F12.921

HCC Category Mapping

What This Code Means

This code describes a patient who uses cannabis in an unspecified pattern and is currently experiencing delirium (confusion, disorientation, and altered mental state) due to cannabis intoxication. Delirium is a serious acute mental state where the person is confused about time, place, or identity.

Coding Tips

• •Use this code only when documentation clearly indicates both cannabis use and active delirium symptoms caused by intoxication; do not use if the delirium is from another cause
• •The 'unspecified' component means the pattern of use (occasional, regular, or dependent) is not documented; if use disorder severity is documented, consider codes F12.121 (mild), F12.221 (moderate), or F12.921 (severe) instead

Clinical Significance

Cannabis use, unspecified with intoxication delirium identifies a patient with cannabis-related intoxication delirium when the severity of the underlying use disorder is not documented. Delirium during cannabis intoxication is a serious acute condition requiring immediate medical attention. This diagnosis signals high clinical acuity regardless of whether the underlying pattern is abuse or dependence.

Documentation Requirements

• ✓Documentation of cannabis use
• ✓Acute delirium findings: confusion, disorientation, fluctuating consciousness, altered attention
• ✓Temporal relationship between cannabis use and delirium onset
• ✓Mental status examination documenting delirium
• ✓Exclusion of other causes of delirium
• ✓Vital signs and monitoring records

Commonly Confused Codes