F81.1Specific spelling disorder
Code usage status
Primary diagnosis
May be used as the primary diagnosis
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Complete code in the classification
Use when the diagnosis matches and no exclusion applies.
- Chapter V
- Mental and behavioural disorders
- Group F80-F89
- Disorders of psychological development
- Official Vietnamese name
- Rối loạn cụ thể về đánh vần
- Additional WHO coding guidance
- The main feature is a specific and significant impairment in the development of spelling skills in the absence of a history of specific reading disorder, which is not solely accounted for by low mental age, visual acuity problems, or inadequate schooling. The ability to spell orally and to write out words correctly are both affected. Specific spelling retardation (without reading disorder) Excl.: agraphia NOS (R48.8) spelling difficulties: associated with a reading disorder (F81.0) due to inadequate teaching (Z55.8)
Related F81 codes
F81
Specific developmental disorders of scholastic skills
F81.0
Primary diagnosis candidate
Specific reading disorder
F81.2
Primary diagnosis candidate
Specific disorder of arithmetical skills
F81.3
Primary diagnosis candidate
Mixed disorder of scholastic skills
F81.8
Primary diagnosis candidate
Other developmental disorders of scholastic skills
F81.9
Primary diagnosis candidate
Developmental disorder of scholastic skills, unspecified
Clinical record checklist
View coding guide →- Confirm that the code matches the final documented diagnosis.
- Use one primary-diagnosis code and record only relevant additional conditions.
- Review Ministry indicators, inclusions, exclusions and notes.
- Do not infer a diagnosis beyond the clinical record.
2026 regulatory basis
Indicators are taken from columns 24–29 of the classification accompanying Circular 06/2026/TT-BYT, cross-referenced with Decision 1849/QĐ-BYT and Official Dispatch 4059/BYT-BH.
