2020 ICD-10-CM Diagnosis Code L56.1

Drug photoallergic response

    2016 2017 2018 2019 2020 Billable/Specific Code
  • L56.1 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 L56.1 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of L56.1 - other international versions of ICD-10 L56.1 may differ.
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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)
The following code(s) above L56.1 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 L56.1:
  • 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
  • L56
    ICD-10-CM Diagnosis Code L56

    Other acute skin changes due to ultraviolet radiation

      2016 2017 2018 2019 2020 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
  • Photoallergic drug eruption
ICD-10-CM L56.1 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 606 Minor skin disorders with mcc
  • 607 Minor skin disorders without mcc

Convert L56.1 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
Code annotations containing back-references to L56.1:
  • Type 2 Excludes: L27
    ICD-10-CM Diagnosis Code L27

    Dermatitis due to substances taken internally

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Type 2 Excludes
    • adverse food reaction, except dermatitis (T78.0-T78.1)
    • contact dermatitis (L23-L25)
    • drug photoallergic response (L56.1)
    • drug phototoxic response (L56.0)
    • urticaria (L50.-)

Diagnosis Index entries containing back-references to L56.1:
  • Reaction - see also Disorder
    • drug NEC T88.7
      ICD-10-CM Diagnosis Code T88.7

      Unspecified adverse effect of drug or medicament

        2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
      Applicable To
      • Drug hypersensitivity NOS
      • Drug reaction NOS
      Type 1 Excludes
      Use Additional
      • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
      • photoallergic L56.1
  • Response (drug)
    • photoallergic L56.1

ICD-10-CM Codes Adjacent To L56.1
L53.8 Other specified erythematous conditions
L53.9 Erythematous condition, unspecified
L54 Erythema in diseases classified elsewhere
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

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