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Bilirubin, Total (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 your liver process waste products.

Quick summary

["Your doctor may check bilirubin levels to diagnose or monitor liver disease, bile duct issues, or red blood cell disorders."]

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

Key facts at a glance

LOINC
69382-0
Short code
t(ABL1,BCR)b3a2/Control (IS) Bld/T
Synonyms
t(ABL1,BCR)b3a2/Control (IS) Bld/T
Category
coagulation
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
molgen
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms like jaundice (yellowing of the skin or eyes), dark urine, pale stools, or if they suspect liver problems, gallbladder issues, or conditions like hemolytic anemia. It can also be part of routine check-ups for certain conditions.

What to Expect Before the Test

No special preparation is usually needed. You may be asked to fast for 8–12 hours before the test if your lab requires it, but always follow your provider’s instructions. Bring any medications you’re taking, as some may affect results.

How the Test Is Done

A healthcare professional will draw blood from a vein in your arm using a small needle. You may feel a slight sting, but it’s usually over quickly. The blood is then sent to the lab for analysis.

What the Results Mean

Higher than normal levels may indicate liver disease, blockages in the bile ducts, or problems with red blood cell breakdown. Lower levels are less common but could suggest certain genetic conditions or liver dysfunction. Your results will be interpreted by your doctor based on your overall health.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Total Serum Bilirubin

Frequently asked questions

What causes bilirubin levels to rise?
Bilirubin levels can rise due to liver problems (like hepatitis or cirrhosis), blockages in the bile ducts, or when red blood cells break down faster than the liver can process it (e.g., in hemolytic anemia). Other factors, such as certain medications or infections, may also play a role.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on your lab’s processing time. Your doctor will contact you once they have the results, especially if they’re outside expected ranges.
Can I eat or drink before this test?
Follow your doctor’s instructions, but generally, fasting for 8–12 hours before the test is common for accurate results. If you’re unsure, ask your lab or provider about any specific dietary restrictions.
  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