2022 ICD-10-CM Code L51

Erythema multiforme

Version 2021

Not Valid for Submission

ICD-10:L51
Short Description:Erythema multiforme
Long Description:Erythema multiforme

Code Classification

  • Diseases of the skin and subcutaneous tissue (L00–L99)
    • Urticaria and erythema (L49-L54)
      • Erythema multiforme (L51)

L51 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of erythema multiforme. The code is not specific and is NOT valid for the year 2022 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding for Erythema multiforme

Non-specific codes like L51 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for erythema multiforme:

  • BILLABLE CODE - Use L51.0 for Nonbullous erythema multiforme
  • BILLABLE CODE - Use L51.1 for Stevens-Johnson syndrome
  • BILLABLE CODE - Use L51.2 for Toxic epidermal necrolysis [Lyell]
  • BILLABLE CODE - Use L51.3 for Stevens-Johnson syndrome-toxic epidermal necrolysis overlap syndrome
  • BILLABLE CODE - Use L51.8 for Other erythema multiforme
  • BILLABLE CODE - Use L51.9 for Erythema multiforme, unspecified

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code L51:


Use Additional Code

Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

Clinical Information

Information for Patients


Skin Conditions

Your skin is your body's largest organ. It covers and protects your body. Your skin

Anything that irritates, clogs, or inflames your skin can cause symptoms such as redness, swelling, burning, and itching. Allergies, irritants, your genetic makeup, and certain diseases and immune system problems can cause rashes, hives, and other skin conditions. Many skin problems, such as acne, also affect your appearance.

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases


[Learn More in MedlinePlus]

Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)