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Urinalysis with Microscopic Examination of Sediment (Qualitative)

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

This test examines your urine under a microscope to check for cells, bacteria, crystals, or other substances that may indicate infection, kidney issues, or other health problems.

Quick summary

["Microscopic urine analysis helps spot hidden problems in your urinary system."]

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

Key facts at a glance

LOINC
80431-0
Short code
EMPLOYERCITY
Synonyms
—
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 the Microscope Find?

The test looks for red blood cells (which could signal bleeding or kidney problems), white blood cells (often linked to infections), bacteria (possible urinary tract infection), or crystals (sometimes linked to kidney stones).

Why Might You Need This Test?

Your doctor may order this test if you have symptoms like pain during urination, frequent urination, blood in urine, or if tests like protein or glucose screening suggest an underlying issue.

How Is the Test Done?

A small urine sample is collected, and a drop is placed on a microscope slide. A technician examines it under high magnification to identify any abnormal substances.

What Are Common Findings?

Common findings include the presence of bacteria (indicating infection), red blood cells (possible kidney or bladder issues), or crystals (which may require further evaluation for stones).

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Urinalysis Microscopy

Frequently asked questions

What does a positive result mean?
A positive result means the presence of abnormal substances in your urine, which may require further testing or medical evaluation to determine the cause.
How often should I get this test?
Your doctor will determine the frequency based on your symptoms, medical history, and specific health needs. Regular check-ups may include this test if you have ongoing urinary issues.
Can I prepare for this test?
No special preparation is needed. However, avoid using strong perfumes, deodorants, or certain medications that might affect urine color before testing if instructed by your doctor.
  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