T33.4 — Superficial frostbite of arm
Is T33.4 billable?
No — T33.4 is a non-billable header code. T33.4 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 T33.4.
Billable codes under this header
- T33.40XASuperficial frostbite of unspecified arm, initial encounter
- T33.40XDSuperficial frostbite of unspecified arm, subsequent encounter
- T33.40XSSuperficial frostbite of unspecified arm, sequela
- T33.41XASuperficial frostbite of right arm, initial encounter
- T33.41XDSuperficial frostbite of right arm, subsequent encounter
- T33.41XSSuperficial frostbite of right arm, sequela
- T33.42XASuperficial frostbite of left arm, initial encounter
- T33.42XDSuperficial frostbite of left arm, subsequent encounter
- T33.42XSSuperficial frostbite of left arm, sequela
T33.4 at a glance
| Code | T33.4 |
|---|---|
| Description | Superficial frostbite of arm |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is T33.4 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to T33.4. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Frostbite › arm (superficial)
Excludes2 — not included here
The conditions below are not part of T33.4, but a patient may have both at the same time. When documentation supports it, T33.4 and the excluded code may both be reported.
- superficial frostbite of wrist and hand (T33.5-)
Use additional code — inherited from Chapter 19
Report an additional code alongside T33.4 to fully describe the condition. T33.4 is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T33.4, but a patient may have both at the same time. When documentation supports it, T33.4 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T33-T34
The conditions below are not part of T33.4, but a patient may have both at the same time. When documentation supports it, T33.4 and the excluded code may both be reported.
What codes fall under T33.4? (3)
How long has T33.4 existed?
T33.4 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.
Which conditions are coded to T33.4?
What other codes are in the T33 family? (9)
- T33.0Superficial frostbite of headnot billable
- T33.1Superficial frostbite of necknot billable
- T33.2Superficial frostbite of thoraxnot billable
- T33.3Superficial frostbite of abdominal wall, lower back and pelvisnot billable
- T33.5Superficial frostbite of wrist, hand, and fingersnot billable
- T33.6Superficial frostbite of hip and thighnot billable
- T33.7Superficial frostbite of knee and lower legnot billable
- T33.8Superficial frostbite of ankle, foot, and toe(s)not billable
- T33.9Superficial frostbite of other and unspecified sitesnot billable