T34 ICD-10-CM Code: Frostbite with tissue necrosis
T34 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · free HCC coding tools
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FY 2026 Apr update / Injury, poisoning and certain other consequences of external causes (S00-T88) / Frostbite (T33-T34)
T34
Header CodeICD-10-CMOfficial ICD-10-CMCodebook guidanceFrostbite with tissue necrosis
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialNo inclusion terms are included in this display for T34. Check the code and parent instructions in the Code Book.
Excludes 2
Official- birth trauma (P10-P15)Inherited from S00-T88, T33-T34
- obstetric trauma (O70-O71)Inherited from S00-T88, T33-T34
- hypothermia and other effects of reduced temperature (T68, T69.-)Inherited from S00-T88, T33-T34
Related Codes
Includes
OfficialNo Includes notes are included in this display for T34. Check the code and parent instructions in the Code Book.
Excludes 1
OfficialNo Excludes 1 notes are included in this display for T34. Check the code and parent instructions in the Code Book.
Code First
OfficialNo Code First sequencing instructions are included in this display for T34. Check the code and parent instructions in the Code Book.
Use Additional
Official- code to identify any retained foreign body, if applicable (Z18.-)Inherited from S00-T88
Code Also
OfficialNo Code Also instructions are included in this display for T34. Check the code and parent instructions in the Code Book.
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
- Code
- T34
- Description
- Frostbite with tissue necrosis
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF reference coefficient
- —
- Billable
- No
- Payment year
- 2026
Coder workflow notes
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What This Code Means
T34 is the ICD-10-CM diagnosis code for frostbite with tissue necrosis. T34 sits in the ICD-10-CM chapter for injury, poisoning and certain other consequences of external causes (s00-t88), within the section covering frostbite (t33-t34).
Header codes like T34 cannot be reported on claims directly; they organize child codes that share clinical context. Coders should select the billable child code that matches the documented presentation and then verify its current source-backed HCC mapping. Do not infer a child code or risk adjustment value from the header alone.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for T34 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.