F84.9Pervasive developmental disorder, unspecified
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 phát triển lan tỏa, không xác định
Related F84 codes
F84
Pervasive developmental disorders
F84.0
Primary diagnosis candidate
Childhood autism
F84.1
Primary diagnosis candidate
Atypical autism
F84.2
Primary diagnosis candidate
Rett syndrome
F84.3
Primary diagnosis candidate
Other childhood disintegrative disorder
F84.4
Primary diagnosis candidate
Overactive disorder associated with mental retardation and stereotyped movements
F84.5
Primary diagnosis candidate
Hội chứng Asperger
F84.8
Primary diagnosis candidate
Other pervasive developmental disorders
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.
