T33.81
⚠ Non-billable
Superficial frostbite of ankle
ICD-10-CM · FY2026 · Injury, Poisoning and Certain Other Consequences of External Causes
Code
T33.81
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Injury, Poisoning and Certain Other Consequences of External Causes
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code T33.81?
ICD-10-CM code T33.81 represents Superficial frostbite of ankle. It is a non-billable header code requiring a more specific subcategory in the Injury, Poisoning and Certain Other Consequences of External Causes chapter, effective October 1, 2025 – September 30, 2026.
Is T33.81 billable?
No. T33.81 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is T33.81 in?
T33.81 belongs to the Injury, Poisoning and Certain Other Consequences of External Causes chapter (S00–T88) of ICD-10-CM.
Related codes in the T33 category
T33
Superficial frostbite
Non-billable
T33.0
Superficial frostbite of head
Non-billable
T33.1
Superficial frostbite of neck
Non-billable
T33.2
Superficial frostbite of thorax
Non-billable
T33.3
Superficial frostbite of abdominal wall, lower back and pelvis
Non-billable
T33.4
Superficial frostbite of arm
Non-billable
T33.5
Superficial frostbite of wrist, hand, and fingers
Non-billable
T33.6
Superficial frostbite of hip and thigh
Non-billable
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