T33

Header — not billable

Superficial frostbite

The ICD-10 code for superficial frostbite is T33.

T33 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 10 more specific codes below.

Clinical notes

Includes

Terms listed here further define or give examples of the conditions grouped under this code — they describe what the code covers, not a separate diagnosis.

frostbite with partial thickness skin loss

7th character definitions

These definitions specify what each valid 7th-character value means for codes in this category.

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7th character note

This category requires a 7th character to indicate additional clinical detail (e.g. encounter type: initial, subsequent, sequela). The code is incomplete without it.

The appropriate 7th character is to be added to each code from category T33

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

•This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
•This category requires a 7th character. Documentation should clearly indicate the episode of care (initial encounter, subsequent encounter, or sequela).
•As a general rule, code to the highest level of specificity supported by the documentation in the medical record.

Child codes under T33

Related codes in this category

T34Frostbite with tissue necrosisnon-billable header
T33Superficial frostbitenon-billable header