ICD-10 Code F11.99 – Opioid use, unspecified with unspecified opioid-induced disorder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F11.99 – Opioid use, unspecified with unspecified opioid-induced disorder
What it is
This code identifies opioid use when the specific opioid is not documented and the opioid-induced disorder is not further specified. Use it when the record confirms opioid-related harm, but details are incomplete.
Clinical signs
Clinical features vary; refer to documentation. Records may note opioid use with an unspecified opioid-induced mental, physical, or behavioral disorder, but the exact manifestation is not identified.
When to use this code
Use F11.99 when the clinician documents opioid use and an opioid-induced disorder, but does not name the opioid or the disorder subtype. It also fits when the chart only supports a nonspecific opioid-related disorder and no more precise code is available. Check documentation for the exact substance and condition.
Do not use for
Do not use this code if the opioid is specified or if the opioid-induced disorder is clearly identified elsewhere in the record. Avoid it for uncomplicated opioid use without an induced disorder.
Coding tip
Query for the opioid type and the exact induced disorder before defaulting to this unspecified code.