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Urinalysis with microscopic examination for cellular components (e.g., red blood cells, white blood cells, casts)

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

This test checks for certain cells and substances in your urine under a microscope. It helps identify signs of infection, kidney issues, or other health problems.

Quick summary

["Microscopic urine exams can reveal hidden problems in your urinary system or overall health."]

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

Key facts at a glance

LOINC
17655-2
Short code
Deprecated S pneumB Ag Ur Ql IF
Synonyms
Deprecated S pneumB Ag Ur Ql IF
Category
coagulation
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
if
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

Why This Test Is Done

Your healthcare provider may order this test to investigate symptoms like frequent urination, blood in urine, pain during urination, or unexplained weight changes. It’s also used to monitor conditions like kidney disease, urinary tract infections, or diabetes.

What to Expect Before the Test

No special preparation is needed. You’ll provide a urine sample in the morning, often collected in a clean container. If you’re using medications that could affect urine color (e.g., certain antibiotics), let your provider know.

What Happens During the Test

A healthcare professional will collect your urine sample and examine it under a microscope. They’ll look for cells (like red or white blood cells), crystals, casts, or other substances that might indicate health concerns.

Possible Results and Their Meaning

Results may show normal urine (clear, no cells) or abnormal findings like extra red/white blood cells (possible infection), crystals (could indicate kidney stones), or casts (signs of kidney damage). Always discuss results with your provider.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Microscopic urine exam

Frequently asked questions

Is this test painful or uncomfortable?
No, this test is painless. You’ll simply provide a urine sample, similar to peeing into a cup. The microscopic exam itself doesn’t involve needles or invasive procedures.
How often should I get this test?
Frequency depends on your health status. Routine adults may not need it unless they have symptoms or risk factors (e.g., diabetes, kidney disease). Follow your provider’s recommendations.
Can I drink water before this test?
Yes, you can drink water as usual, but avoid excessive hydration that might dilute the sample. Avoid strong-colored liquids (like beets or berries) that could affect urine appearance.
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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