F18.94

HCC Category Mapping

What This Code Means

This code describes a patient with an unspecified pattern of inhalant substance use (such as huffing glue, paint thinner, or other volatile substances) who has developed a mood disorder as a direct result of the inhalant use. The mood disorder may include symptoms of depression, anxiety, or other emotional disturbances caused by the chemical effects of inhalants on the brain.

Coding Tips

• •Use this code only when the mood disorder is documented as inhalant-induced; if the mood disorder exists independently, code the mood disorder separately without the inhalant-induced relationship
• •The '94' suffix indicates unspecified inhalant use pattern; if documentation specifies mild, moderate, or severe use disorder, select the appropriate severity code (F18.1x, F18.2x, or F18.9x) instead

Clinical Significance

This code captures substance-induced mood disorder from inhalant use, where depressive, manic, or mixed mood symptoms are directly caused by the substance. Substance-induced mood disorders require differentiation from primary mood disorders for appropriate treatment planning. Accurate coding ensures proper risk adjustment and reflects the dual complexity of substance use with psychiatric comorbidity.

Documentation Requirements

• ✓Provider documentation of inhalant use, specifying the type of inhalant when known (e.g., toluene, gasoline, aerosol propellants, nitrites)
• ✓Documentation of substance use pattern; query provider to determine if abuse or dependence criteria are met for more specific coding
• ✓Documentation of mood disturbance (depression, mania, or mixed features) with explicit provider statement linking the mood disorder to the substance use
• ✓Temporal relationship establishing mood symptoms developed during or within one month of substance intoxication or withdrawal
• ✓Assessment and plan addressing the substance use disorder with treatment approach documented

Commonly Confused Codes