L50.1Idiopathic urticaria
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 XII
- Diseases of the skin and subcutaneous tissue
- Group L50-L54
- Urticaria and erythema
- Official Vietnamese name
- Bệnh mày đay vô căn
Related L50 codes
L50
Urticaria
L50.0
Primary diagnosis candidate
Allergic urticaria
L50.2
Primary diagnosis candidate
Urticaria due to cold and heat
L50.3
Primary diagnosis candidate
Dermatographic urticaria
L50.4
Primary diagnosis candidate
Vibratory urticaria
L50.5
Primary diagnosis candidate
Cholinergic urticaria
L50.6
Primary diagnosis candidate
Contact urticaria
L50.8
Primary diagnosis candidate
Other urticaria
L50.9
Primary diagnosis candidate
Urticaria, 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.
