ICD-10 Code F48.9 – Nonpsychotic mental disorder, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F48.9 – Nonpsychotic mental disorder, unspecified
What it is
F48.9 is a nonspecific ICD-10-CM code for a nonpsychotic mental disorder when the record does not identify a more precise diagnosis. Use it when the documentation confirms a mental disorder without psychosis, but details are limited.
Clinical signs
Clinical features vary; refer to documentation. Records may describe anxiety, distress, somatic complaints, or other nonpsychotic symptoms, but not hallucinations or delusions.
When to use this code
Use F48.9 when the provider documents a nonpsychotic mental disorder and the chart does not support a more specific code. It is appropriate for vague or incomplete diagnoses, such as “nonpsychotic mental disorder” or similar wording. Check documentation if the condition is better classified elsewhere.
Do not use for
Do not use this code for psychotic disorders, mood disorders with a more specific diagnosis, or anxiety conditions that are documented clearly enough for a specific code. Avoid it when the record names a defined disorder.
Coding tip
Code the most specific documented mental disorder first; use F48.9 only when the provider’s note lacks enough detail for a better option.