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Urinalysis (Examination of Urine)

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

A urine test checks for general health, infections, kidney function, and other conditions by analyzing your urine.

Quick summary

["Urine tests help detect problems like infections, kidney issues, or diabetes early."]

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

Key facts at a glance

LOINC
11870-3
Short code
Exam level.US
Synonyms
Exam level.US
Category
chemistry
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 Does a Urine Test Measure?

This test examines urine for physical properties (color, clarity, odor) and checks for substances like glucose, protein, blood, or bacteria. It may also measure pH levels, specific gravity (concentration), and presence of ketones or crystals.

Common Uses of Urine Tests

Urine tests are often used to screen for urinary tract infections, kidney disease, diabetes, liver problems, or drug use. They can also monitor chronic conditions like diabetes or kidney disease.

When Might You Need a Urine Test?

You may need a urine test if you have symptoms like frequent urination, pain while urinating, unusual urine color, or if your doctor suspects an infection, kidney issue, or metabolic disorder.

How Is a Urine Test Performed?

You’ll typically provide a midstream clean-catch urine sample or a urine sample collected in a container. Some tests require a 24-hour urine collection for specific measurements.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Urine tests play a critical role in diagnosing and managing various health conditions by providing early detection of abnormalities in kidney function, metabolic processes, or infections.

Short name

Urine Exam

Frequently asked questions

Why do I need to fast before this test?
Fasting may be required for certain urine tests to ensure accurate results, especially if measuring substances like glucose or ketones. Your doctor will let you know if fasting is needed.
What should I do to prepare for a urine test?
Follow your doctor’s instructions carefully. Avoid certain foods, medications, or supplements that could interfere with the test results. Drink plenty of water unless advised otherwise.
Will the urine test hurt?
No, a urine test usually doesn’t cause pain. You may feel mild discomfort during urination if using a clean-catch method, but it’s generally quick and not painful.
  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