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Immunoglobulin M (IgM) against Hepatitis C Virus (HCV) Antibody

Published: August 9, 2026Updated: August 16, 2026

This test detects antibodies to the Hepatitis C virus (IgM class), which may indicate an early or active infection with the virus responsible for liver disease.

Quick summary

["An IgM HCV test helps identify if you’ve recently been exposed to Hepatitis C."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
10494-3
Short code
IgM HC Ag Tiss Ql ImStn
Synonyms
IgM HC Ag Tiss Ql ImStn
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
immune-stain
CPT
82784
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What This Test Measures

This test measures the presence of Immunoglobulin M (IgM) antibodies specific to Hepatitis C virus proteins. IgM antibodies are typically produced shortly after infection and can help identify early stages of Hepatitis C.

Why It’s Done

Doctors may order this test if you have symptoms of liver disease, a history of exposure to Hepatitis C, or if you’re part of a group at higher risk (e.g., intravenous drug use, blood transfusions before 1992, or certain medical procedures). It can also be used alongside other tests to confirm or monitor Hepatitis C infection.

Sample Collection and Preparation

This test uses a blood sample collected from a vein in your arm. The blood is processed to separate serum (the liquid part) for analysis.

What to Expect Before the Test

No special preparation is needed, but inform your healthcare provider about any medications you’re taking or recent illnesses. Avoid alcohol before the test as it may affect liver function tests.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Positive IgM HCV antibodies suggest recent Hepatitis C infection. However, they can also be present in people who have been infected for months or years. This test alone cannot distinguish between acute and chronic infection. It is often used in combination with other tests, such as IgG HCV antibodies or viral load testing, to better understand the stage and progression of infection.

Short name

IgM HCV Antibody

Frequently asked questions

When might I need this test?
This test is typically recommended if you have risk factors for Hepatitis C, such as exposure to contaminated blood or needles, or if you have unexplained liver issues. Your doctor may also suggest it if you’re part of a screening program for Hepatitis C.
What does a positive result mean?
A positive IgM HCV test indicates that your body is producing antibodies against Hepatitis C, which may mean you’ve been recently infected. However, it doesn’t confirm the exact timing or duration of infection. Further testing, like viral load or IgG HCV antibodies, is needed to determine the stage and treatment options.
Can I get this test at home?
No, this test requires a blood sample collected by a healthcare professional in a clinical setting. Home testing kits for Hepatitis C antibodies are available but typically measure IgG antibodies rather than IgM.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy