ICD-10 Code F18.90 – Inhalant use, unspecified, uncomplicated (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F18.90 – Inhalant use, unspecified, uncomplicated
What it is
F18.90 identifies inhalant use when the specific substance is not named and the case is uncomplicated. Use it for documented inhalant use without a related intoxication, dependence, withdrawal, or other complication.
Clinical signs
Clinical features vary; refer to documentation. Records may note inhalant use, recent exposure, or behavioral concerns, but this code does not require a specific symptom pattern.
When to use this code
Use this code when the provider documents inhalant use and does not specify the inhalant type. It also fits when the record states uncomplicated use and no additional diagnosis is supported. If the chart mentions intoxication, abuse, dependence, or a substance-induced disorder, check documentation before coding.
Do not use for
Do not use F18.90 for inhalant intoxication, inhalant dependence, or inhalant-induced mental or physical disorders. Also avoid it when the substance is identified and a more specific code is documented.
Coding tip
Code only what the provider documents, and query when “inhalant use” is present but uncomplicated status or substance type is unclear.