T57.91XD – Toxic effect of unspecified inorganic substance, accidental (unintentional), subsequent encounter

ICD-10-CM 2027 diagnosis code · Toxic effects of substances chiefly nonmedicinal as to source

Billable code

ICD-10-CM code T57.91XD

Code: T57.91XD (claims format: T5791XD)
Description: Toxic effect of unspecified inorganic substance, accidental (unintentional), subsequent encounter
Short description: Toxic effect of unsp inorganic substance, accidental, subs
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 19. Injury, poisoning and certain other consequences of external causes (S00-T88)
Block: T51-T65 Toxic effects of substances chiefly nonmedicinal as to source
Parent codes: T57 › T57.9 › T57.91

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care.

Character	Meaning
`A`	initial encounter
`D`	subsequent encounter
`S`	sequela

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

T57 – Toxic effect of other inorganic substances

7th character note:

The appropriate 7th character is to be added to each code from category T57

Block T51-T65

Excludes1 (not coded here):

contact with and (suspected) exposure to toxic substances (Z77.-)

Use additional code:

code(s):
for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)
personal history of foreign body fully removed (Z87.821)
to identify any retained foreign body, if applicable (Z18.-)

Notes:

When no intent is indicated code to accidental. Undetermined intent is only for use when there is specific documentation in the record that the intent of the toxic effect cannot be determined.

Related codes in T57.91

Frequently asked questions

What is ICD-10 code T57.91XD?

T57.91XD is the ICD-10-CM code for toxic effect of unspecified inorganic substance, accidental (unintentional), subsequent encounter, in the block T51-T65 (Toxic effects of substances chiefly nonmedicinal as to source).

Is T57.91XD a billable code?

Yes. T57.91XD is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does T57.91XD belong to?

It belongs to category T57 – Toxic effect of other inorganic substances.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.