Urine Albumin Test
A urine albumin test is a simple, painless screening test that checks a sample of your urine for albumin, a protein that normally stays in your blood. When albumin appears in your urine, it can be an early warning sign of kidney damage, which makes this test an important tool for finding kidney problems early, before they become serious.
{"The test uses a dipstick to check if albumin, a protein, is present in your urine","Normal urine should contain little to no albumin","Positive results may indicate kidney damage or disease","The test is quick, painless, and often part of routine checkups","Further testing may be needed if albumin is detected"}
Key facts at a glance
- LOINC
- 50949-7
- Short code
- ALB/UC
- Synonyms
- Albumin Ur Ql Strip
- Category
- chemistry
- Sample
- urine
- Container
- Sterile urine container (clean-catch or random specimen)
- Units
- not specified
- Ref low
- 3.5
- Ref high
- 5
- Critical range
- 1.5 not specified – —
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- test-strip
- CPT
- 81001
- SNOMED
- 27171000
- Specimen volume
- 10-50 mL preferred
- Stability
- Test within 2 hours of collection. If delay >2 hours, refrigerate at 2-8°C for up to 24 hours. Do not freeze.
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 1–24 hours
- Order
- routine
What is this test?
The urine albumin test, also known as a urine protein test or microalbuminuria test, is a diagnostic procedure that uses a special chemical strip (dipstick) to detect the presence of albumin protein in your urine. Albumin is normally found in the blood and helps transport substances throughout the body. When kidneys are healthy, they filter waste from the blood while keeping important proteins like albumin in the bloodstream. If the kidneys are damaged, albumin can leak into the urine, which is why detecting it is important for identifying kidney problems early.
How is the test performed?
During the test, you will be provided with a clean collection container. You will need to collect a small sample of urine, typically mid-stream, meaning you start urinating and then collect the sample in the container. The urine sample is then dipped into a chemically treated strip or the strip is placed in the urine sample. The strip contains pads that change color if albumin is present. The healthcare provider will compare the color change to a standard chart to determine the result. The test is quick, usually taking only a few minutes, and is completely painless.
Why is this test important?
This test is crucial for detecting kidney damage early, especially in people with risk factors such as diabetes, high blood pressure, or a family history of kidney disease. Early detection of albumin in urine (called microalbuminuria) allows healthcare providers to start treatment before significant kidney damage occurs. The test is also used to monitor kidney function in people already diagnosed with kidney disease or conditions that affect the kidneys. Regular testing can help prevent or slow the progression of chronic kidney disease.
How to prepare for the test?
Generally, no special preparation is required for a basic urine albumin dipstick test. You can eat and drink normally before the test. However, it is important to inform your healthcare provider about any medications or supplements you are taking, as certain drugs can affect test results. For the most accurate results, you should also avoid strenuous exercise immediately before the test, as intense physical activity can temporarily increase protein levels in urine. Your healthcare provider will give you specific instructions if any preparation is needed.
Reference range
Adult: 3.5-5.0 g/dLnot specified
No fasting or special preparation required; midstream clean-catch random urine preferred
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
The presence of albumin in urine (proteinuria) is a significant clinical finding that can indicate several health conditions. The most common causes include diabetic nephropathy (kidney damage from diabetes), hypertension-related kidney damage, glomerulonephritis (inflammation of kidney filtering units), and urinary tract infections. The amount of albumin detected helps determine the severity of kidney involvement. Small amounts (microalbuminuria) may indicate early kidney damage, while larger amounts suggest more advanced kidney disease. This test is particularly valuable for screening at-risk populations and monitoring disease progression or treatment effectiveness.
Frequently asked questions
What does a positive result mean?
Is the test painful?
How long does it take to get results?
Can I do this test at home?
What happens if my test shows albumin in urine?
Sources
- 1
- 2Mayo Clinic - UrinalysisSource
- 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 17, 2026. · Read our editorial policy