F71Moderate mental retardation
Code usage status
Primary diagnosis
Select a more specific code
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Do not use F71 directly
Use the most specific code supported by the record.
- Chapter V
- Mental and behavioural disorders
- Group F70-F79
- Mental retardation
- Official Vietnamese name
- Chậm phát triển trí tuệ trung bình
- Additional WHO coding guidance
- [See before F70 for subdivisions] Approximate IQ range of 35 to 49 (in adults, mental age from 6 to under 9 years). Likely to result in marked developmental delays in childhood but most can learn to develop some degree of independence in self- care and acquire adequate communication and academic skills. Adults will need varying degrees of support to live and work in the community. Incl.: moderate mental subnormality
Related F71 codes
F71.0
Primary diagnosis candidate
Moderate mental retardation, with the statement of no, or minimal, impairment of behaviour
F71.1
Primary diagnosis candidate
Moderate mental retardation, significant impairment of behaviour requiring attention or treatment
F71.8
Primary diagnosis candidate
Moderate mental retardation, other impairments of behaviour
F71.9
Primary diagnosis candidate
Moderate mental retardation, without mention of impairment of behaviour
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.
