T33.81 – Superficial frostbite of ankle
ICD-10-CM 2027 diagnosis code · Frostbite
- Code
T33.81(claims format:T3381)- Description
- Superficial frostbite of ankle
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 19. Injury, poisoning and certain other consequences of external causes (S00-T88)
- Block
- T33-T34 Frostbite
- Parent codes
- T33 › T33.8
Billable codes under T33.81
T33.81 is a header code and cannot be used on claims. Choose the most specific code:
- T33.811 – Superficial frostbite of right ankleHeader (more codes below)
- T33.812 – Superficial frostbite of left ankleHeader (more codes below)
- T33.819 – Superficial frostbite of unspecified ankleHeader (more codes below)
7th character values
Codes in this category need a 7th character to describe the encounter or episode of care (use placeholder X for empty positions).
| Character | Meaning |
|---|---|
A | initial encounter |
D | subsequent encounter |
S | sequela |
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
T33 – Superficial frostbite
- frostbite with partial thickness skin loss
- The appropriate 7th character is to be added to each code from category T33
Block T33-T34
Index terms for T33.81
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in T33.8
Frequently asked questions
What is ICD-10 code T33.81?
T33.81 is the ICD-10-CM code for superficial frostbite of ankle, in the block T33-T34 (Frostbite).
Is T33.81 a billable code?
No. T33.81 is a header code with more specific child codes; report one of the billable codes listed above.
What category does T33.81 belong to?
It belongs to category T33 – Superficial frostbite.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.