ICD-10 Code F98.9 – Unspecified behavioral and emotional disorders with onset usually occurring in childhood and adolescence (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F98.9 – Unspecified behavioral and emotional disorders with onset usually occurring in childhood and adolescence
What it is
F98.9 identifies a behavioral or emotional disorder beginning in childhood or adolescence when the record does not specify a more exact diagnosis. Use it when documentation supports the general category but lacks detail.
Clinical signs
Clinical features vary; refer to documentation. You may see emotional, behavioral, or self-regulation problems that started early in life, but the chart does not define the specific disorder.
When to use this code
Use this code when the provider documents an unspecified childhood-onset behavioral or emotional disorder and no narrower diagnosis is available. It is appropriate for incomplete records, brief assessments, or encounters where the exact condition remains under evaluation.
Choose the most specific code if the note names a distinct disorder, such as a tic, elimination disorder, or other defined childhood condition. If the documentation is vague, code what is written and check documentation.
Do not use for
Do not use F98.9 when the record clearly identifies a specific behavioral or emotional disorder. Do not use it as a substitute for missing documentation if the provider can clarify the diagnosis.
Coding tip
Before assigning F98.9, look for a more specific childhood-onset code in the same category.