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Bilirubin and Protein, Qualitative

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

A qualitative test that checks whether bilirubin and protein are detectable in the submitted specimen; results are reported as positive or negative.

Quick summary

["This test checks for the presence of bilirubin and protein, which can help evaluate liver, bile duct, or kidney-related conditions when appropriate."]

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

Key facts at a glance

LOINC
77452-1
Short code
Bilirub Prt Ql
Synonyms
Bilirub Prt 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?

This qualitative test detects bilirubin, a yellow pigment made during the breakdown of red blood cells, and protein in a patient sample. The specimen and testing method are confirmed with your healthcare professional.

Why might I need this test?

The test may be used as part of an evaluation of symptoms involving the liver, bile ducts, or kidneys. It may also be included in routine urine or other body-fluid testing.

How is the test performed?

A laboratory professional applies a small amount of the specimen to testing material that changes visibly when bilirubin or protein is present. The result is generally reported as positive or negative, or detectable or not detectable.

How do I prepare for the test?

Preparation depends on the specimen ordered. If this is a urine test, follow the laboratory's collection instructions and avoid contaminating the sample with toilet paper, soap, or other cleaning products.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Qualitative Bilirubin and Protein Test

Frequently asked questions

What does a positive result mean?
It means bilirubin or protein was detected in the specimen. Your healthcare professional will interpret the finding in relation to the type of sample, your symptoms, and other test results.
Does a negative result rule out a liver or kidney problem?
No. A negative qualitative result only means the substance was not detected by this test, and it may not exclude every related condition.
Can medications, food, or other factors affect the results?
Yes. Some medications, supplements, pregnancy-related changes, and specimen contamination can affect bilirubin or protein measurements, so tell your clinician about relevant medications and supplements.
  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