ADHD Combined Type Diagnostic Criteria
For ADHD combined presentation, you need at least 6 inattention symptoms AND at least 6 hyperactivity/impulsivity symptoms in children up to age 16, or at least 5 symptoms in each domain for individuals 17 years and older. 1
Specific Symptom Requirements
The DSM-5 criteria, which form the basis of the 2019 AAP clinical practice guideline, define ADHD combined presentation (ADHD/C) as requiring:
Children and adolescents (up to age 16):
- ≥6 out of 9 inattention criteria
- ≥6 out of 9 hyperactivity/impulsivity criteria
Adolescents and adults (age 17+):
- ≥5 out of 9 inattention criteria
- ≥5 out of 9 hyperactivity/impulsivity criteria
Critical Additional Requirements
Beyond meeting the symptom count thresholds, you must also document:
- Symptoms present in more than 1 major setting (social, academic, or occupational)
- Information obtained from multiple sources (parents/guardians, teachers, other school personnel, mental health clinicians)
- Alternative causes ruled out
- Functional impairment documented
Important Clinical Caveats
Age-specific considerations: For preschool-aged children (4 years to 6th birthday), the same symptom criteria apply, though obtaining cross-setting information can be challenging if the child doesn't attend preschool or childcare. In these cases, focused checklists and information from early intervention programs can supplement the evaluation. 1
Rating scales are essential: The guideline strongly recommends using DSM-based ADHD rating scales to systematically collect information from parents and teachers, as this improves diagnostic accuracy and standardization. 1
Common pitfall: Don't diagnose based on symptom count alone—the requirement for impairment in multiple settings and ruling out alternative causes is equally critical to avoid overdiagnosis. 1