T56.1X — Toxic effects of mercury and its compounds
Is T56.1X billable?
No — T56.1X is a non-billable header code. T56.1X groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 12 billable codes beneath T56.1X.
Billable codes under this header
- T56.1X1AToxic effect of mercury and its compounds, accidental (unintentional), initial encounter
- T56.1X1DToxic effect of mercury and its compounds, accidental (unintentional), subsequent encounter
- T56.1X1SToxic effect of mercury and its compounds, accidental (unintentional), sequela
- T56.1X2AToxic effect of mercury and its compounds, intentional self-harm, initial encounter
- T56.1X2DToxic effect of mercury and its compounds, intentional self-harm, subsequent encounter
- T56.1X2SToxic effect of mercury and its compounds, intentional self-harm, sequela
- T56.1X3AToxic effect of mercury and its compounds, assault, initial encounter
- T56.1X3DToxic effect of mercury and its compounds, assault, subsequent encounter
- T56.1X3SToxic effect of mercury and its compounds, assault, sequela
- T56.1X4AToxic effect of mercury and its compounds, undetermined, initial encounter
- T56.1X4DToxic effect of mercury and its compounds, undetermined, subsequent encounter
- T56.1X4SToxic effect of mercury and its compounds, undetermined, sequela
T56.1X at a glance
| Code | T56.1X |
|---|---|
| Description | Toxic effects of mercury and its compounds |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is T56.1X listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T56.1, the nearest indexed parent of T56.1X. Use them to find the family, then select the specific code.
- Minamata disease
Excludes1 — never code together — inherited from T51-T65
The conditions below can never be reported together with T56.1X on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- contact with and (suspected) exposure to toxic substances (Z77.-)
Excludes1 — never code together — inherited from T56
The conditions below can never be reported together with T56.1X on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Use additional code — inherited from Chapter 19
Report an additional code alongside T56.1X to fully describe the condition. T56.1X is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T51-T65
Report an additional code alongside T56.1X to fully describe the condition. T56.1X is sequenced first.
Use additional code — inherited from T56
Report an additional code alongside T56.1X to fully describe the condition. T56.1X is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T56.1X, but a patient may have both at the same time. When documentation supports it, T56.1X and the excluded code may both be reported.
What codes fall under T56.1X? (4)
- T56.1X1Toxic effect of mercury and its compounds, accidental (unintentional)not billable
- T56.1X2Toxic effect of mercury and its compounds, intentional self-harmnot billable
- T56.1X3Toxic effect of mercury and its compounds, assaultnot billable
- T56.1X4Toxic effect of mercury and its compounds, undeterminednot billable
How long has T56.1X existed?
T56.1X has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.