L43 ICD-10-CA category: Lichen planus
L43 isn’t a code on its own. Choose one of the 6 codes beneath it, the one the documentation supports.
Official description
L43Lichen planus
ICD-10-CA · Canada
Codes in L43
L43 isn’t a code on its own. Open the code that matches what the note documents.
Notes for L43
As CIHI prints them, with any note L43 takes from the headings above it.
Excludes
Conditions classified elsewhere.
- Lichen planopilaris (L66.1)
- Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)lipomelanotic reticulosis (I89.8)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)systemic connective tissue disorders (M30-M36)From Chapter 12: Diseases of the skin and subcutaneous tissue (L00-L99)
Where L43 sits
- 1ChapterChapter 12: Diseases of the skin and subcutaneous tissue (L00-L99)
- 2Block L40-L45Papulosquamous disorders
- 3Category L43Lichen planus
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
Is L43 a valid ICD-10-CA code?
No. L43 (Lichen planus) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 6 codes; record the one the documentation supports.
Where is L43 in ICD-10-CA?
L43 sits under L40-L45 Papulosquamous disorders, within Chapter 12: Diseases of the skin and subcutaneous tissue (L00-L99).
What coding notes apply to L43?
ICD-10-CA lists Excludes notes for L43, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.