ICD-11 classes
14 Diseases of the skin
Skin disorders involving certain specific body regions
Skin disorders involving the head and neck
Dermatoses of the lips or oral cavity
DA01 — Disorders of oral mucosa
EA91.4 — Lichen planus and lichenoid reactions of oral mucosa
ICD-11 EA91.4 — Lichen planus and lichenoid reactions of oral mucosa
Oral lichenoid reactions represent a common end point in response to extrinsic agents (drugs, allergens), altered self-antigens, or superantigens. Clinical presentation can vary from asymptomatic white reticular striae to painful erythema and erosions. Cutaneous and mucosal involvement of other sites is common. Although oral lichen planus is by definition idiopathic, oral lichenoid reactions may be caused by medications or exogenous agents such as cinnamates and other flavourings.
The diagnosis includes nothing.
The diagnosis excludes nothing.
Diagnosis with code EA91.4 contains 5 clarifying diagnoses:
- EA91.40 — Non-erosive lichen planus of oral mucosa
- EA91.41 — Erosive oral lichen planus
- EA91.42 — Oral lichen planus, unspecified
- EA91.43 — Lichenoid mucositis
- EA91.4Y — Other specified lichenoid reactions of oral mucosa
The diagnosis is coded elsewhere: