F50.1Atypical anorexia nervosa
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
- Official Vietnamese name
- Chán ăn tâm thần không điển hình
- Additional WHO coding guidance
- Disorders that fulfil some of the features of anorexia nervosa but in which the overall clinical picture does not justify that diagnosis. For instance, one of the key symptoms, such as amenorrhoea or marked dread of being fat, may be absent in the presence of marked weight loss and weight-reducing behaviour. This diagnosis should not be made in the presence of known physical disorders associated with
Related F50 codes
F50
Eating disorders
F50.0
Primary diagnosis candidate
Anorexia nervosa
F50.2
Primary diagnosis candidate
Bulimia nervosa
F50.3
Primary diagnosis candidate
Atypical bulimia nervosa
F50.4
Primary diagnosis candidate
Overeating associated with other psychological disturbances
F50.5
Primary diagnosis candidate
Vomiting associated with other psychological disturbances
F50.8
Primary diagnosis candidate
Other eating disorders
F50.9
Primary diagnosis candidate
Eating disorder, 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.
