Skip to content

Total Bilirubin (Serum)

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

This test measures the total amount of bilirubin in your blood. Bilirubin is a yellow pigment produced when red blood cells break down, and it helps the liver process waste products.

Quick summary

["Bilirubin helps identify liver function and bile flow issues."]

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

Key facts at a glance

LOINC
53611-0
Short code
T gondii CSF Ql IF
Synonyms
T gondii CSF Ql IF
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
if
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why This Test Matters

Your doctor may order this test to check for liver problems, such as hepatitis, cirrhosis, or blockages in the bile ducts. High levels can also signal conditions like hemolytic anemia, where red blood cells break down faster than usual.

What to Expect During the Test

A small blood sample is taken from a vein, usually in your arm. You may feel a slight pinch, but it’s quick and painless. No special preparation is needed unless instructed otherwise.

Common Causes of Abnormal Results

Elevated bilirubin levels might be due to liver disease, gallbladder issues, or increased red blood cell destruction. Low levels are less common but could indicate liver dysfunction or other metabolic disorders.

How Results Are Interpreted

Results are compared to standard ranges for your age and health. Your doctor will discuss any deviations and may recommend follow-up tests if needed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Bilirubin is a key marker for liver and bile system health. High levels often signal conditions requiring medical attention, while low levels may warrant further investigation into liver function or metabolism.

Short name

Total Serum Bilirubin

Frequently asked questions

What causes high bilirubin levels?
High bilirubin can result from liver disease, bile duct blockages, or conditions like hemolytic anemia where red blood cells break down too quickly. Your doctor may also check for infections, genetic disorders, or other metabolic issues.
How long does it take to get results?
Results are typically available within 1 to 3 business days, depending on your lab’s processing time. Your doctor will contact you once they’re ready to discuss them.
Can diet affect bilirubin levels?
Dietary changes alone won’t alter bilirubin levels, but certain foods (like fatty foods) may affect bile flow indirectly. Avoid alcohol or medications that could impact liver function before testing if advised by your doctor.
  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