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ICD-10-CM 2027 diagnosis code

T23.012Burn of unspecified degree of left thumb (nail)

Not billable — use a more specific codeRequires 7th character

T23.012 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About T23.012

T23.012 is the ICD-10-CM diagnosis code for burn of unspecified degree of left thumb (nail). It belongs to category T23 (burn and corrosion of wrist and hand), block T20-T25 (burns and corrosions of external body surface, specified by site) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within T23.01 (burn of unspecified degree of thumb (nail)), T23.012 is specifically for burn of unspecified degree of left thumb (nail). Related codes cover right thumb (nail) (T23.011) and unspecified thumb (nail) (T23.019).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

7th character

The appropriate 7th character is to be added to each code from category T23

Notes that apply from higher levels

Instructions written at a parent level also apply to T23.012.

› From T23.0 Burn of unspecified degree of wrist and hand
Use additional code
  • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)

Broader instructions also apply from T20-T25 Burns and corrosions of external body surface, specified by site and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to T23.012.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about T23.012

Is T23.012 billable?

No. T23.012 is a header code. Report one of its more specific subcodes instead.