently in a state of remission. This is typically supported by a clinician's assessment noting a lack of current hallucinogen use or a sustained period of non-problematic use after meeting dependence criteria.

• Always confirm the specific hallucinogen if documented (e.g., LSD, PCP) to ensure no more specific code is available, though this code is for unspecified hallucinogens.
• Distinguish from "in partial remission" (F16.22) or "in sustained remission" (F16.24) if the documentation specifies those states.
• Ensure the documentation explicitly states "remission" or provides sufficient detail to infer remission status, such as a specified period of abstinence.