T33.4
ICD-10Non-billable categorySuperficial frostbite of arm
Official ICD-10-CM descriptor (FY2026)
Superficial frostbite of arm
T33.4 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- superficial frostbite of wrist and hand (T33.5-)
ICD-10-CM FY2026 defines 3 codes beneath T33.4. See the ICD-10-CM index for what this site publishes.
Related codes in T33
- T33.0Superficial frostbite of headcategory
- T33.1Superficial frostbite of neckcategory
- T33.2Superficial frostbite of thoraxcategory
- T33.3Superficial frostbite of abd wall, lower back and pelviscategory
- T33.5Superficial frostbite of wrist, hand, and fingerscategory
- T33.6Superficial frostbite of hip and thighcategory
- T33.7Superficial frostbite of knee and lower legcategory
- T33.8Superficial frostbite of ankle, foot, and toe(s)category
- T33.9Superficial frostbite of other and unspecified sitescategory
Where this code sits
- Block
- Frostbite (T33-T34)
- Parent code
- T33
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.