F90.8 – Attention-deficit hyperactivity disorder, other type

F90.8 – Attention-deficit hyperactivity disorder, other type

Discover F90.8 - ADHD, other type. Gain insights into its clinical significance, billability, related ICD-10-CM codes, synonyms, and more.

By Ericka Pingol on Jul 16, 2025.

Fact Checked by Karina Jimenea.

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F90.8 diagnosis code: Attention-deficit hyperactivity disorder, other type

The World Health Organization's ICD 10 lists F90.8 to classify presentations of attention-deficit hyperactivity disorder (ADHD) that do not clearly fall under the predominantly inattentive type (F90.0), predominantly hyperactive type (F90.1), or combined type (F90.2). It includes atypical forms or variants of ADHD that still meet the general diagnostic criteria but present differently.

Is F90.8 billable?

Yes, F90.8 is a billable code. This implies that it can be used in a medical claim for insurance reimbursement purposes. To ensure correct billing, it must be employed explicitly for 'Attention-deficit hyperactivity disorder, other type.

Clinical information

  • ADHD is a neurodevelopmental condition that typically begins in early childhood and can persist into adolescence and adulthood. It is characterized by symptoms of inattention, hyperactivity, and impulsivity, which can affect a child’s behavior, learning, and academic achievement.
  • When diagnosing ADHD, clinicians must consider the presence of other mental disorders and mental health disorders, as ADHD frequently coexists with conditions such as conduct disorder, pervasive developmental disorders, and unspecified emotional disorders. These comorbidities can mask or mimic ADHD symptoms, making accurate diagnosis more complex.
  • Apart from using the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders criteria for ADHD, a careful assessment of the child’s family context is also essential for ADHD diagnosis, as family dynamics, parenting styles, and stressors can influence how symptoms are expressed and managed at home.
  • Early diagnosis allows for timely interventions that can improve outcomes across the board, including school performance, peer relationships, and emotional development. By recognizing ADHD as part of a broader picture of neurodevelopment and comorbid challenges, clinicians can create more effective and holistic care plans.

Synonyms include:

  • Attention-deficit disorder
  • Hyperkinetic syndrome
  • Hyperkinetic disorders
  • ADHD NOS (Not otherwise specified)
  • Family context conduct disorder

Other ICD-10 codes commonly used for ADHD

  • F90.0: Attention-deficit hyperactivity disorder, predominantly inattentive type
  • F90.1: Attention-deficit hyperactivity disorder, predominantly hyperactive type
  • F90.2: Attention-deficit hyperactivity disorder, combined type
  • F90.9: Attention-deficit hyperactivity disorder, unspecified type
  • F98.8: Other specified behavioral and emotional disorders with onset usually occurring in childhood and adolescence

Related ICDs

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