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T53.6X4A

T53.6X4A: Toxic effect of other halogen derivatives of aliphatic hydrocarbons, undetermined, initial encounter

Billable / specific codeICD-10-CM

T53.6X4A is a billable, specific ICD-10-CM code for toxic effect of other halogen derivatives of aliphatic hydrocarbons, undetermined, initial encounter. It is valid for submission on a claim.

Check T53.6X4A 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 T53

A
initial encounter
D
subsequent encounter
S
sequela

Other codes that can never be billed with T53.6X4A

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • T60.1Toxic effect of halogenated insecticides
  • T52Toxic effect of organic solvents

Risk adjustment

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

Medicare coverage

T53.6X4A is named in 2 Medicare coverage policies: 2 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A56612Billing and Coding: CT of the Head
  • A57205Billing and Coding: Oximetry Services

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under T53.6X4

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.