Is T52.4X3D a billable ICD-10-CM code?

Yes. T52.4X3D is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does T52.4X3D sit in the tabular list?

Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Toxic effects of substances chiefly nonmedicinal as to source (T51-T65).

What cannot be coded together with T52.4X3D?

T52.4X3D carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above T52.4X3D (T52) and apply to it just the same.

T52.4X3D

T52.4X3D — Toxic effect of ketones, assault, subsequent encounter

Billable / specific codeICD-10-CMPOA exempt

T52.4X3D is a billable, specific ICD-10-CM code for toxic effect of ketones, assault, subsequent encounter. It is valid for submission on a claim.

7th character "D" — subsequent encounter

The appropriate 7th character is to be added to each code from category T52

A: initial encounter
D: subsequent encounter
S: sequela

Excludes1 inherited from the categories above T52.4X3D

These are not written on T52.4X3D, but they bind it: a note on a category applies to every code beneath it. Billing T52.4X3D with anything listed here is a denial.

Written on T52 — Toxic effect of organic solvents

halogen derivatives of aliphatic and aromatic hydrocarbons (T53.-)

Risk adjustment

T52.4X3D does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

T52.4X3D is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56612Billing and Coding: CT of the Head

Code history

T52.4X3D has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share T52.4X3. If T52.4X3D is not quite right, the correct code is usually one of these.

Questions about T52.4X3D

Is T52.4X3D a billable ICD-10-CM code?: Yes. T52.4X3D is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does T52.4X3D sit in the tabular list?: Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Toxic effects of substances chiefly nonmedicinal as to source (T51-T65).
What cannot be coded together with T52.4X3D?: T52.4X3D carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above T52.4X3D (T52) and apply to it just the same.