ICD-10 Code F11.94 – Opioid use, unspecified with opioid-induced mood disorder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F11.94 – Opioid use, unspecified with opioid-induced mood disorder
What it is
This code identifies opioid use, unspecified, when the patient also has a mood disorder caused by opioid use. Use it when the chart supports both opioid involvement and a substance-induced mood condition.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include depressed mood, irritability, or mood instability that is linked to opioid use and not better explained by another primary mood disorder.
When to use this code
Use this code when the provider documents opioid use, but does not specify the opioid-related disorder further, and also documents an opioid-induced mood disorder. It may appear in behavioral health, emergency, or inpatient notes when the mood change is attributed to opioid use.
Code it only when the record clearly connects the mood disorder to opioid use. If the documentation is incomplete or the cause is uncertain, check documentation before assigning the code.
Do not use for
Do not use this code for a primary mood disorder unrelated to substance use, or for opioid use without a documented opioid-induced mood disorder. Check documentation if the substance relationship is not stated.
Coding tip
Confirm that the provider explicitly links the mood disorder to opioid use before assigning F11.94.