2021 ICD-10-CM Diagnosis Code T33.0

Superficial frostbite of head

    2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
  • T33.0 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2021 edition of ICD-10-CM T33.0 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of T33.0 - other international versions of ICD-10 T33.0 may differ.
The following code(s) above T33.0 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to T33.0:
  • S00-T88
    2021 ICD-10-CM Range S00-T88

    Injury, poisoning and certain other consequences of external causes

    • 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
    Type 1 Excludes
    Use Additional
    • code to identify any retained foreign body, if applicable (Z18.-)
    Injury, poisoning and certain other consequences of external causes
  • T33-T34
    2021 ICD-10-CM Range T33-T34


    Type 2 Excludes
    • hypothermia and other effects of reduced temperature (T68, T69.-)
  • T33
    ICD-10-CM Diagnosis Code T33

    Superficial frostbite

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    • frostbite with partial thickness skin loss
    Superficial frostbite
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
ICD-10-CM Codes Adjacent To T33.0
T32.91 …… with 10-19% third degree corrosion
T32.92 …… with 20-29% third degree corrosion
T32.93 …… with 30-39% third degree corrosion
T32.94 …… with 40-49% third degree corrosion
T32.95 …… with 50-59% third degree corrosion
T32.96 …… with 60-69% third degree corrosion
T32.97 …… with 70-79% third degree corrosion
T32.98 …… with 80-89% third degree corrosion
T32.99 …… with 90% or more third degree corrosion
T33 Superficial frostbite
T33.0 Superficial frostbite of head
T33.01 Superficial frostbite of ear
T33.011 Superficial frostbite of right ear
T33.011A …… initial encounter
T33.011D …… subsequent encounter
T33.011S …… sequela
T33.012 Superficial frostbite of left ear
T33.012A …… initial encounter
T33.012D …… subsequent encounter
T33.012S …… sequela
T33.019 Superficial frostbite of unspecified ear

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.