L43 – Lichen planus
ICD-10-CM 2027 diagnosis code · Papulosquamous disorders
ICD-10-CM code
L43
- Code
L43(claims format:L43)- Description
- Lichen planus
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 12. Diseases of the skin and subcutaneous tissue (L00-L99)
- Block
- L40-L45 Papulosquamous disorders
Billable codes under L43
L43 is a header code and cannot be used on claims. Choose the most specific code:
- L43.0 – Hypertrophic lichen planusBillable
- L43.1 – Bullous lichen planusBillable
- L43.2 – Lichenoid drug reactionBillable
- L43.3 – Subacute (active) lichen planusBillable
- L43.8 – Other lichen planusBillable
- L43.9 – Lichen planus, unspecifiedBillable
Notes for L43
Excludes1 (not coded here):
- lichen planopilaris (L66.1-)
Frequently asked questions
What is ICD-10 code L43?
L43 is the ICD-10-CM code for lichen planus, in the block L40-L45 (Papulosquamous disorders).
Is L43 a billable code?
No. L43 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.