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Bilirubin Crystals, Urine — Qualitative

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

A urine microscopy test that looks for bilirubin crystals. It may be used alongside urine and liver tests to evaluate bile flow or liver function.

Quick summary

["Finding bilirubin crystals may suggest excess bilirubin in the urine, which can occur with liver disease or impaired bile flow."]

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

Key facts at a glance

LOINC
33236-1
Short code
Bilirub Cry Ur Ql Comp Assist
Synonyms
Bilirub Cry Ur Ql Comp Assist
Category
liver
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
computer-assisted
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What is this test?

This test examines urine for bilirubin crystals, which are tiny structures that can form when substantial amounts of bilirubin are present in the urine.

Why might I need this test?

Your clinician may order this test as part of a urinalysis or when evaluating abnormal liver tests, jaundice, or symptoms that may involve the liver or bile ducts.

How is the test performed?

A urine sample is examined under a microscope, and the lab compares the appearance of any crystals with known reference patterns to determine whether bilirubin crystals are present.

How do I prepare for the test?

Collect the urine as instructed by the laboratory, usually as a clean-catch midstream sample in a sterile container. Fasting is generally not required; follow the laboratory's instructions about sample timing and storage.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Urine bilirubin crystals

Frequently asked questions

What does a bilirubin crystal result mean?
It means bilirubin crystals were identified in the urine. This may support concern about excess bilirubin, impaired bile flow, or liver disease when combined with other results.
Does this test diagnose liver disease?
No. It is one part of a broader evaluation and is usually interpreted with liver blood tests, imaging, and other urine findings.
Do I need to fast before the test?
Fasting is usually not necessary. Follow your clinician's or laboratory's instructions, especially if the urine must be collected at a specific time or promptly refrigerated.
  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