ICD-10 Code F81.2 – Mathematics disorder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F81.2 – Mathematics disorder
What it is
F81.2 identifies a specific learning disorder affecting arithmetic skills. It is used when a person has persistent difficulty understanding numbers, learning calculation facts, or performing basic math tasks.
Clinical signs
Clinical features may include trouble with number sense, counting, memorizing math facts, or completing calculations. Clinical features vary; refer to documentation.
When to use this code
Use F81.2 when the record documents a mathematics disorder, dyscalculia, or a specific impairment in arithmetic learning. The diagnosis should reflect a learning difficulty that is not better explained by intellectual disability, sensory loss, or lack of instruction. Check documentation if the note is unclear.
Do not use for
Do not use this code for general academic underachievement, temporary school problems, or math difficulty caused by another documented condition. Do not assign it when the chart does not support a specific mathematics disorder.
Coding tip
Code F81.2 only when the provider clearly documents a mathematics-specific learning disorder.