F81.2 Mathematics disorder

Billable ICD-10-CM code, FY2026.

Applicable to

• Developmental acalculia
• Developmental arithmetical disorder
• Developmental Gerstmann's syndrome
• Specific learning disorder, with impairment in mathematics

Excludes1 (never code together)

• acalculia NOS (R48.8)

Excludes2 (not included here)

• arithmetical difficulties associated with a reading disorder (F81.0)
• arithmetical difficulties associated with a spelling disorder (F81.81)
• arithmetical difficulties due to inadequate teaching (Z55.8)

MS-DRG index

Defines the logic of DRG(s) 886 in MDC 19.

Approximate ICD-9-CM (GEMs)

• 315.1 Mathematics disorder

Code annotations containing back-references to F81.2

Back-references to F81

• Code Also: G93.45 Developmental and epileptic encephalopathy ("developmental disorders of scholastic skills (F81.-)")
• Type 1 Excludes: R48 Dyslexia and other symbolic dysfunctions, not elsewhere classified ("specific developmental disorders of scholastic skills (F81.-)")
• Code Also: Z15.1 Genetic susceptibility to epilepsy and neurodevelopmental disorders ("developmental disorders of scholastic skills (F81.-)")
• Type 1 Excludes: Z55 Problems related to education and literacy ("disorders of psychological development (F80-F89)")

Diagnosis Index entries for F81.2

• Acalculia › developmental
• Development › delayed › arithmetical skills
• Disorder (of) › developmental › arithmetical skills
• Disorder (of) › developmental › learning › arithmetical
• Disorder (of) › learning (specific) › mathematics
• Disorder (of) › learning (specific) › specified › with impairment in › mathematics
• Disorder (of) › specific › arithmetical
• Dyscalculia › developmental
• Gerstmann's syndrome › developmental

Nearby codes

• F81 Specific developmental disorders of scholastic skills
• F81.0 Specific reading disorder
• F81.2 Mathematics disorder (this code)
• F81.8 Other developmental disorders of scholastic skills
• F81.81 Disorder of written expression
• F81.89 Other developmental disorders of scholastic skills
• F81.9 Developmental disorder of scholastic skills, unspecified