Skip to content

Bilirubin, Qualitative

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

This test checks whether bilirubin is present in a specimen. It may be used to help evaluate bile duct obstruction, liver disease, or bilirubin handling disorders.

Quick summary

["A qualitative bilirubin result reports whether bilirubin is detected rather than providing a specific concentration."]

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

Key facts at a glance

LOINC
33870-7
Short code
Bilirub Spec Ql
Synonyms
Bilirub Spec Ql
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?

Bilirubin is a yellow pigment made when the body breaks down heme, the oxygen-carrying part of red blood cells. This qualitative test checks whether bilirubin is present in the specimen; the specimen type depends on the test ordered.

Why might I need this test?

Clinicians may use this test when evaluating jaundice, suspected liver or bile duct disease, or a possible problem with how the body processes and removes bilirubin.

How is the test performed?

A laboratory professional examines the specimen using a validated method to determine whether bilirubin is detectable. A qualitative result may be reported as negative, positive, or detected, depending on the laboratory method.

How do I prepare for the test?

Preparation varies with the specimen and the test ordered. Follow your clinician's or laboratory's instructions, and ask whether fasting or collection of a timed sample is required.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Qualitative bilirubin test

Frequently asked questions

Does this test measure how much bilirubin is present?
Usually, no. It is a qualitative test, so the main finding is whether bilirubin can be detected rather than an exact concentration.
What does a positive bilirubin result mean?
Bilirubin was detected in the specimen. This can occur in several conditions, so the result must be interpreted with other tests and your medical history.
Do I need to fast before this test?
Preparation depends on the specimen and the test ordered. Many bilirubin tests do not require fasting, but you should follow the specific instructions provided by your clinician 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