ICD-10 F81.2
Billable / SpecificMathematics disorder
About ICD-10-CM F81.2
ICD-10-CM code F81.2 represents Mathematics disorder. This is a billable/specific code in the Mental, Behavioral, and Neurodevelopmental chapter (block F81). The 2026 edition of ICD-10-CM F81.2 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under F81.2. Per CMS ICD-10-CM Tabular 2026.
- Developmental acalculia
- Developmental arithmetical disorder
- Developmental Gerstmann's syndrome
- Specific learning disorder, with impairment in mathematics
Type 1 Excludes
Pure excludes, these codes can never be coded together with F81.2. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- acalculia NOS (R48.8)
Type 2 Excludes
Not included here, the excluded code is not part of F81.2, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- 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)
Medicare LCD Coverage for F81.2
Local Coverage Determinations (LCDs) from CMS MACs that list F81.2 as a covered diagnosis.
Showing top 10 of 369 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing F81.2.
5 Medicare
CPT Codes Commonly Billed with F81.2
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Convert F81.2 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| F81.2 | 3151 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To F81.2
Other codes in section F80-F89 (Pervasive and specific developmental disorders).
ICD-10 F81.2, Billing FAQ
Is ICD-10 code F81.2 billable? +
Yes, F81.2 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to F81.2? +
ICD-10 F81.2 includes: Developmental acalculia; Developmental arithmetical disorder; Developmental Gerstmann's syndrome, and 1 more clinical synonyms.
What codes are Type 1 Excludes for F81.2? +
Type 1 Excludes (never code together with F81.2): acalculia NOS (R48.8)
What codes are Type 2 Excludes for F81.2? +
Type 2 Excludes (may be coded together when both conditions exist): 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)
What ICD-9 codes does F81.2 map to? +
Per CMS GEMs, F81.2 maps to ICD-9 codes: 3151. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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