2020 ICD-10-CM Diagnosis Code T23.449D

Corrosion of unspecified degree of unspecified multiple fingers (nail), including thumb, subsequent encounter

    2016 2017 2018 2019 2020 Billable/Specific Code POA Exempt
  • T23.449D is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Corros unsp degree of unsp mult fngr (nail), inc thumb, subs
  • The 2020 edition of ICD-10-CM T23.449D became effective on October 1, 2019.
  • This is the American ICD-10-CM version of T23.449D - other international versions of ICD-10 T23.449D may differ.
The following code(s) above T23.449D 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 T23.449D:
  • S00-T88
    2020 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
    2020 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
  • T23.4
    ICD-10-CM Diagnosis Code T23.4

    Corrosion of unspecified degree of wrist and hand

      2016 2017 2018 2019 2020 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 wrist and hand
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.
  • T23.449D is considered exempt from POA reporting.
ICD-10-CM T23.449D is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 949 Aftercare with cc/mcc
  • 950 Aftercare without cc/mcc

Convert T23.449D 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
ICD-10-CM Codes Adjacent To T23.449D
T23.441 Corrosion of unspecified degree of multiple right fingers (nail), including thumb
T23.441A …… initial encounter
T23.441D …… subsequent encounter
T23.441S …… sequela
T23.442 Corrosion of unspecified degree of multiple left fingers (nail), including thumb
T23.442A …… initial encounter
T23.442D …… subsequent encounter
T23.442S …… sequela
T23.449 Corrosion of unspecified degree of unspecified multiple fingers (nail), including thumb
T23.449A …… initial encounter
T23.449D …… subsequent encounter
T23.449S …… sequela
T23.45 Corrosion of unspecified degree of palm
T23.451 Corrosion of unspecified degree of right palm
T23.451A …… initial encounter
T23.451D …… subsequent encounter
T23.451S …… sequela
T23.452 Corrosion of unspecified degree of left palm
T23.452A …… initial encounter
T23.452D …… subsequent encounter
T23.452S …… sequela

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