ICD-10-CM Diagnosis Code T51.1X4 - Toxic effect of methanol, undetermined (original) (raw)

ICD List 2025-2026 Edition

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2. ICD-10-CM Codes
3. S00–T88
4. T51-T65
5. T51
6. 2026 ICD-10-CM Code T51.1X4

Toxic effect of methanol, undetermined

ICD-10-CM Code:

T51.1X4

ICD-10 Code for:

Toxic effect of methanol, undetermined

Is Billable?

Not Valid for Submission

Code Navigator:

T51.1X4 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity from the list below for a diagnosis of toxic effect of methanol, undetermined. The code is not specific and is NOT valid for the year 2026 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Non-specific codes like T51.1X4 require more digits to indicate the appropriate level of specificity. Consider using any of the following billable codes with a higher level of specificity when coding for toxic effect of methanol, undetermined:

Use T51.1X4A for initial encounter

Use T51.1X4D for subsequent encounter

Use T51.1X4S for sequela

1. Code Information
2. Specific Coding
3. Approximate Synonyms
4. Coding Guidelines
5. Tabular List of Diseases and Injuries
6. Table of Drugs and Chemicals
7. Patient Education
8. Other Codes Used Similar Conditions
9. Code History

• Injury, poisoning and certain other consequences of external causes
  S00–T88
  • Toxic effects of substances chiefly nonmedicinal as to source
    T51-T65
    * Toxic effect of alcohol
    T51

The following list of clinical terms are approximate synonyms, alternative descriptions, or common phrases that might be used by patients, healthcare providers, or medical coders to describe the same condition. These synonyms and related diagnosis terms are often used when searching for an ICD-10 code, especially when the exact medical terminology is unclear. Whether you're looking for lay terms, similar diagnosis names, or common language alternatives, this list can help guide you to the correct ICD-10 classification.

• Parkinsonism caused by drug
• Parkinsonism caused by methanol

The appropriate 7th character is to be added to each code from block Toxic effect of alcohol (T51). Use the following options for the aplicable episode of care:

• A - initial encounter
• D - subsequent encounter
• S - sequela

The code is referenced in the Table of Drugs and Chemicals, this table contains a classification of drugs, industrial solvents, corrosive gases, noxious plants, pesticides, and other toxic agents.

According to ICD-10-CM coding guidelines it is advised to do not code directly from the Table of Drugs and Chemicals, instead always refer back to the Tabular List when doing the initial coding. Each substance in the table is assigned a code according to the poisoning classification and external causes of adverse effects. It is important to use as many codes as necessary to specify all reported drugs, medicinal or chemical substances. If the same diagnosis code describes the causative agent for more than one adverse reaction, poisoning, toxic effect or underdosing, utilize the code only once.

Filter table of drugs and chemicals:

• FY 2026 - No Change, effective from 10/1/2025 through 9/30/2026

• FY 2025 - No Change, effective from 10/1/2024 through 9/30/2025

• FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024

• FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023

• FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022

• FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021

• FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

• FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019

• FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018

• FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017

• FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.

• Previous Code: T51.1X3S

• Parent Code: T51.1X3

• Next Code: T51.1X4A