2021 ICD-10-CM Diagnosis Code L56.4

Polymorphous light eruption

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • L56.4 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM L56.4 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of L56.4 - other international versions of ICD-10 L56.4 may differ.
The following code(s) above L56.4 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 L56.4:
  • L00-L99
    2021 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
  • L56
    ICD-10-CM Diagnosis Code L56

    Other acute skin changes due to ultraviolet radiation

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Use Additional
    • code to identify the source of the ultraviolet radiation (W89, X32)
    Other acute skin changes due to ultraviolet radiation
Approximate Synonyms
  • Hydroa aestivale
  • Hydroa estivale
  • Polymorphic light eruption
ICD-10-CM L56.4 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 606 Minor skin disorders with mcc
  • 607 Minor skin disorders without mcc

Convert L56.4 to ICD-9-CM

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
  • 2021 (effective 10/1/2020): No change

Diagnosis Index entries containing back-references to L56.4:
  • Eruption
    • Hutchinson, summer L56.4
    • polymorphous light L56.4 (sun)
  • Hutchinson's
    • disease, meaning
      • prurigo estivalis L56.4
      • summer eruption or summer prurigo L56.4
  • Hydroa R23.8
    ICD-10-CM Diagnosis Code R23.8

    Other skin changes

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    • aestivale L56.4
    • vacciniforme L56.4
  • Prurigo (ferox) (gravis) (Hebrae) (Hebra's) (mitis) (simplex) L28.2
    ICD-10-CM Diagnosis Code L28.2

    Other prurigo

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Prurigo NOS
    • Prurigo Hebra
    • Prurigo mitis
    • Urticaria papulosa
    • estivalis L56.4

ICD-10-CM Codes Adjacent To L56.4
L55 Sunburn
L55.0 Sunburn of first degree
L55.1 Sunburn of second degree
L55.2 Sunburn of third degree
L55.9 Sunburn, unspecified
L56 Other acute skin changes due to ultraviolet radiation
L56.0 Drug phototoxic response
L56.1 Drug photoallergic response
L56.2 Photocontact dermatitis [berloque dermatitis]
L56.3 Solar urticaria
L56.4 Polymorphous light eruption
L56.5 Disseminated superficial actinic porokeratosis (DSAP)
L56.8 Other specified acute skin changes due to ultraviolet radiation
L56.9 Acute skin change due to ultraviolet radiation, unspecified
L57 Skin changes due to chronic exposure to nonionizing radiation
L57.0 Actinic keratosis
L57.1 Actinic reticuloid
L57.2 Cutis rhomboidalis nuchae
L57.3 Poikiloderma of Civatte
L57.4 Cutis laxa senilis
L57.5 Actinic granuloma

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