Is T56.2X3S a billable ICD-10-CM code?

Yes. T56.2X3S is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does T56.2X3S 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 T56.2X3S?

T56.2X3S 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 T56.2X3S (T56) and apply to it just the same.

T56.2X3S

T56.2X3S — Toxic effect of chromium and its compounds, assault, sequela

Billable / specific codeICD-10-CMPOA exempt

T56.2X3S is a billable, specific ICD-10-CM code for toxic effect of chromium and its compounds, assault, sequela. It is valid for submission on a claim.

7th character "S" — sequela

The appropriate 7th character is to be added to each code from category T56

A: initial encounter
D: subsequent encounter
S: sequela

Excludes1 inherited from the categories above T56.2X3S

These are not written on T56.2X3S, but they bind it: a note on a category applies to every code beneath it. Billing T56.2X3S with anything listed here is a denial.

Written on T56 — Toxic effect of metals

arsenic and its compounds (T57.0)
manganese and its compounds (T57.2)

Risk adjustment

T56.2X3S 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

T56.2X3S 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

T56.2X3S 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 T56.2X3. If T56.2X3S is not quite right, the correct code is usually one of these.

Questions about T56.2X3S

Is T56.2X3S a billable ICD-10-CM code?: Yes. T56.2X3S is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does T56.2X3S 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 T56.2X3S?: T56.2X3S 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 T56.2X3S (T56) and apply to it just the same.