Urinalysis with Microscopic Examination for Red Blood Cells (RBCs) and White Blood Cells (WBCs) in Urine
This test involves examining a urine sample under a microscope to check for the presence of red blood cells (RBCs) and white blood cells (WBCs). These cells can indicate different health conditions.
["Spotting cells in urine may signal infections, bleeding, or other health concerns."]
Key facts at a glance
- LOINC
- 91806-0
- Short code
- MuV RNA Upper resp Ql NAA+probe
- Synonyms
- MuV RNA Upper resp Ql NAA+probe
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- probe-amp-tar
- 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
Why This Test Is Done
Doctors may order this test to diagnose or monitor conditions such as urinary tract infections (UTIs), kidney problems, bladder issues, or other infections or inflammations in the urinary system. It can also help identify bleeding in the urinary tract or detect early signs of certain diseases.
What to Expect Before the Test
No special preparation is needed for this test. You may be asked to provide a clean-catch midstream urine sample, which involves urinating into a sterile container. If you’re unsure about the procedure, ask your healthcare provider.
What Happens During the Test
The urine sample is sent to a lab, where it is examined under a microscope. The lab technician looks for the presence of RBCs and WBCs. The results help determine if there are abnormal levels of these cells, which can indicate underlying health issues.
Possible Results and Their Meaning
If RBCs are present, it may suggest bleeding in the urinary tract, kidney disease, or other conditions. Elevated WBCs often point to infections, such as a UTI. The exact meaning depends on the context of your symptoms and medical history.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
High levels of RBCs in urine can indicate conditions like kidney stones, tumors, or trauma to the urinary tract. WBCs in urine are commonly associated with urinary tract infections, interstitial cystitis, or other inflammatory processes. Together, these findings help guide further medical evaluation and treatment.
Short name
Microscopic Urine Exam (RBC/WBC)
Frequently asked questions
What does it mean if I have red blood cells in my urine?
Will I need to take any medications if my test results show abnormal cells?
Can I drink water before this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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