2020 ICD-10-CM Diagnosis Code L51

Erythema multiforme

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • L51 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2020 edition of ICD-10-CM L51 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of L51 - other international versions of ICD-10 L51 may differ.
Use Additional
Use Additional Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • code for adverse effect, if applicable, to identify drug (T36-T50
    ICD-10-CM Range T36-T50

    Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances

    Code First
    • , for adverse effects, the nature of the adverse effect, such as:
    • adverse effect NOS (T88.7)
    • aspirin gastritis (K29.-)
    • blood disorders (D56-D76)
    • contact dermatitis (L23-L25)
    • dermatitis due to substances taken internally (L27.-)
    • nephropathy (N14.0-N14.2)
    Includes
    • adverse effect of correct substance properly administered
    • poisoning by overdose of substance
    • poisoning by wrong substance given or taken in error
    • underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed
    Note
    • The drug giving rise to the adverse effect should be identified by use of codes from categories T36-T50 with fifth or sixth character 5.
    Type 1 Excludes
    • toxic reaction to local anesthesia in pregnancy (O29.3-)
    Type 2 Excludes
    • abuse and dependence of psychoactive substances (F10-F19)
    • abuse of non-dependence-producing substances (F55.-)
    • drug reaction and poisoning affecting newborn (P00-P96)
    • pathological drug intoxication (inebriation) (F10-F19)
    Use Additional
    • code(s) to specify:
    • manifestations of poisoning
    • underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)
    • underdosing of medication regimen (Z91.12-, Z91.13-)
    • T36 Poisoning by, adverse effect of and unde...
    • T37 Poisoning by, adverse effect of and unde...
    • T38 Poisoning by, adverse effect of and unde...
    • T39 Poisoning by, adverse effect of and unde...
    • T40 Poisoning by, adverse effect of and unde...
    • T41 Poisoning by, adverse effect of and unde...
    • T42 Poisoning by, adverse effect of and unde...
    • T43 Poisoning by, adverse effect of and unde...
    • T44 Poisoning by, adverse effect of and unde...
    • T45 Poisoning by, adverse effect of and unde...
    • T46 Poisoning by, adverse effect of and unde...
    • T47 Poisoning by, adverse effect of and unde...
    • T48 Poisoning by, adverse effect of and unde...
    • T49 Poisoning by, adverse effect of and unde...
    • T50 Poisoning by, adverse effect of and unde...
    with fifth or sixth character 5)
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as L51. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • staphylococcal scalded skin syndrome (
    ICD-10-CM Diagnosis Code L00

    Staphylococcal scalded skin syndrome

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Ritter's disease
    Type 1 Excludes
    • bullous impetigo (L01.03)
    • pemphigus neonatorum (L01.03)
    • toxic epidermal necrolysis [Lyell] (L51.2)
    Use Additional
    • code to identify percentage of skin exfoliation (L49.-)
    L00
    )
  • Ritter's disease (
    ICD-10-CM Diagnosis Code L00

    Staphylococcal scalded skin syndrome

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Ritter's disease
    Type 1 Excludes
    • bullous impetigo (L01.03)
    • pemphigus neonatorum (L01.03)
    • toxic epidermal necrolysis [Lyell] (L51.2)
    Use Additional
    • code to identify percentage of skin exfoliation (L49.-)
    L00
    )
The following code(s) above L51 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to L51:
  • L00-L99
    2020 ICD-10-CM Range L00-L99

    Diseases of the skin and subcutaneous tissue

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • lipomelanotic reticulosis (I89.8)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    • systemic connective tissue disorders (M30-M36)
    • viral warts (B07.-)
    Diseases of the skin and subcutaneous tissue
  • L49-L54
    2020 ICD-10-CM Range L49-L54

    Urticaria and erythema

    Type 1 Excludes
    Urticaria and erythema
Clinical Information
  • A disorder characterized by target lesions (a pink-red ring around a pale center).
  • A hypersensitivity reaction characterized by the sudden appearance of symmetrical cutaneous and mucocutaneous macular or popular lesions which evolve into lesions with bright red borders (target lesions). The lesions usually appear in the hands, feet, extremities, and face. Symptoms include fever, malaise, sore throat, cough, vomiting, diarrhea, arthalgia, and myalgia. Causes include infections (most commonly herpes simplex virus), drugs (e.g., sulfonamides, anticonvulsants, and antibiotics), malignancies, and collagen vascular disorders.
  • A skin and mucous membrane disease characterized by an eruption of macules, papules, nodules, vesicles, and/or bullae with characteristic "bull's-eye" lesions usually occurring on the dorsal aspect of the hands and forearms.
  • Skin and mucous membrane disease characterized by an eruption of macules, papules, nodules, vesicles, and/or bullae with characteristic bull's-eye lesions usually occurring on the dorsal aspect of the hands and forearms.
Code History
  • 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 annotations containing back-references to L51:
  • Code First: M14.8
    ICD-10-CM Diagnosis Code M14.8

    Arthropathies in other specified diseases classified elsewhere

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Code First
    • underlying disease, such as:
    • amyloidosis (E85.-)
    • erythema multiforme (L51.-)
    • erythema nodosum (L52)
    • hemochromatosis (E83.11-)
    • hyperparathyroidism (E21.-)
    • hypothyroidism (E00-E03)
    • sickle-cell disorders (D57.-)
    • thyrotoxicosis [hyperthyroidism] (E05.-)
    • Whipple's disease (K90.81)
ICD-10-CM Codes Adjacent To L51
L50 Urticaria
L50.0 Allergic urticaria
L50.1 Idiopathic urticaria
L50.2 Urticaria due to cold and heat
L50.3 Dermatographic urticaria
L50.4 Vibratory urticaria
L50.5 Cholinergic urticaria
L50.6 Contact urticaria
L50.8 Other urticaria
L50.9 Urticaria, unspecified
L51 Erythema multiforme
L51.0 Nonbullous erythema multiforme
L51.1 Stevens-Johnson syndrome
L51.2 Toxic epidermal necrolysis [Lyell]
L51.3 Stevens-Johnson syndrome-toxic epidermal necrolysis overlap syndrome
L51.8 Other erythema multiforme
L51.9 Erythema multiforme, unspecified
L52 Erythema nodosum
L53 Other erythematous conditions
L53.0 Toxic erythema
L53.1 Erythema annulare centrifugum

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