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Protein in urine (qualitative or semi-quantitative screening)

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

This test checks for the presence of extra protein in your urine, which may indicate kidney problems or other health conditions.

Quick summary

["Early detection of kidney issues or other potential health risks through urine protein screening."]

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

Key facts at a glance

LOINC
48627-4
Short code
M Protein Ur-aCnc
Synonyms
M Protein Ur-aCnc
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 Matters

Your urine may contain small amounts of protein normally, but higher levels can signal problems like kidney disease, diabetes, or infections. This test helps doctors monitor your health and guide treatment if needed.

What to Expect Before the Test

No special preparation is usually required. You may be asked to collect a small urine sample in a clean container, often at home or during a doctor’s visit. Follow your healthcare provider’s instructions carefully.

How the Test Works

The test may involve a dipstick or other method to detect protein in your urine. Results are often reported as positive, negative, or borderline, rather than specific numbers.

Possible Results and Next Steps

A positive result means protein is present in your urine. This could prompt further testing, such as a 24-hour urine collection or kidney function tests, to determine the cause. Follow-up may include lifestyle changes, medication, or referrals to specialists.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Proteinuria screening

Frequently asked questions

What causes protein in urine?
Protein in urine can result from kidney problems (e.g., glomerulonephritis), infections, heavy exercise, pregnancy, or certain medications. Stress or dehydration may also temporarily increase protein levels.
Is protein in urine always serious?
Not always. Mild proteinuria may be temporary and harmless, but persistent or high levels warrant medical evaluation to rule out underlying conditions.
Can I prevent proteinuria?
While some causes are beyond control, managing conditions like diabetes or high blood pressure, staying hydrated, and avoiding excessive salt may help reduce risk. Always discuss results with 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