L66.1Lichen planopilaris
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 L60-L75
- Disorders of skin appendages
- Official Vietnamese name
- Bệnh Lichen phẳng nang lông
- Additional WHO coding guidance
- Follicular lichen planus
Related L66 codes
L66
Cicatricial alopecia [scarring hair loss]
L66.0
Primary diagnosis candidate
Pseudopelade
L66.2
Primary diagnosis candidate
Folliculitis decalvans
L66.3
Primary diagnosis candidate
Perifolliculitis capitis abscedens
L66.4
Primary diagnosis candidate
Folliculitis ulerythematosa reticulata
L66.8
Primary diagnosis candidate
Other cicatricial alopecia
L66.9
Primary diagnosis candidate
Cicatricial alopecia, 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.
