F90.0 Attention-deficit hyperactivity disorder, predominantly inattentive type

Name of the Condition

• Common Name: Attention-Deficit Hyperactivity Disorder, Predominantly Inattentive Type
• Technical/Medical Term: Attention-Deficit Hyperactivity Disorder, Predominantly Inattentive Type

Summary

Attention-deficit hyperactivity disorder, predominantly inattentive type (ADHD-I) is a neurodevelopmental condition marked by persistent inattention that interferes with functioning or development. Symptoms of inattention are more prominent than hyperactivity or impulsivity. The condition is diagnosed when symptoms are inconsistent with the individual's developmental level and occur across multiple settings, such as home, school, or work.

Causes

The exact cause of ADHD-I is not fully understood, but it is believed to involve a combination of genetic, neurological, and environmental factors. Research suggests that differences in brain structure and function, particularly in areas related to attention and executive function, may contribute to the condition. Genetic factors play a significant role, as ADHD often runs in families.

Risk Factors

• Family history of ADHD or other mental health disorders
• Premature birth or low birth weight
• Exposure to environmental toxins (e.g., lead) during pregnancy or early childhood
• Maternal smoking, alcohol use, or drug use during pregnancy
• Brain injuries

Symptoms

• Inattention: Difficulty sustaining focus, frequent careless mistakes, poor listening skills, disorganization, forgetfulness in daily activities
• Avoidance of tasks requiring sustained mental effort
• Easily distracted by extraneous stimuli
• Loss of items necessary for tasks or activities

Diagnosis

Diagnosis involves a comprehensive evaluation, including clinical assessment of symptoms, personal and family medical history, and input from multiple informants (e.g., parents, teachers). Symptoms must be present before age 12, occur in at least two settings, and significantly impair functioning. ruling out other conditions (e.g., anxiety, learning disorders) is essential.

Treatment Options

Treatment typically includes behavioral therapy, educational support, and, in some cases, medication (e.g., stimulants or non-stimulants). Interventions are tailored to the individual's needs and may involve parent training, classroom accommodations, or organizational skills training.

Prognosis and Follow-Up

With appropriate management, many individuals with ADHD-I can achieve functional improvement. Symptoms may persist into adulthood, but treatment can help mitigate impairments. Regular follow-up is important to monitor symptom control, adjust interventions, and address co-occurring conditions.

Complications

• Academic or occupational difficulties
• Relationship problems
• Increased risk of anxiety or depression
• Substance use disorders (in some cases)

Lifestyle & Prevention

• Establishing structured routines and environments
• Using organizational tools (e.g., planners, reminders)
• Encouraging regular physical activity and adequate sleep
• Minimizing distractions during tasks

When to Seek Professional Help

Seek evaluation if inattention symptoms consistently interfere with daily functioning, academic performance, or social relationships, or if concerns arise about co-occurring conditions (e.g., anxiety, learning disabilities).

Tips for Medical Coders

Document the presence and duration of inattentive symptoms, their impact on functioning, and any comorbid conditions. Ensure documentation supports the predominance of inattention over hyperactivity/impulsivity. Include details about symptom onset, settings, and ruling out other causes to justify the diagnosis.