B18.2 Chronic viral hepatitis C

Name of the Condition

• Chronic viral hepatitis C

Summary

Chronic viral hepatitis C is a persistent inflammation of the liver caused by the hepatitis C virus (HCV), 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 C is caused by the hepatitis C virus (HCV). HCV spreads mainly via blood-to-blood contact, including sharing needles or other drug paraphernalia, unscreened blood transfusions, or organ transplants. The virus can establish long-term infection, with most acute infections progressing to chronic disease.

Risk Factors

• Chronic infection with HCV.
• Sharing needles or other drug paraphernalia.
• Unscreened blood transfusions or organ transplants.
• Healthcare exposure to infected blood (e.g., needlestick injuries).
• Born to an HCV-positive mother.
• 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 HCV antibodies, followed by confirmatory nucleic acid testing (e.g., PCR) to identify active infection. Liver function tests (LFTs) and imaging (e.g., ultrasound) assess liver damage. Biopsy or non-invasive fibrosis tests may evaluate disease progression.

Treatment Options

Treatment typically includes direct-acting antiviral (DAA) medications, which target specific steps in the HCV lifecycle. These regimens are highly effective, with cure rates exceeding 90% in most cases. Treatment duration and specific drugs depend on viral genotype, liver damage, and patient factors.

Prognosis and Follow-Up

With effective treatment, many patients achieve sustained virologic response (SVR), indicating cure. Untreated chronic HCV may progress to cirrhosis or liver cancer over decades. Regular follow-up with LFTs and imaging monitors liver health, even after successful treatment.

Complications

• Cirrhosis (scarring of the liver).
• Hepatocellular carcinoma (liver cancer).
• Liver failure requiring transplantation.
• Extrahepatic manifestations (e.g., cryoglobulinemia, kidney disease).

Lifestyle & Prevention

• Avoid sharing needles or drug paraphernalia.
• Use barrier protection during sexual contact with new partners.
• Ensure medical procedures use sterile equipment.
• Get vaccinated for hepatitis A and B to reduce liver stress.
• Limit alcohol consumption to protect liver function.

When to Seek Professional Help

Seek care if you experience jaundice, persistent fatigue, abdominal pain, or unexplained weight loss. Early evaluation is critical for those with known HCV exposure or risk factors, as timely treatment improves outcomes.

Tips for Medical Coders

Code B18.2 is used for chronic viral hepatitis C. Document the presence of chronic infection, confirmatory testing (e.g., HCV RNA), and any associated liver damage (e.g., fibrosis, cirrhosis) to support coding accuracy. Include details on treatment status (e.g., active infection, post-treatment) when available.