Quick reference
- When to use
- Use F90.9 when the client meets diagnostic criteria for ADHD, Unspecified. For ADHD, confirm symptom presence before age 12. For ASD, document early developmental history. Obtain collateral information when possible.
- Duration
- These are chronic, lifelong conditions. ADHD symptoms must have been present before age 12 with current impairment in 2+ settings. ASD symptoms must be present in early development. Reassess annually for treatment planning.
- Session codes
- Pair with CPT 90791 (comprehensive evaluation), 90834/90837 (therapy), 96127 (screening tools like Vanderbilt, ASRS). Neuropsychological testing: 96136/96137. Parent training: 90847.
- Key indicators
- ADHD: inattention, hyperactivity, impulsivity across settings • ASD: social communication deficits, restricted/repetitive behaviors • Onset in developmental period • Functional impairment across settings
What F90.9 represents
Used when ADHD symptoms are clearly present but insufficient information exists to determine the specific presentation type (inattentive, hyperactive-impulsive, or combined).
Key diagnostic criteria
ADHD symptoms present but specific presentation not yet determined. Typically used during initial evaluation.
Documentation essentials
Document observed symptoms and plan for comprehensive assessment to determine presentation type.
Differential diagnosis
Same as other ADHD codes. Complete assessment should follow.
Treatment planning
Initial interventions while completing assessment. Behavioral strategies applicable across types.
Insurance & billing
Acceptable for initial evaluation. Update to specific presentation code.
Updates & changes
No significant changes expected.
Documentation pitfalls
Update to specific presentation code after thorough assessment.
References
- American Psychiatric Association. (2022). Diagnostic and Statistical Manual of Mental Disorders (5th ed., text rev.).