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T33Non-billableSave

T33 - Superficial frostbite

ICD-10-CM Chapter 19: Injury, poisoning and certain other consequences of external causes · T33-T34 Frostbite (T33-T34) · Top-level category · FY2027

Coding Guidance

T33 is a non-billable heading. Report one of the 10 more specific codes below.

7th Character

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

  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Includes, Excludes and Coding Notes

IncludesFrom T33

Conditions this code covers.

  • frostbite with partial thickness skin loss
Excludes 2 — Not Included HereFrom T33-T34 Frostbite (T33-T34)

Not part of this code; report both codes when the patient has both conditions.

  • hypothermia and other effects of reduced temperature (T68, T69.-)
Excludes 2 — Not Included HereFrom Chapter S00-T88

Not part of this code; report both codes when the patient has both conditions.

  • birth trauma (P10-P15)
  • obstetric trauma (O70-O71)
Use Additional CodeFrom Chapter S00-T88

Add a secondary code to identify the associated condition or cause when it is documented.

  • code to identify any retained foreign body, if applicable (Z18.-)
NotesFrom Chapter S00-T88

Instructional notes from the ICD-10-CM tabular list.

  • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
  • The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

More Specific Codes (10)

T33.0Superficial frostbite of head→T33.1Superficial frostbite of neck→T33.2Superficial frostbite of thorax→T33.3Superficial frostbite of abdominal wall, lower back and pelvis→T33.4Superficial frostbite of arm→T33.5Superficial frostbite of wrist, hand, and fingers→T33.6Superficial frostbite of hip and thigh→T33.7Superficial frostbite of knee and lower leg→T33.8Superficial frostbite of ankle, foot, and toe(s)→T33.9Superficial frostbite of other and unspecified sites→