T21.43XS
✓ Billable
Corrosion of unspecified degree of upper back, sequela
ICD-10-CM · FY2026 · Injury, Poisoning and Certain Other Consequences of External Causes
Code
T21.43XS
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Injury, Poisoning and Certain Other Consequences of External Causes
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code T21.43XS?
ICD-10-CM code T21.43XS represents Corrosion of unspecified degree of upper back, sequela. It is a billable diagnosis code in the Injury, Poisoning and Certain Other Consequences of External Causes chapter, effective October 1, 2025 – September 30, 2026.
Is T21.43XS billable?
Yes. T21.43XS is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is T21.43XS in?
T21.43XS belongs to the Injury, Poisoning and Certain Other Consequences of External Causes chapter (S00–T88) of ICD-10-CM.
Related codes in the T21 category
T21
Burn and corrosion of trunk
Non-billable
T21.0
Burn of unspecified degree of trunk
Non-billable
T21.1
Burn of first degree of trunk
Non-billable
T21.2
Burn of second degree of trunk
Non-billable
T21.3
Burn of third degree of trunk
Non-billable
T21.4
Corrosion of unspecified degree of trunk
Non-billable
T21.5
Corrosion of first degree of trunk
Non-billable
T21.6
Corrosion of second degree of trunk
Non-billable
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