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Serum/plasma mass concentration of bilirubin

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

This test measures the amount of bilirubin, a yellow pigment produced when your body breaks down old red blood cells. High levels may indicate liver or bile duct issues.

Quick summary

["Bilirubin helps diagnose liver problems and bile flow disorders."]

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

Key facts at a glance

LOINC
101678-1
Short code
Bld gp Ab Scn Bld NB Ql
Synonyms
Bld gp Ab Scn Bld NB Ql
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
blood-group-antibody-screen
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 Is This Test Done?

Your doctor may order this test to check for conditions like jaundice (yellowing of skin/hair), liver disease, gallbladder problems, or hemolytic anemia (rapid red blood cell destruction). It can also help monitor treatment for certain liver disorders.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample drawn from a vein in your arm. If you’re on blood thinners, let your doctor know before the test.

How the Results Are Interpreted

Results are compared to general reference ranges, but they can vary by lab. High levels may signal liver or bile duct problems, while very low levels could indicate liver disease or other conditions.

Common Conditions Linked to Bilirubin Levels

Elevated bilirubin is often linked to jaundice, liver inflammation (hepatitis), blockages in the bile ducts, or hemolysis. Low levels may suggest liver dysfunction or certain genetic disorders.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Bilirubin Level

Frequently asked questions

What causes bilirubin levels to rise?
Bilirubin can rise due to liver problems (like hepatitis), blocked bile ducts, rapid red blood cell breakdown (hemolysis), or inherited conditions (like Gilbert’s syndrome).
How long does it take to get results?
Results are typically available within 1–3 business days, depending on your lab. Follow-up with your doctor if you have concerns about your results.
Can diet affect bilirubin levels?
Dietary changes alone won’t alter bilirubin levels, but certain foods (like high-fiber or cruciferous vegetables) may interact with liver function indirectly. Always discuss any concerns with 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