
Alcohol abuse is a mental and behavioural disorder that falls under Chapter 5: Mental, Behavioural and Neurodevelopmental Disorders in the ICD-10-CM. The ICD-10-CM code for uncomplicated alcohol dependence is F10.20, and F10.121 is the code for Alcohol abuse with intoxication delirium. The ICD-10-CM coding system requires the underlying condition to be sequenced first, followed by the manifestation.
| Characteristics | Values |
|---|---|
| ICD-10-CM Code | F10.20 |
| Description | Alcohol dependence, uncomplicated |
| Chapter | 5: Mental, Behavioral and Neurodevelopmental Disorders |
| Underlying Condition | Required to be sequenced first |
| Additional Notes | "Use additional code" and "code first" indicate the proper sequencing order of the codes, etiology followed by manifestation |
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What You'll Learn

F10.20: Alcohol Dependence, Uncomplicated
Alcohol dependence is a mental and behavioural disorder classified under the ICD-10-CM code F10.20. This code specifically refers to alcohol dependence that is uncomplicated. The letter 'F' in the code indicates that the condition falls under Chapter 5: Mental, Behavioural and Neurodevelopmental Disorders. The number '1' signifies that the disorder is due to psychoactive substance use, in this case, alcohol.
The ICD-10-CM (International Classification of Diseases, 10th Revision, Clinical Modification) is a system used to classify diseases and disorders, providing a common language for medical professionals to communicate about various health conditions. It is essential for diagnosing and treating patients effectively, as well as for insurance reimbursement and research purposes.
The ICD-10-CM code F10.20 for alcohol dependence, uncomplicated, was listed by the Centers for Medicare and Medicaid Services and the National Center for Health Statistics in 2018. This code is specifically used to indicate alcohol dependence without any additional complications. Alcohol dependence is a serious condition characterised by a person's physical and psychological dependence on alcohol.
It is important to note that the ICD-10-CM codes related to substance use disorders provide important specificity regarding the substance involved and the nature and severity of the problem. For example, another code, F10.121, represents "Alcohol abuse with intoxication delirium," indicating a different level of severity and specific complications compared to F10.20.
The ICD-10-CM coding system plays a crucial role in the field of psychology and substance use disorder treatment. Psychologists and healthcare professionals who assess and treat individuals with alcohol dependence or other substance use disorders are expected to utilise these codes accurately to ensure effective diagnosis, treatment, and reimbursement.
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F10.121: Alcohol Abuse with Intoxication Delirium
F10.121 is the ICD-10 code for "Alcohol abuse with intoxication delirium". The ICD-10-CM coding system follows a specific format: the letter F indicates that the code is from Chapter 5: Mental, Behavioural and Neurodevelopmental Disorders, and the numeral 1 indicates a mental or behavioural disorder due to psychoactive substance use. The first digit after the decimal point, in this case, a 0, signifies the problematic substance. The remaining digits after the decimal point add further specificity by indicating the nature and severity of the problem.
In most cases, the manifestation codes will have the title "in diseases classified elsewhere". These codes are never permitted to be used as the first listed or principal diagnosis codes. They must be used in conjunction with an underlying condition code and listed following the underlying condition. The underlying condition must be sequenced first, followed by the manifestation, and instructional notes indicate the proper sequencing order of the codes.
The ICD-10-CM section on substance use disorders is substantially larger and more detailed than that of ICD-9-CM. Psychologists who assess or treat individuals with substance use disorders are expected to indicate the substance involved and the degree of the problem through their choice of diagnostic codes.
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Coding conventions: Underlying condition sequenced first
When it comes to the topic of alcohol abuse and its ICD-10 code, it is important to understand the coding conventions, specifically the guideline that states "underlying condition sequenced first". This instruction is crucial when dealing with conditions that have both underlying causes and manifestations throughout multiple body systems.
The ICD-10-CM coding convention for alcohol-related disorders follows this guideline. The underlying condition, in this case, alcohol dependence, is sequenced first, followed by the manifestation, which could be various health issues arising from alcohol abuse. This sequencing is indicated by instructional notes in the tabular/coding conventions. The etiology code will have a "use additional code" note, while the manifestation code will have a "code first" note. These notes ensure that the codes are sequenced correctly, with the etiology code always coming first.
For example, let's consider a patient with alcohol dependence who develops liver disease as a result of their alcohol abuse. In this case, the underlying condition of alcohol dependence (F10.20) would be sequenced first, followed by the manifestation of liver disease. This sequencing ensures that the underlying cause of the health issue is addressed while also accurately representing the specific diagnosis.
It is important to note that the sequencing of codes can vary depending on the circumstances of the encounter and the focus of admission. In some cases, the manifestation may be the primary reason for admission, and there may not be clear instructional notes to follow. In these situations, coders must use their judgment and refer to the specific guidelines provided by the ICD10-CM.
Additionally, there are cases where unspecified or symptom codes are used. This occurs when the diagnosis is not confirmed or when the medical record does not contain enough information to assign a more specific code. These unspecified or symptom codes are acceptable when they accurately reflect the healthcare encounter.
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Reimbursement claims: Use of ICD-10-CM codes required after October 1, 2015
On October 1, 2015, the healthcare industry transitioned from ICD-9 to ICD-10 codes for diagnoses and inpatient procedures. The mandate applies to all health plans and medical transactions that use ICD codes, including Medicare and Medicaid. This means that for reimbursement claims, the ICD-10-CM codes must be used for services provided on or after October 1, 2015.
The ICD-10-CM has a specific coding convention for alcohol-related disorders. This convention requires that the underlying condition is sequenced first, followed by the manifestation. For example, the code F10.20 indicates alcohol dependence, uncomplicated. This code would be listed after the underlying condition code, as per the etiology/manifestation convention.
It is important to note that ICD-9-CM codes are still valid for services provided before October 1, 2015. If a service began before this date but continued after it, the ICD-9-CM code should still be used, and no updates are required. However, for services starting on or after October 1, 2015, the ICD-10-CM codes must be used for reimbursement claims.
The transition to ICD-10 codes has had a significant impact on the healthcare industry, as these codes are more specific and numerous than ICD-9 codes. It is crucial for providers to submit the correct ICD-10-CM codes on reimbursement claims to ensure accurate and timely reimbursement. Failure to use the correct codes may result in claim denials or delays in payment.
The ICD-10 codes are regularly updated to reflect changes in medical knowledge and practice. For example, the FY 2024 ICD-10-CM update addressed typographical errors, while the FY 2025 update introduced new codes for discharges and patient encounters. These updates ensure that the ICD-10-CM codes remain current and accurate, enabling consistent and standardized medical coding across the healthcare industry.
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Substance use codes: Format F1x.xxx
The ICD-10-CM (International Classification of Diseases, 10th Revision, Clinical Modification) is a system of diagnostic codes used by medical providers, insurers, and health care administrators. It is updated annually by the National Center for Health Statistics (NCHS), the federal agency responsible for the use of the ICD-10 in the US.
Substance use codes in ICD-10-CM follow the format F1x.xxx. The letter F indicates that the code is from Chapter 5: Mental, Behavioral and Neurodevelopmental Disorders. The numeral 1 indicates a mental or behavioural disorder due to psychoactive substance use. The next digit, represented by the first x, signifies the problematic substance. The digits after the decimal point add further specificity, indicating the nature and severity of the problem. For example, F10.121 is the code for "Alcohol abuse with intoxication delirium".
The ICD-10-CM diagnostic codes recommended by DSM-5 are F1x.10 for a mild substance use disorder and F1x.20 for both moderate and severe substance use disorders. The code 'x' indicates the class of substance: '0' for alcohol use disorder, '1' for opioid use disorder, '2' for cannabis use disorder, and so on.
As of October 1, 2017, there are different ICD-10-CM codes for active substance use disorder and substance use disorder in remission. Mild substance use disorder in remission is coded as F1x.11, while moderate and severe substance use disorder in remission is coded as F1x.21.
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Frequently asked questions
The ICD-10-CM code for uncomplicated alcohol dependence is F10.20.
The letter F indicates a mental, behavioural or neurodevelopmental disorder, while the numeral 1 indicates a mental or behavioural disorder due to psychoactive substance use. The next digit signifies the substance causing the disorder.
F10.121 is the code for "Alcohol abuse with intoxication delirium".
The ICD-10-CM codes for substance use disorders follow the format F1x.xxx, where x.xxx adds further specificity by indicating the nature and severity of the problem.
ICD-10-CM diagnostic coding for substance use disorders became mandatory on October 1, 2015.



























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