T56.9
Toxic effects of unspecified metal
Not billable — category only FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 9 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 4 never code together
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
7th character 3
A initial encounter
D subsequent encounter
S sequela
Instructional notes 6
T56code
S00-T88chapter
Notes
- Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
- The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.
Use additional code
- code to identify any retained foreign body, if applicable (Z18.-)Z18.-
Index entries leading here filed at null
No alphabetic index entry points at this code.
Alongside this code 9 same parent — T56
T56.0 Toxic effects of lead and its compounds category T56.1 Toxic effects of mercury and its compounds category T56.2 Toxic effects of chromium and its compounds category T56.3 Toxic effects of cadmium and its compounds category T56.4 Toxic effects of copper and its compounds category T56.5 Toxic effects of zinc and its compounds category T56.6 Toxic effects of tin and its compounds category T56.7 Toxic effects of beryllium and its compounds category T56.8 Toxic effects of other metals category
Subordinate codes 4
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.