ICD-10 Code F18.929 – Inhalant use, unspecified with intoxication, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F18.929 – Inhalant use, unspecified with intoxication, unspecified
What it is
This code identifies inhalant use disorder when the substance is not specified and the patient is currently intoxicated, but the intoxication details are not documented. Use it when the record confirms inhalant-related intoxication without further clarification.
Clinical signs
Clinical features vary; refer to documentation. Typical intoxication may include altered behavior, impaired coordination, slurred speech, or confusion after inhalant exposure.
When to use this code
Use F18.929 when the clinician documents inhalant use with intoxication and does not specify the inhalant type or the intoxication presentation. It also fits cases where the note states intoxication but gives no additional detail. Check documentation if the record suggests a different substance or a more specific diagnosis.
Do not use for
Do not use this code for inhalant use without intoxication, or when the substance is named and a more specific code is available. Do not assign it if the chart documents another cause of altered mental status.
Coding tip
Code the highest level of documented specificity, and query the provider if inhalant type or intoxication details are missing.