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Conjugated Bilirubin, Fluid — Substance Concentration

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

Measures conjugated (direct) bilirubin in a body-fluid sample to help evaluate how the liver handles bilirubin.

Quick summary

["This test helps assess bilirubin processing, which may be affected by liver or bile-duct disease."]

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

Key facts at a glance

LOINC
39462-7
Short code
Bilirub Conj Fld-sCnc
Synonyms
Bilirub Conj Fld-sCnc
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 is this test?

This test measures conjugated bilirubin in a body-fluid sample. Conjugated bilirubin is the form that has been processed by the liver and is commonly called direct bilirubin.

Why might I need this test?

It may be ordered to help evaluate liver function or suspected bile-duct obstruction, particularly when bilirubin is also being measured in blood.

How is the test performed?

A laboratory analyzes the submitted fluid with an automated bilirubin method. The specimen source and collection container depend on the type of fluid being tested.

How do I prepare for the test?

Follow the specific collection instructions provided by your clinician or laboratory. Fasting may or may not be required depending on the specimen and the other tests ordered with it.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Conjugated Bilirubin

Frequently asked questions

Is conjugated bilirubin the same as direct bilirubin?
Conjugated bilirubin is often reported as direct bilirubin, although laboratory methods can differ slightly. It is the bilirubin form that has been processed by the liver.
Does an abnormal result confirm a specific liver disease?
No. An abnormal result can occur with several liver or bile-duct conditions and must be interpreted alongside other laboratory findings and your clinical history.
Can this test be performed on blood?
This test may be performed on blood or another body fluid, depending on the ordered laboratory test. The exact specimen should be confirmed with the healthcare provider or laboratory.
  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