K75.81 Nonalcoholic steatohepatitis (NASH)

Name of the Condition

• Nonalcoholic steatohepatitis (NASH) (ICD-10 Code: K75.81)

Summary

Nonalcoholic steatohepatitis (NASH) is a progressive form of liver disease characterized by inflammation and liver cell damage, often associated with fat accumulation in the liver. It is part of the broader spectrum of nonalcoholic fatty liver disease (NAFLD) and can lead to fibrosis, cirrhosis, or liver failure if left untreated.

Causes

The exact cause of NASH is not fully understood, but it is linked to metabolic dysfunction, including insulin resistance, obesity, and type 2 diabetes. Other contributing factors may include genetic predisposition, oxidative stress, and gut microbiota imbalances.

Risk Factors

Risk factors for NASH include obesity, type 2 diabetes, metabolic syndrome, high cholesterol, and hypertension. Additional factors may include rapid weight loss, certain medications, and genetic susceptibility.

Symptoms

Symptoms are often mild or absent in early stages. As the disease progresses, individuals may experience fatigue, abdominal discomfort (especially in the upper right quadrant), and signs of liver dysfunction such as jaundice or swelling.

Diagnosis

Diagnosis typically involves a combination of blood tests to assess liver function, imaging studies (e.g., ultrasound or MRI) to detect fat accumulation, and sometimes a liver biopsy to confirm inflammation and rule out other causes.

Treatment Options

Treatment focuses on managing underlying metabolic conditions, such as weight loss through diet and exercise, controlling diabetes, and addressing lipid abnormalities. In some cases, medications targeting insulin resistance or liver inflammation may be considered.

Prognosis and Follow-Up

Prognosis varies; early intervention can slow or reverse disease progression. Regular monitoring of liver function and imaging is recommended to assess for fibrosis or cirrhosis. Advanced cases may require specialized care or liver transplantation.

Complications

Complications of NASH include liver fibrosis, cirrhosis, liver failure, and an increased risk of hepatocellular carcinoma. Cardiovascular disease risk may also be elevated due to associated metabolic factors.

Lifestyle & Prevention

Lifestyle modifications, such as maintaining a healthy weight, adopting a balanced diet, and engaging in regular physical activity, are key to preventing or managing NASH. Avoiding excessive alcohol and managing comorbid conditions are also important.

When to Seek Professional Help

Seek medical attention if you experience persistent abdominal pain, unexplained fatigue, jaundice, or signs of liver dysfunction. Early evaluation is critical for managing progression and complications.

Tips for Medical Coders

Document the presence of steatosis (fatty liver) and inflammation to support the diagnosis of NASH. Ensure clinical documentation aligns with the code’s specificity, including any associated metabolic conditions or fibrosis staging when available.