1. ICD-10-CM Codes
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2. L00-L99 Diseases of the skin and subcutaneous tissue
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3. L49-L54 Urticaria and erythema
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4. L51- Erythema multiforme
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5. 2020 ICD-10-CM Diagnosis Code L51.1

2020 ICD-10-CM Diagnosis Code L51.1

Stevens-Johnson syndrome

2016 2017 2018 2019 2020 Billable/Specific Code

• L51.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2020 edition of ICD-10-CM L51.1 became effective on October 1, 2019.
• This is the American ICD-10-CM version of L51.1 - other international versions of ICD-10 L51.1 may differ.

• Stevens johnson syndrome

• A disorder characterized by less than 10% total body skin area separation of dermis. The syndrome is thought to be a hypersensitivity complex affecting the skin and the mucous membranes.
• A systemic, serious, and life-threatening disorder characterized by lesions in the skin and mucous membranes that may lead to necrosis. The lesions may appear anywhere in the body but they occur more commonly in the palms, soles, dorsum of the hands, and extensor surfaces. The lesions are vesicular or necrotic in the center, surrounded by an erythematous zone and occupy less than 10% of the body surfaces. The appearance of the mucocutaneous lesions is preceded by an upper respiratory tract infection. It is an immune complex hypersensitivity reaction usually caused by drugs (e.g., sulfa, phenytoin, penicillin), viruses (e.g., herpes simplex, influenza, hepatitis), and malignancies (e.g., carcinoma and lymphoma).
• A variant of bullous erythema multiforme. It ranges from mild skin and mucous membrane lesions to a severe, sometimes fatal systemic disorder. Ocular symptoms include ulcerative conjunctivitis, keratitis, iritis, uveitis, and sometimes blindness. The cause of the disease is unknown.

• 595 Major skin disorders with mcc
• 596 Major skin disorders without mcc

Convert L51.1 to ICD-9-CM

• 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
• 2017 (effective 10/1/2016): No change
• 2018 (effective 10/1/2017): No change
• 2019 (effective 10/1/2018): No change
• 2020 (effective 10/1/2019): No change

• Code First: L49
  ICD-10-CM Diagnosis Code L49

  Exfoliation due to erythematous conditions according to extent of body surface involved

  2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code

  Code First

  • erythematous condition causing exfoliation, such as:
  • Ritter's disease (L00)
  • (Staphylococcal) scalded skin syndrome (L00)
  • Stevens-Johnson syndrome (L51.1)
  • Stevens-Johnson syndrome-toxic epidermal necrolysis
  • overlap syndrome (L51.3)
  • Toxic epidermal necrolysis (L51.2)

• Ectodermosis erosiva pluriorificialis L51.1
• Erythema, erythematous (infectional) (inflammation) L53.9
  ICD-10-CM Diagnosis Code L53.9

  Erythematous condition, unspecified

  2016 2017 2018 2019 2020 Billable/Specific Code

  Applicable To

  • Erythema NOS
  • Erythroderma NOS
  • multiforme (major) (minor) L51.9
    ICD-10-CM Diagnosis Code L51.9

    Erythema multiforme, unspecified

    2016 2017 2018 2019 2020 Billable/Specific Code

    Applicable To

    • Erythema iris
    • Erythema multiforme major NOS
    • Erythema multiforme minor NOS
    • Herpes iris
    • bullous, bullosum L51.1
    • conjunctiva L51.1
• Stevens-Johnson disease or syndrome L51.1
• Syndrome - see also Disease
  • Stevens-Johnson syndrome L51.1

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.