Skip to content

Bilirubin, Whole Blood — Mass Concentration

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

This test measures the amount of bilirubin in a blood sample. Bilirubin is a yellow pigment produced during the breakdown of red blood cells.

Quick summary

["The result helps assess how the body is breaking down red blood cells and processing bilirubin through the liver."]

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

Key facts at a glance

LOINC
59827-6
Short code
Bilirub BldA-mCnc
Synonyms
Bilirub BldA-mCnc
Category
liver
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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

What is this test?

A bilirubin blood test measures the concentration of bilirubin, a yellow pigment formed when red blood cells are broken down. Bilirubin is processed by the liver and then removed from the body.

Why might I need this test?

This test may be ordered to evaluate jaundice, changes in liver function, or suspected increased red blood cell breakdown. It may also be used when monitoring certain liver or blood conditions.

How is the test performed?

A blood sample is collected, usually by a venous blood draw, and the laboratory measures bilirubin in the sample. The test method may vary by laboratory, and the result is usually reported as a concentration.

How do I prepare for the test?

Fasting is usually not required for a bilirubin test, but follow any instructions provided by your healthcare professional or laboratory. Tell the laboratory if you are pregnant or taking medicines that may affect the liver or blood.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Bilirubin (Blood)

Frequently asked questions

What does a high bilirubin level mean?
It may indicate increased red blood cell breakdown, reduced liver processing of bilirubin, or a blockage in bile drainage. Other tests are usually needed to determine the cause.
Is fasting required for this test?
Usually not. Follow the specific preparation instructions given by your healthcare professional or laboratory.
Does bilirubin testing diagnose a specific condition?
No. Bilirubin is one part of a broader evaluation and is interpreted together with symptoms, medical history, and other laboratory results.
  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