ICDcodes.org
FY2027

T23.21 — Burn of second degree of thumb (nail)

Not billable

Is T23.21 billable?

No — T23.21 is a non-billable header code. T23.21 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 9 billable codes beneath T23.21.

T23.21 at a glance

CodeT23.21
DescriptionBurn of second degree of thumb (nail)
BillableNo — header code
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

Use additional code — inherited from Chapter 19

Report an additional code alongside T23.21 to fully describe the condition. T23.21 is sequenced first.

  • code to identify any retained foreign body, if applicable (Z18.-)

Use additional code — inherited from T20-T25

Report an additional code alongside T23.21 to fully describe the condition. T23.21 is sequenced first.

  • code from category T31 or T32 to identify extent of body surface involved

Use additional code — inherited from T23.2

Report an additional code alongside T23.21 to fully describe the condition. T23.21 is sequenced first.

  • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)

Excludes2 — not included here — inherited from Chapter 19

The conditions below are not part of T23.21, but a patient may have both at the same time. When documentation supports it, T23.21 and the excluded code may both be reported.

  • birth trauma (P10-P15)
  • obstetric trauma (O70-O71)

What codes fall under T23.21? (3)

How long has T23.21 existed?

T23.21 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

What other codes are in the T23.2 family? (8)