T57.1X1A is the authoritative medical code for Toxic effect of phosphorus and its compounds, accidental (unintentional), initial encounter. This classification is used in medical billing and clinical recording to specify the clinical criteria for toxic effect of phosphorus and its compounds, accidental (unintentional), initial encounter (ICD-10-CM T57.1X1A), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Toxic effect of phosphorus and its compounds, accidental (unintentional), initial encounter is a billable ICD-10-CM diagnosis code T57.1X1A. Inclusion terms: Toxic effect of phosphorus and its compounds NOS. Excludes1 (not coded here): organophosphate insecticides T60.0; 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.-. 7th character: The appropriate 7th character is to be added to each code from category T57.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for T57.1X1A in the official ICD-10-CM tabular list.
Inclusion Terms
Alternative terms the tabular list files under this code.
- Toxic effect of phosphorus and its compounds NOS
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- organophosphate insecticides T60.0
- contact with and suspected exposure to toxic substances Z77.-
Use Additional Code
Supplementary codes the tabular list directs you to add.
- 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.-
Frequently Asked Questions (FAQ) & Clinical Guidance
Does T57.1X1A require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category T57.
What can't be coded together with T57.1X1A?
Per Excludes1 instructions, T57.1X1A must not be reported with: organophosphate insecticides (T60.0); contact with and (suspected) exposure to toxic substances (Z77.-).
Is an additional code needed with T57.1X1A?
Use additional code(s) to specify: 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.-).
What conditions are included under T57.1X1A?
Toxic effect of phosphorus and its compounds, accidental (unintentional), initial encounter includes: Toxic effect of phosphorus and its compounds NOS.
Codes in This Family (40)
Official ICD-10-CM classifications in the same code family as T57.1X1A, with their registry titles.
- T57 — Toxic effect of other inorganic substances
- T57.0 — Toxic effect of arsenic and its compounds
- T57.0X — Toxic effect of arsenic and its compounds
- T57.0X1 — Toxic effect of arsenic and its compounds, accidental (unintentional)
- T57.0X1A — Toxic effect of arsenic and its compounds, accidental (unintentional), initial encounter
- T57.0X1D — Toxic effect of arsenic and its compounds, accidental (unintentional), subsequent encounter
- T57.0X1S — Toxic effect of arsenic and its compounds, accidental (unintentional), sequela
- T57.0X2 — Toxic effect of arsenic and its compounds, intentional self-harm
- T57.0X2A — Toxic effect of arsenic and its compounds, intentional self-harm, initial encounter
- T57.0X2D — Toxic effect of arsenic and its compounds, intentional self-harm, subsequent encounter
- T57.0X2S — Toxic effect of arsenic and its compounds, intentional self-harm, sequela
- T57.0X3 — Toxic effect of arsenic and its compounds, assault
- T57.0X3A — Toxic effect of arsenic and its compounds, assault, initial encounter
- T57.0X3D — Toxic effect of arsenic and its compounds, assault, subsequent encounter
- T57.0X3S — Toxic effect of arsenic and its compounds, assault, sequela
- T57.0X4 — Toxic effect of arsenic and its compounds, undetermined
- T57.0X4A — Toxic effect of arsenic and its compounds, undetermined, initial encounter
- T57.0X4D — Toxic effect of arsenic and its compounds, undetermined, subsequent encounter
- T57.0X4S — Toxic effect of arsenic and its compounds, undetermined, sequela
- T57.1 — Toxic effect of phosphorus and its compounds
- T57.1X — Toxic effect of phosphorus and its compounds
- T57.1X1 — Toxic effect of phosphorus and its compounds, accidental (unintentional)
- T57.1X1D — Toxic effect of phosphorus and its compounds, accidental (unintentional), subsequent encounter
- T57.1X1S — Toxic effect of phosphorus and its compounds, accidental (unintentional), sequela
- T57.1X2 — Toxic effect of phosphorus and its compounds, intentional self-harm
- T57.1X2A — Toxic effect of phosphorus and its compounds, intentional self-harm, initial encounter
- T57.1X2D — Toxic effect of phosphorus and its compounds, intentional self-harm, subsequent encounter
- T57.1X2S — Toxic effect of phosphorus and its compounds, intentional self-harm, sequela
- T57.1X3 — Toxic effect of phosphorus and its compounds, assault
- T57.1X3A — Toxic effect of phosphorus and its compounds, assault, initial encounter
- T57.1X3D — Toxic effect of phosphorus and its compounds, assault, subsequent encounter
- T57.1X3S — Toxic effect of phosphorus and its compounds, assault, sequela
- T57.1X4 — Toxic effect of phosphorus and its compounds, undetermined
- T57.1X4A — Toxic effect of phosphorus and its compounds, undetermined, initial encounter
- T57.1X4D — Toxic effect of phosphorus and its compounds, undetermined, subsequent encounter
- T57.1X4S — Toxic effect of phosphorus and its compounds, undetermined, sequela
- T57.2 — Toxic effect of manganese and its compounds
- T57.2X — Toxic effect of manganese and its compounds
- T57.2X1 — Toxic effect of manganese and its compounds, accidental (unintentional)
- T57.2X1A — Toxic effect of manganese and its compounds, accidental (unintentional), initial encounter
Associated Substances (2)
Substances from the official ICD-10-CM Table of Drugs and Chemicals that map to this code.
- Phosphine
- PhosphorusNEC (compound)
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code T52.1X1A
Toxic effect of benzene, accidental (unintentional), initial encounter
ICD Code T53.1X1A
Toxic effect of chloroform, accidental (unintentional), initial encounter
ICD Code T54.1X1A
Toxic effect of other corrosive organic compounds, accidental (unintentional), initial encounter
ICD Code T55.1X1A
Toxic effect of detergents, accidental (unintentional), initial encounter
ICD Code T56.1X1A
Toxic effect of mercury and its compounds, accidental (unintentional), initial encounter
ICD Code T59.1X1A
Toxic effect of sulfur dioxide, accidental (unintentional), initial encounter
ICD Code T60.1X1A
Toxic effect of halogenated insecticides, accidental (unintentional), initial encounter
ICD Code T62.1X1A
Toxic effect of ingested berries, accidental (unintentional), initial encounter