T51.1X1A is the authoritative medical code for Toxic effect of methanol, accidental (unintentional), initial encounter. This classification is used in medical billing and clinical recording to specify the clinical criteria for toxic effect of methanol, accidental (unintentional), initial encounter (ICD-10-CM T51.1X1A), 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 methanol, accidental (unintentional), initial encounter is a billable ICD-10-CM diagnosis code T51.1X1A. Inclusion terms: Toxic effect of methanol NOS. 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.-. 7th character: The appropriate 7th character is to be added to each code from category T51.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for T51.1X1A in the official ICD-10-CM tabular list.
Inclusion Terms
Alternative terms the tabular list files under this code.
- Toxic effect of methanol NOS
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- 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 T51.1X1A require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category T51.
What can't be coded together with T51.1X1A?
Per Excludes1 instructions, T51.1X1A must not be reported with: contact with and (suspected) exposure to toxic substances (Z77.-).
Is an additional code needed with T51.1X1A?
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 T51.1X1A?
Toxic effect of methanol, accidental (unintentional), initial encounter includes: Toxic effect of methanol NOS.
Codes in This Family (40)
Official ICD-10-CM classifications in the same code family as T51.1X1A, with their registry titles.
- T51 — Toxic effect of alcohol
- T51-T65 — Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)
- T51.0 — Toxic effect of ethanol
- T51.0X — Toxic effect of ethanol
- T51.0X1 — Toxic effect of ethanol, accidental (unintentional)
- T51.0X1A — Toxic effect of ethanol, accidental (unintentional), initial encounter
- T51.0X1D — Toxic effect of ethanol, accidental (unintentional), subsequent encounter
- T51.0X1S — Toxic effect of ethanol, accidental (unintentional), sequela
- T51.0X2 — Toxic effect of ethanol, intentional self-harm
- T51.0X2A — Toxic effect of ethanol, intentional self-harm, initial encounter
- T51.0X2D — Toxic effect of ethanol, intentional self-harm, subsequent encounter
- T51.0X2S — Toxic effect of ethanol, intentional self-harm, sequela
- T51.0X3 — Toxic effect of ethanol, assault
- T51.0X3A — Toxic effect of ethanol, assault, initial encounter
- T51.0X3D — Toxic effect of ethanol, assault, subsequent encounter
- T51.0X3S — Toxic effect of ethanol, assault, sequela
- T51.0X4 — Toxic effect of ethanol, undetermined
- T51.0X4A — Toxic effect of ethanol, undetermined, initial encounter
- T51.0X4D — Toxic effect of ethanol, undetermined, subsequent encounter
- T51.0X4S — Toxic effect of ethanol, undetermined, sequela
- T51.1 — Toxic effect of methanol
- T51.1X — Toxic effect of methanol
- T51.1X1 — Toxic effect of methanol, accidental (unintentional)
- T51.1X1D — Toxic effect of methanol, accidental (unintentional), subsequent encounter
- T51.1X1S — Toxic effect of methanol, accidental (unintentional), sequela
- T51.1X2 — Toxic effect of methanol, intentional self-harm
- T51.1X2A — Toxic effect of methanol, intentional self-harm, initial encounter
- T51.1X2D — Toxic effect of methanol, intentional self-harm, subsequent encounter
- T51.1X2S — Toxic effect of methanol, intentional self-harm, sequela
- T51.1X3 — Toxic effect of methanol, assault
- T51.1X3A — Toxic effect of methanol, assault, initial encounter
- T51.1X3D — Toxic effect of methanol, assault, subsequent encounter
- T51.1X3S — Toxic effect of methanol, assault, sequela
- T51.1X4 — Toxic effect of methanol, undetermined
- T51.1X4A — Toxic effect of methanol, undetermined, initial encounter
- T51.1X4D — Toxic effect of methanol, undetermined, subsequent encounter
- T51.1X4S — Toxic effect of methanol, undetermined, sequela
- T51.2 — Toxic effect of 2-Propanol
- T51.2X — Toxic effect of 2-Propanol
- T51.2X1 — Toxic effect of 2-Propanol, accidental (unintentional)
Associated Substances (7)
Substances from the official ICD-10-CM Table of Drugs and Chemicals that map to this code.
- Canned heat
- Carbinol
- Methanol (vapor)
- Methylated spirit
- Radiator alcohol
- Wood alcohol or spirit
- Zerone
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:
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