K70.0

Alcoholic fatty liver

Alcoholic fatty liver, also known as alcoholic hepatic steatosis, represents the earliest and most common stage of alcohol-induced liver disease. It is characterized by the excessive accumulation of triglycerides within hepatocytes (macrovesicular steatosis) as a direct metabolic consequence of ethanol metabolism. When alcohol is oxidized in the liver, it increases the NADH/NAD+ ratio, which inhibits fatty acid oxidation and promotes lipogenesis. While often asymptomatic and potentially reversible with total abstinence from alcohol, continued consumption can lead to more severe conditions such as alcoholic hepatitis or cirrhosis. This condition is frequently identified incidentally during imaging or via physical examination showing hepatomegaly.

Clinical Symptoms

Hepatomegaly (enlarged liver)
Right upper quadrant abdominal discomfort
Fatigue
Malaise
Nausea
Unintentional weight loss
Mild jaundice (rare in simple steatosis)
Dull abdominal ache

Common Causes

Chronic excessive ethanol consumption
Heavy episodic drinking (binge drinking)
Genetic polymorphisms in alcohol-metabolizing enzymes (ADH/ALDH)
Nutritional deficiencies common in chronic alcoholism
Co-existing metabolic syndrome (obesity and insulin resistance)
Gender-related susceptibility (increased risk in females per gram of alcohol consumed)
Concomitant chronic viral hepatitis

Documentation & Coding Tips

Distinguish between alcoholic and non-alcoholic fatty liver disease (NAFLD) by documenting specific alcohol consumption thresholds.

Example: Patient consumes 4-5 standard drinks daily (35-40g ethanol), exceeding the threshold for non-alcoholic fatty liver disease. Imaging confirms hepatic steatosis. Assessment: Alcoholic fatty liver (K70.0) secondary to alcohol dependence (F10.20). Patient advised on absolute abstinence to reverse steatosis.

Billing Focus: Identify the specific causal relationship between alcohol intake and the liver findings to support the selection of K70 over K76.0.

Document the absence of more severe alcoholic liver manifestations like hepatitis, fibrosis, or cirrhosis to justify K70.0 specificity.

Example: Livers function tests show mild AST/ALT elevation with AST:ALT ratio of 2:1. Ultrasound reveals diffuse echogenicity consistent with steatosis. No clinical or radiologic evidence of ascites, splenomegaly, or esophageal varices. Diagnosis: Alcoholic fatty liver (K70.0).

Billing Focus: Coding requires excluding K70.1-K70.4. Clinical documentation of 'fatty liver' without mentions of cirrhosis or hepatitis supports the specific K70.0 code.

Link comorbid behavioral health conditions, such as alcohol use, abuse, or dependence, to the liver condition.

Example: Patient with established alcohol dependence (F10.20) presents with right upper quadrant discomfort. Physical exam reveals hepatomegaly (14 cm). Laboratory results show GGT elevation of 120 U/L. Assessment: Alcoholic fatty liver (K70.0) in the setting of chronic alcohol dependence.

Billing Focus: Reporting the behavioral health code alongside K70.0 provides a complete clinical picture for medical necessity for high-level E/M services.

Explicitly mention liver size and texture if determined via physical examination or imaging.

Example: Abdominal ultrasound demonstrates a bright, enlarged liver measuring 16.5 cm in the midclavicular line, consistent with hepatomegaly and grade 2 steatosis. Assessment: Alcoholic fatty liver (K70.0) with hepatomegaly (R16.0).

Billing Focus: Laterality is not applicable to the liver, but the documentation of hepatomegaly as a manifestation supports the medical necessity of additional diagnostic tests like elastography.

Include BMI and nutritional status to identify co-factors influencing the progression of alcoholic steatosis.

Example: Patient with alcoholic fatty liver (K70.0) and BMI of 34.2 (E66.9). Nutritional screen reveals Vitamin B1 deficiency and protein-calorie malnutrition. The interplay of alcohol-induced steatosis and obesity increases the risk of progression to steatohepatitis.

Billing Focus: Supports the use of obesity codes (E66 series) and Z68 series (BMI) as secondary diagnoses to reflect the total complexity of the management plan.

Relevant CPT Codes

99213 - Office or other outpatient visit, established patient, 20-29 minutes
Used for routine follow-up of stable alcoholic fatty liver where MDM is low and limited data is reviewed.
99214 - Office or other outpatient visit, established patient, 30-39 minutes
Appropriate when the patient has multiple comorbidities (e.g., DM, Obesity) or requires complex counseling regarding alcohol dependence and liver disease.
76700 - Ultrasound, abdominal, real time with image documentation; complete
Standard imaging modality used to identify hepatic steatosis and measure liver size in K70.0 cases.
91200 - Liver elastography, percutaneous, through-the-skin
Critical for determining if simple alcoholic fatty liver (K70.0) has progressed to fibrosis (K70.2).
80076 - Hepatic function panel
Essential laboratory monitoring to assess liver injury and cellular integrity in alcoholic patients.
99408 - Alcohol screening and brief intervention (SBI), 15 to 30 minutes
Specific intervention aimed at treating the underlying cause of K70.0 (Alcohol consumption).
96160 - Administration of patient-focused health risk assessment
Used to objectively quantify the patient's alcohol use risk to justify the K70.0 diagnosis.
82055 - Alcohol (ethanol); any specimen except breath
Used to confirm recent alcohol intake or monitor compliance with abstinence recommendations.
47100 - Biopsy of liver, wedge
Gold standard for definitive staging of steatosis versus hepatitis or fibrosis, used when non-invasive tests are inconclusive.
99203 - Office or other outpatient visit, new patient, 30-44 minutes
Initial consultation for a patient recently diagnosed with fatty liver on imaging for other reasons.