L51.9
BillableErythema multiforme, unspecified
Erythema multiforme, unspecified
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Erythema iris
- Erythema multiforme major NOS
- Erythema multiforme minor NOS
- Herpes iris
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
Use Additional Code
Additional codes that should follow this code
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(99)
SNOMED CT
- Erythema multiforme, dermal type22972008
- Herpes iris28664002
- EM - Erythema multiforme36715001
- Erythema multiforme36715001
- Target lesion36715001
- Coccidioidomycosis with erythema multiforme41030002
- Lip ulcer64143008
- Erythema of mucous membrane126486000
- Mucous membrane erythema126486000
- Erythema multiforme of pregnancy238820002
- Pregnancy dermatosis239101008
- Pregnancy eruption239101008
- Drug-induced erythema multiforme297942002
- Erythema multiforme due to malignancy403213004
- Erythema multiforme-induced ulceration of lips403441003
- Erythema multiforme co-occurrent with ulcer of oral mucous membrane707314000
- Erythema multiforme with oral ulceration707314000
- Gingival disease due to erythema multiforme713229006
- Erythema multiforme caused by virus762375006
- Erythema multiforme due to viral disease762375006
- Erythema multiforme provoked by viral infection762375006
- Erythema multiforme due to systemic fungal infection860800001
- Erythema multiforme due to Herpes simplex infection860869003
- Erythema multiforme provoked by Herpes simplex860869003
- Erythema multiforme due to Mycoplasma pneumoniae infection860870002
- Erythema multiforme provoked by Mycoplasma pneumoniae860870002
- Erythema multiforme due to bacterial infection1163528001
- Erythema multiforme provoked by bacterial infection1163528001
- EMPACT (erythema multiforme associated with phenytoin and cranial radiation therapy) syndrome1285410009
- Erythema multiforme associated with phenytoin and cranial radiation therapy1285410009
- Erythema multiforme major16898231000119107
- Erythema multiforme minor123571000119104
UMLS
- EM - Erythema multiformeC0014742
- Erythaema polymorpheC0014742
- Erythema MultiformeC0014742
- Erythema multiformeC0014742
- Erythema multiforme (disorder)C0014742
- Erythema multiforme, unspecifiedC0014742
- Erythema polymorpheC0014742
- Oral erythema multiformeC0014742
- Target lesionC0014742
- erythema multiformeC0014742
- erythema multiformesC0014742
- erythema polymorpheC0014742
- multiforme erythemaC0014742
- Erythema Multiforme MajorC3241919
- Erythema multiforme majorC3241919
- Erythema multiforme major (disorder)C3241919
- Erythema multiforme major NOSC3241919
- Erythema Multiforme MinorC0857751
- Erythema multiforme minorC0857751
- Erythema multiforme minor (disorder)C0857751
- Erythema multiforme minor NOSC0857751
- Erythema irisC0263322
- Herpes irisC0263323
- Herpes iris (disorder)C0263323
Clinical Terms
- Erythema multiforme co-occurrent with ulcer of oral mucous membrane
- Erythema multiforme due to systemic fungal infection
- Erythema multiforme with oral ulceration
- Erythema multiforme major (disorder)
- Oral erythema multiforme
- Erythema multiforme, dermal type
- Erythema iris
- Erythema multiforme associated with phenytoin and cranial radiation therapy
- Erythema multiforme due to bacterial infection
- Drug-induced erythema multiforme
- Coccidioidomycosis with erythema multiforme
- Erythema multiforme caused by virus
- Erythema multiforme of pregnancy
- Erythema multiforme major NOS
- Erythema multiforme due to viral disease
- Target lesion
- EMPACT (erythema multiforme associated with phenytoin and cranial radiation therapy) syndrome
- Gingival disease due to erythema multiforme
- Erythema Multiforme Minor
- Erythema multiforme provoked by bacterial infection
- Pregnancy dermatosis
- Erythema multiforme minor NOS
- Herpes iris (disorder)
- Erythema multiforme due to malignancy
- Erythema multiforme due to Mycoplasma pneumoniae infection
- Erythema multiforme provoked by viral infection
- Herpes iris
- Erythema multiforme provoked by Mycoplasma pneumoniae
- Erythema multiforme major
- Erythema of mucous membrane
- Pregnancy eruption
- Erythema multiforme minor (disorder)
- erythema polymorphe
- Erythema multiforme provoked by Herpes simplex
- Erythema multiforme due to Herpes simplex infection
- Erythema multiforme-induced ulceration of lips
- erythema multiformes
- multiforme erythema
- Erythema multiforme (disorder)
- Mucous membrane erythema
- Erythaema polymorphe
- EM - Erythema multiforme
- Lip ulcer
Frequently Asked Questions
What is the ICD-10 code for erythema multiforme, unspecified?
The ICD-10-CM code for erythema multiforme, unspecified is L51.9. The full clinical description is "Erythema multiforme, unspecified". L51.9 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code L51.9 mean?
ICD-10-CM code L51.9 represents “Erythema multiforme, 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 L51.9 a billable code?
Yes, L51.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is L51.9 in?
L51.9 is in Chapter 12: Diseases of the Skin and Subcutaneous Tissue (codes L00-L99).
What codes cannot be used with L51.9?
L51.9 has Excludes1 notes indicating codes that cannot be used together with it, including: Lyme disease (A69.2-); rosacea (L71.-); staphylococcal scalded skin syndrome (L00); and 1 more.
Are additional codes required with L51.9?
Yes, when using L51.9, also report: adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5).
What SNOMED CT codes does L51.9 map to?
L51.9 maps to 21 SNOMED CT concepts: 41030002, 297942002, 36715001, 1285410009, 762375006, and 16 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for L51.9?
L51.9 is linked to 5 UMLS Concept Unique Identifiers: C0014742, C3241919, C0857751, C0263322, C0263323. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does L51.9 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like erythema multiforme, 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 L51.9?
L51.9 maps to the ICD-11 code: EB12.Z (Erythema multiforme, unspecified).
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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.