2026 ICD-10-CM Diagnosis Code T51.0X1AToxic effect of ethanol, accidental (unintentional), initial encounter
T51.0X1A is a billable ICD-10-CM diagnosis code for toxic effect of ethanol, accidental (unintentional), initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 917 through 918. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under External cause codes: intent of injury, accidental/unintentional; External cause codes: poisoning by non-drug; and Toxic effects, initial encounter.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Accidental poisoning by alcoholic beverage
- Accidental poisoning by denatured alcohol
- Accidental poisoning with ethyl alcohol
- Adverse drug interaction
- Adverse medication interaction with alcohol
- Adverse reaction to alcoholic beverage
- Adverse reaction to ethanol
- Alcoholic macrocytosis
- Alcohol-induced epilepsy
- Alcohol-induced hypoglycemia
- Alcohol-related macrocytosis
- Ataxia caused by ethanol
- Delayed headache caused by alcohol
- Drug interaction with alcohol
- Drug-induced epilepsy
- Non-anemic red cell disorder
- Non-diabetic hypoglycemia
- Osteonecrosis caused by alcohol
- Pain in lymph nodes after alcohol consumption
- Pain of lymph node
- Pain of lymphoreticular structure
- Substance-induced ataxia
- Thrombocytopenia caused by alcohol
- Thrombocytopenia caused by drugs
- Toxic effect of denatured alcohol
- Toxic effect of ethyl alcohol
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Toxic effect of alcohol (T51). Use the following options for the applicable episode of care:
- A - initial encounter
- D - subsequent encounter
- S - sequela
Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Absinthe
an extract of absinthium and other bitter herbs, containing 60% alcohol. prolonged ingestion causes nervousness, convulsions, trismus, amblyopia, optic neuritis, and mental deterioration. (dorland, 27th ed)Alcohol Abstinence
non-consumption of alcoholic beverages.Alcohol-Induced Disorders, Nervous System
acute and chronic neurologic disorders associated with the various neurologic effects of ethanol. primary sites of injury include the brain and peripheral nerves.Alcoholism
a primary, chronic disease with genetic, psychosocial, and environmental factors influencing its development and manifestations. the disease is often progressive and fatal. it is characterized by impaired control over drinking, preoccupation with the drug alcohol, use of alcohol despite adverse consequences, and distortions in thinking, most notably denial. each of these symptoms may be continuous or periodic. (morse & flavin for the joint commission of the national council on alcoholism and drug dependence and the american society of addiction medicine to study the definition and criteria for the diagnosis of alcoholism: in jama 1992;268:1012-4)Darunavir
an hiv protease inhibitor that is used in the treatment of aids and hiv infections. due to the emergence of antiviral drug resistance when used alone, it is administered in combination with other anti-hiv agents.Ethanol
a clear, colorless liquid rapidly absorbed from the gastrointestinal tract and distributed throughout the body. it has bactericidal activity and is used often as a topical disinfectant. it is widely used as a solvent and preservative in pharmaceutical preparations as well as serving as the primary ingredient in alcoholic beverages.Ethanolamine
a viscous, hygroscopic amino alcohol with an ammoniacal odor. it is widely distributed in biological tissue and is a component of lecithin. it is used as a surfactant, fluorimetric reagent, and to remove co2 and h2s from natural gas and other gases.Ethanolamine Ammonia-Lyase
an enzyme that catalyzes the deamination of ethanolamine to acetaldehyde. ec 4.3.1.7.Ethanolaminephosphotransferase
an enzyme that catalyzes reversibly the transfer of phosphoethanolamine from cdp-ethanolamine to diacylglycerol to yield phosphatidylethanolamine (cephalin) and cmp. the enzyme is found in the endoplasmic reticulum. ec 2.7.8.1.Ethanolamines
amino alcohols containing the ethanolamine; (-nh2ch2choh) group and its derivatives.Phosphatidylethanolamines
derivatives of phosphatidic acids in which the phosphoric acid is bound in ester linkage to an ethanolamine moiety. complete hydrolysis yields 1 mole of glycerol, phosphoric acid and ethanolamine and 2 moles of fatty acids.Quetiapine Fumarate
a dibenzothiazepine and antipsychotic agent that targets the serotonin 5-ht2 receptor; histamine h1 receptor, adrenergic alpha1 and alpha2 receptors, as well as the dopamine d1 receptor and dopamine d2 receptor. it is used in the treatment of schizophrenia; bipolar disorder and depressive disorder.
Table of Drugs and ChemicalsClinical
Substances in the Table of Drugs and Chemicals that reference this code family. Always confirm in the Tabular List before coding.
| Substance | Accidental | Self-harm | Assault | Undetermined | Adverse Effect | Underdosing |
|---|---|---|---|---|---|---|
| Absinthe | T51.0X1 | T51.0X2 | T51.0X3 | T51.0X4 | – | – |
| Absinthe::beverage | T51.0X1 | T51.0X2 | T51.0X3 | T51.0X4 | – | – |
| Denatured alcohol | T51.0X1 | T51.0X2 | T51.0X3 | T51.0X4 | – | – |
| Ethanol | T51.0X1 | T51.0X2 | T51.0X3 | T51.0X4 | – | – |
| Ethanol::beverage | T51.0X1 | T51.0X2 | T51.0X3 | T51.0X4 | – | – |
| Grain alcohol | T51.0X1 | T51.0X2 | T51.0X3 | T51.0X4 | – | – |
| Industrial | T51.0X1 | T51.0X2 | T51.0X3 | T51.0X4 | – | – |
| Industrial::alcohol | T51.0X1 | T51.0X2 | T51.0X3 | T51.0X4 | – | – |
| Industrial::fumes | T51.0X1 | T51.0X2 | T51.0X3 | T51.0X4 | – | – |
| Industrial::solvents (fumes) (vapors) | T51.0X1 | T51.0X2 | T51.0X3 | T51.0X4 | – | – |
| Neutral spirits | T51.0X1 | T51.0X2 | T51.0X3 | T51.0X4 | – | – |
| Neutral spirits::beverage | T51.0X1 | T51.0X2 | T51.0X3 | T51.0X4 | – | – |
| Spirit (s) (neutral) NEC | T51.0X1 | T51.0X2 | T51.0X3 | T51.0X4 | – | – |
| Spirit (s) (neutral) NEC::beverage | T51.0X1 | T51.0X2 | T51.0X3 | T51.0X4 | – | – |
| Spirit (s) (neutral) NEC::industrial | T51.0X1 | T51.0X2 | T51.0X3 | T51.0X4 | – | – |
| Spirit (s) (neutral) NEC::mineral | T51.0X1 | T51.0X2 | T51.0X3 | T51.0X4 | – | – |
| Spirit (s) (neutral) NEC::of salt | T51.0X1 | T51.0X2 | T51.0X3 | T51.0X4 | – | – |
| Spirit (s) (neutral) NEC::surgical | T51.0X1 | T51.0X2 | T51.0X3 | T51.0X4 | – | – |
Patient EducationClinical
Alcohol
Many Americans drink alcohol at least occasionally. The Dietary Guidelines for Americans say that adults of legal drinking age should either not drink or drink in moderation. Drinking less is better for your health than drinking more. Also, there are some people who should not drink at all.
The full article covers:
- How does alcohol affect the body?
- Why are the effects of alcohol different from person to person?
- What is moderate drinking?
- What is a standard drink?
- Who should not drink alcohol?
- What is excessive drinking?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert T51.0X1A to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T51.0X1AOverview
Is T51.0X1A (Toxic effect of ethanol, accidental (unintentional)) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report toxic effect of ethanol, accidental (unintentional), initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in T51.0X1A mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for toxic effect of ethanol, accidental (unintentional), such as an emergency visit or first evaluation.
What MS-DRG does T51.0X1A group to?
When toxic effect of ethanol, accidental (unintentional), initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 917, 918, with relative weights from 0.8571 to 1.5684 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of T51.0X1A?
Under the General Equivalence Mappings, toxic effect of ethanol, accidental (unintentional), initial encounter converts to ICD-9-CM 980.0 (toxic eff ethyl alcohol) and E860.1 (acc poison-ethyl alcohol). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
