T20 ICD-10-CM Code: Burn and corrosion of head, face, and neck
T20 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC Buddy coding tools
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FY 2026 Apr update / Injury, poisoning and certain other consequences of external causes (S00-T88) / Burns and corrosions of external body surface, specified by site (T20-T25)
T20
Header CodeICD-10-CMOfficial ICD-10-CMCodebook guidanceBurn and corrosion of head, face, and neck
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 T20. Check the code and parent instructions in the Code Book.
Excludes 2
Official- burn and corrosion of ear drum (T28.41, T28.91)
- burn and corrosion of eye and adnexa (T26.-)
- burn and corrosion of mouth and pharynx (T28.0)
- birth trauma (P10-P15)Inherited from S00-T88
- obstetric trauma (O70-O71)Inherited from S00-T88
Related Codes
Includes
Official- burns and corrosions of first degree [erythema]Inherited from T20-T25
- burns and corrosions of second degree [blisters][epidermal loss]Inherited from T20-T25
- burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]Inherited from T20-T25
Excludes 1
OfficialNo Excludes 1 notes are included in this display for T20. Check the code and parent instructions in the Code Book.
Code First
OfficialNo Code First sequencing instructions are included in this display for T20. 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, T20-T25
- code from category T31 or T32 to identify extent of body surface involvedInherited from S00-T88, T20-T25
Code Also
OfficialNo Code Also instructions are included in this display for T20. 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
- T20
- Description
- Burn and corrosion of head, face, and neck
- 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
T20 is the ICD-10-CM diagnosis code for burn and corrosion of head, face, and neck. T20 sits in the ICD-10-CM chapter for injury, poisoning and certain other consequences of external causes (s00-t88), within the section covering burns and corrosions of external body surface, specified by site (t20-t25).
Header codes like T20 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 T20 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.