L43.9
BillableLichen planus, unspecified
Lichen planus, unspecified
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations, and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •lipomelanotic reticulosisI89.8
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •systemic connective tissue disordersM30-M36
- •viral wartsB07
Related Codes(5)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(128)
SNOMED CT
- LP - Lichen planus4776004
- Lichen planus4776004
- Ruber planus4776004
- Lichen planus linearis44509000
- Linear lichen planus44509000
- Detachment of nail plate75789001
- Onycholysis75789001
- Separation of nail plate75789001
- Postinflammatory skin pigmentation change95348005
- Pterygium of nail110987009
- OLP - Oral lichen planus235049008
- Oral lichen planus235049008
- Lichen planus of vulva237112004
- Guttate lichen planus238647005
- Papular lichen planus238647005
- Post-inflammatory hyperpigmentation in lichen planus238649008
- Lichen planus erythematosus238652000
- Lichen planus with lupus erythematosus238652000
- Lichen planus-lupus erythematosus overlap238652000
- Site-specific lichen planus238654004
- Lichen planopilaris of scalp238655003
- Lichen planus of scalp238655003
- Lichen planus of palms and soles238656002
- Lichen planus of nail238658001
- Nail pterygium in lichen planus238659009
- Lichen planus of tongue238665009
- Lichen planus of lips238666005
- Genital lichen planus238668006
- Lichen planus of penis238670002
- Lichen planus of glans penis238671003
- Post-inflammatory hypermelanosis238699007
- Post-inflammatory hyperpigmentation238699007
- Postinflammatory hyperpigmentation238699007
- Atrophia unguium276458009
- Atrophy of nail276458009
- Onychatrophia276458009
- Onychoatrophy276458009
- Overlap syndrome276657008
- Eruption of vulva289482006
- Rash of vulva289482006
- Vulval rash289482006
- Eruption of female perineum289857000
- Female perineal rash289857000
- Rash of female perineum289857000
- Onychoatrophy due to lichen planus402351009
- Poikiloderma due to lichen planus402352002
- Lupus erythematosus overlap syndrome402711009
- Conjunctivitis due to lichen planus416706004
- Conjunctivitis associated with autoimmune skin disorder417492002
- Papular oral lichen planus707248001
- Vulvovaginal gingival syndrome707250009
- Lichen planus of gingiva718068005
- Lichen planus co-occurrent with onycholysis726476005
- Eruption of scalp827044000
- Rash of scalp827044000
- Eruption of skin of penis1264043002
- Penile skin rash1264043002
- Rash of skin of penis1264043002
UMLS
Clinical Terms
- Lichen planus of vulva
- Lichen planus of nail
- Eruption of female perineum
- Lichen planus of gingiva
- Postinflammatory hyperpigmentation
- Atrophia unguium
- Lichen planopilaris of scalp
- Ruber planus
- Conjunctivitis associated with autoimmune skin disorder
- Post-inflammatory hyperpigmentation
- Lichen planus of tongue
- Eruption of skin of penis
- Lichen planus of penis
- Lupus erythematosus overlap syndrome
- Oral lichen planus
- Eruption of vulva
- Lichen planus-lupus erythematosus overlap
- Lichen planus erythematosus
- Onychoatrophy
- Lichen planus with lupus erythematosus
- Atrophy of nail
- Guttate lichen planus
- Rash of vulva
- Lichen Rubra Planus
- Onycholysis
- Papular lichen planus
- Detachment of nail plate
- LP - Lichen planus
- Overlap syndrome
- Lichen planus linearis
- Post-inflammatory hyperpigmentation in lichen planus
- Genital lichen planus
- Pterygium of nail
- Lichen planus of palms and soles
- Linear lichen planus
- OLP - Oral lichen planus
- Rash of scalp
- Rash of female perineum
- Onychoatrophy due to lichen planus
- Vulval rash
- Lichen Ruber Planus
- Papular oral lichen planus
- Lichen planus of glans penis
- Post-inflammatory hypermelanosis
- Conjunctivitis due to lichen planus
- Nail pterygium in lichen planus
- Onychatrophia
- Lichen planus (disorder)
- Vulvovaginal gingival syndrome
- Separation of nail plate
- Female perineal rash
- Lichen planus of scalp
- Poikiloderma due to lichen planus
- Eruption of scalp
- Lichen planus co-occurrent with onycholysis
- Penile skin rash
- Rash of skin of penis
- Postinflammatory skin pigmentation change
- Site-specific lichen planus
- Lichen planus of lips
Frequently Asked Questions
What is the ICD-10 code for lichen planus, unspecified?
The ICD-10-CM code for lichen planus, unspecified is L43.9. The full clinical description is "Lichen planus, unspecified". L43.9 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code L43.9 mean?
ICD-10-CM code L43.9 represents “Lichen planus, unspecified”. It is classified under Chapter 12: Diseases of the Skin and Subcutaneous Tissue and is a billable/specific code that can be used on a claim.
Is L43.9 a billable code?
Yes, L43.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is L43.9 in?
L43.9 is in Chapter 12: Diseases of the Skin and Subcutaneous Tissue (codes L00-L99).
What codes cannot be used with L43.9?
L43.9 has Excludes1 notes indicating codes that cannot be used together with it, including: lichen planopilaris (L66.1-).
What SNOMED CT codes does L43.9 map to?
L43.9 maps to 36 SNOMED CT concepts: 276458009, 417492002, 416706004, 75789001, 289857000, and 31 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for L43.9?
L43.9 is linked to 1 UMLS Concept Unique Identifier: C0023646. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does L43.9 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like lichen planus, unspecified affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of L43.9?
L43.9 maps to the ICD-11 code: EA91.Z (Lichen planus of unspecified type).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.