T33.521Header code — not billable
Superficial frostbite of right hand
- Chapter
- 19. Injury, poisoning and certain other consequences of external causes
- Category
- T33
- Effective date
- October 1, 2026
Related codes in category T33
T33Superficial frostbiteT33.0Superficial frostbite of headT33.01Superficial frostbite of earT33.011Superficial frostbite of right earT33.011ASuperficial frostbite of right ear, initial encounterYesT33.011DSuperficial frostbite of right ear, subsequent encounterYesT33.011SSuperficial frostbite of right ear, sequelaYesT33.012Superficial frostbite of left earT33.012ASuperficial frostbite of left ear, initial encounterYesT33.012DSuperficial frostbite of left ear, subsequent encounterYesT33.012SSuperficial frostbite of left ear, sequelaYesT33.019Superficial frostbite of unspecified ear
Frequently asked questions
What is ICD-10 code T33.521?
T33.521 is an ICD-10-CM diagnosis code for Superficial frostbite of right hand.
Is T33.521 a billable code?
No. T33.521 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is T33.521 in?
T33.521 falls under Chapter 19: Injury, poisoning and certain other consequences of external causes.
When did T33.521 become effective?
T33.521 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to T33.521?
T33.521 belongs to category T33, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.