2021 ICD-10-CM Diagnosis Code T24.431

Corrosion of unspecified degree of right lower leg

    2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
  • T24.431 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2021 edition of ICD-10-CM T24.431 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of T24.431 - other international versions of ICD-10 T24.431 may differ.
The following code(s) above T24.431 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 T24.431:
  • S00-T88
    2021 ICD-10-CM Range S00-T88

    Injury, poisoning and certain other consequences of external causes

    Note
    • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
    Type 1 Excludes
    Use Additional
    • code to identify any retained foreign body, if applicable (Z18.-)
    Injury, poisoning and certain other consequences of external causes
  • T20-T25
    2021 ICD-10-CM Range T20-T25

    Burns and corrosions of external body surface, specified by site

    Includes
    • burns and corrosions of first degree [erythema]
    • burns and corrosions of second degree [blisters][epidermal loss]
    • burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]
    Use Additional
    • code from category T31 or T32 to identify extent of body surface involved
    Burns and corrosions of external body surface, specified by site
  • T24
    ICD-10-CM Diagnosis Code T24

    Burn and corrosion of lower limb, except ankle and foot

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • burn and corrosion of ankle and foot (T25.-)
    • burn and corrosion of hip region (T21.-)
    Burn and corrosion of lower limb, except ankle and foot
  • T24.4
    ICD-10-CM Diagnosis Code T24.4

    Corrosion of unspecified degree of lower limb, except ankle and foot

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Code First
    • (T51-T65) to identify chemical and intent
    Use Additional
    • external cause code to identify place (Y92)
    Corrosion of unspecified degree of lower limb, except ankle and foot
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 T24.431:
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) T30.4
    ICD-10-CM Diagnosis Code T30.4

    Corrosion of unspecified body region, unspecified degree

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • This code is not for inpatient use. Code to specified site and degree of corrosion
    • Corrosion NOS
    • Multiple corrosion NOS
    • calf T24.439
      ICD-10-CM Diagnosis Code T24.439

      Corrosion of unspecified degree of unspecified lower leg

        2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code

ICD-10-CM Codes Adjacent To T24.431
T24.421S …… sequela
T24.422 Corrosion of unspecified degree of left knee
T24.422A …… initial encounter
T24.422D …… subsequent encounter
T24.422S …… sequela
T24.429 Corrosion of unspecified degree of unspecified knee
T24.429A …… initial encounter
T24.429D …… subsequent encounter
T24.429S …… sequela
T24.43 Corrosion of unspecified degree of lower leg
T24.431 Corrosion of unspecified degree of right lower leg
T24.431A …… initial encounter
T24.431D …… subsequent encounter
T24.431S …… sequela
T24.432 Corrosion of unspecified degree of left lower leg
T24.432A …… initial encounter
T24.432D …… subsequent encounter
T24.432S …… sequela
T24.439 Corrosion of unspecified degree of unspecified lower leg
T24.439A …… initial encounter
T24.439D …… subsequent encounter

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