ICD-10 Code F18.91 – Inhalant use, unspecified, in remission (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F18.91 – Inhalant use, unspecified, in remission
What it is
Use F18.91 when the record documents inhalant use disorder, but the specific inhalant is not named and the condition is in remission. It indicates a past disorder that is not currently active.
Clinical signs
Clinical features vary; refer to documentation. In remission usually means the patient no longer meets active-use criteria, though a history of craving, loss of control, or prior impairment may be noted.
When to use this code
Assign this code when the provider clearly documents inhalant use disorder as “in remission” and does not identify the substance more specifically. Use it for follow-up visits, history review, or behavioral health notes that confirm remission status. Check documentation if active use is also mentioned.
Do not use for
Do not use this code for active inhalant use, intoxication, or withdrawal. Also avoid it when the chart names a more specific inhalant-related diagnosis or when remission is not documented.
Coding tip
Code the remission status only when it is explicitly documented; otherwise, check documentation before assigning F18.91.