Underdosing of cannabis, initial encounter

This code signifies a patient experiencing adverse effects or complications due to taking less cannabis than prescribed or intended. It indicates that the underdosing event is the initial presentation for care.

Apply this code when a patient presents with symptoms such as withdrawal, worsening of a condition previously managed by cannabis, or inadequate therapeutic effect, directly attributable to insufficient cannabis intake. This is appropriate for the first time the patient is seen for this specific underdosing event.

• Always assign an additional code for the specific manifestation or adverse effect of the underdosing.
• Distinguish from poisoning (overdosing) or adverse effects from correct dosage, which use different code ranges.
• Ensure documentation clearly supports underdosing as the cause and that this is the initial encounter for this specific event.