2021 ICD-10-CM Diagnosis Code T25.491D

Corrosion of unspecified degree of multiple sites of right ankle and foot, subsequent encounter

    2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
  • T25.491D is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Corrosion of unsp deg mult sites of right ank/ft, subs
  • The 2021 edition of ICD-10-CM T25.491D became effective on October 1, 2020.
  • This is the American ICD-10-CM version of T25.491D - other international versions of ICD-10 T25.491D may differ.
The following code(s) above T25.491D 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 T25.491D:
  • 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
  • T25.4
    ICD-10-CM Diagnosis Code T25.4

    Corrosion of unspecified degree of 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 ankle and foot
Present On Admission
POA Help
"Present On Admission" is defined as present at the time the order for inpatient admission occurs — conditions that develop during an outpatient encounter, including emergency department, observation, or outpatient surgery, are considered POA.
  • T25.491D is considered exempt from POA reporting.
ICD-10-CM T25.491D is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 949 Aftercare with cc/mcc
  • 950 Aftercare without cc/mcc

Convert T25.491D 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
ICD-10-CM Codes Adjacent To T25.491D
T25.432A …… initial encounter
T25.432D …… subsequent encounter
T25.432S …… sequela
T25.439 Corrosion of unspecified degree of unspecified toe(s) (nail)
T25.439A …… initial encounter
T25.439D …… subsequent encounter
T25.439S …… sequela
T25.49 Corrosion of unspecified degree of multiple sites of ankle and foot
T25.491 Corrosion of unspecified degree of multiple sites of right ankle and foot
T25.491A …… initial encounter
T25.491D …… subsequent encounter
T25.491S …… sequela
T25.492 Corrosion of unspecified degree of multiple sites of left ankle and foot
T25.492A …… initial encounter
T25.492D …… subsequent encounter
T25.492S …… sequela
T25.499 Corrosion of unspecified degree of multiple sites of unspecified ankle and foot
T25.499A …… initial encounter
T25.499D …… subsequent encounter
T25.499S …… sequela
T25.5 Corrosion of first degree of ankle and foot

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