Adverse effect of cannabis, subsequent encounter

This code signifies a patient presenting with an adverse reaction to cannabis during a follow-up visit. This could include symptoms such as anxiety, paranoia, psychosis, or cardiovascular effects that are directly attributable to cannabis use. The "subsequent encounter" indicates that the initial treatment for the adverse effect has already been provided.

Use this code when a patient returns for ongoing management or evaluation of an adverse effect from cannabis, after the initial encounter where the adverse effect was first identified and treated. This applies to situations where the patient is being monitored for resolution of symptoms, or for further intervention related to the cannabis-induced adverse event.

• Always sequence this code after the primary diagnosis describing the specific adverse effect (e.g., F12.921 for cannabis-induced psychotic disorder with delusions).
• Ensure documentation clearly links the adverse effect to cannabis use and indicates a follow-up visit.
• Distinguish from initial encounters (use A suffix) or sequela (use S suffix) for adverse effects.