MCMedicalCodingSoftware
T54.3X3A

T54.3X3A: Toxic effect of corrosive alkalis and alkali-like substances, assault, initial encounter

Billable / specific codeICD-10-CM

T54.3X3A is a billable, specific ICD-10-CM code for toxic effect of corrosive alkalis and alkali-like substances, assault, initial encounter. It is valid for submission on a claim.

Check T54.3X3A with the rest of the claim: free scrubber

7th character "A": initial encounter

The appropriate 7th character is to be added to each code from category T54

A
initial encounter
D
subsequent encounter
S
sequela

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

T54.3X3A is named in 5 Medicare coverage policies: 5 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A56389Billing and Coding: Upper Gastrointestinal Endoscopy and Visualization
  • A56612Billing and Coding: CT of the Head
  • A57063Billing and Coding: Diagnostic and Therapeutic Esophagogastroduodenoscopy
  • A57205Billing and Coding: Oximetry Services

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under T54.3X3

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.