B18 Chronic viral hepatitis

Name of the Condition

• Chronic viral hepatitis

Summary

Chronic viral hepatitis is a persistent inflammation of the liver caused by viral infection, lasting six months or longer. It can lead to progressive liver damage, fibrosis, cirrhosis, or hepatocellular carcinoma if left untreated. The condition often remains asymptomatic in early stages but may present with nonspecific symptoms as it advances.

Causes

Chronic viral hepatitis is primarily caused by hepatitis B virus (HBV) or hepatitis C virus (HCV). HBV is transmitted through blood, sexual contact, or perinatal exposure, while HCV spreads mainly via blood-to-blood contact. Both viruses can establish long-term infections, with HCV being more likely to progress to chronic disease.

Risk Factors

• Chronic infection with HBV or HCV.
• Unprotected sexual contact with an infected individual.
• Sharing needles or other drug paraphernalia.
• Blood transfusions or organ transplants prior to widespread screening.
• Perinatal exposure to HBV.
• Immunocompromised states, such as HIV co-infection.

Symptoms

• Fatigue, malaise, or unexplained weight loss.
• Abdominal discomfort, particularly in the right upper quadrant.
• Jaundice (yellowing of the skin or eyes).
• Dark urine or pale stools.
• Easy bruising or bleeding due to impaired liver function.

Diagnosis

Diagnosis involves serologic testing to detect viral antigens, antibodies, or nucleic acids. Liver function tests (LFTs) assess enzyme levels and synthetic function. Imaging (e.g., ultrasound) or liver biopsy may evaluate fibrosis or cirrhosis. Viral load quantification helps determine disease activity and guide treatment.

Treatment Options

Treatment depends on the causative virus and disease stage. Antiviral medications (e.g., nucleos(t)ide analogs for HBV, direct-acting antivirals for HCV) suppress viral replication. Lifestyle modifications, such as alcohol avoidance, support liver health. Advanced cases may require monitoring for complications or liver transplantation.

Prognosis and Follow-Up

Prognosis varies by virus, viral load, and treatment response. With effective antiviral therapy, many patients achieve viral suppression and reduced liver damage. Regular follow-up includes LFTs, viral load monitoring, and imaging to assess fibrosis progression. Early intervention improves long-term outcomes.

Complications

• Cirrhosis, leading to portal hypertension or liver failure.
• Hepatocellular carcinoma, particularly in HCV or HBV-related disease.
• Decompensated liver disease, requiring transplantation.
• Increased risk of other infections due to impaired immunity.

Lifestyle & Prevention

• Avoid alcohol and hepatotoxic substances.
• Practice safe sex and avoid sharing needles.
• Ensure vaccination for HBV (if not immune) and follow-up for HCV screening.
• Maintain a balanced diet and regular exercise to support liver health.
• Adhere to prescribed antiviral regimens and attend scheduled appointments.

When to Seek Professional Help

Seek care if experiencing jaundice, severe abdominal pain, unexplained weight loss, or signs of bleeding (e.g., bruising, dark stools). Prompt evaluation is critical for early intervention and to prevent progression to advanced liver disease.

Tips for Medical Coders

Document the specific viral etiology (HBV or HCV) when available, as it may impact coding specificity. Note chronicity (duration >6 months) and any associated complications (e.g., cirrhosis, carcinoma) to ensure accurate code assignment. Include details on treatment response or viral load if relevant to the clinical picture.