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Microalbuminuria (Microalbumin in Urine)

Published: August 9, 2026Updated: August 17, 2026

This test measures tiny amounts of albumin, a protein, in your urine to check for early kidney damage or diabetes-related kidney issues.

Quick summary

["Detects early kidney problems often linked to diabetes or high blood pressure."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
51382-0
Short code
RBC #/area Snv Micro
Synonyms
RBC #/area Snv Micro
Category
chemistry
Sample
fluid
Container
Sterile tube
Units
N/A
Ref low
4.2
Ref high
5.9
Critical range
2 N/A – 7 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
microscopy-light
CPT
85041
SNOMED
900000000000003001
Specimen volume
2-5 mL
Stability
Room temperature: 2h, Refrigerated: 24h
Hemolysis max
300
TAT
4–24 hours
Order
routine

Why It’s Done

Your doctor may recommend this test if you have diabetes, high blood pressure, or other risk factors for kidney problems. It helps track how well your kidneys are working over time, especially in people with diabetes.

What to Expect

You’ll likely provide a small urine sample in the morning. The test checks for small protein levels that may appear before more serious kidney damage occurs.

What the Results Mean

Higher-than-normal levels may signal early kidney issues, but results alone don’t diagnose kidney disease. Your doctor will consider your overall health and other tests.

Common Causes

Microalbuminuria can occur with diabetes, high blood pressure, or kidney disease. It may also appear in people with certain infections or other health conditions.

Reference range

Adult males: 4.2-5.9; Females: 3.8-5.1 x 10^12/LN/A

Specimen: fluid

No special preparation required. Stay well hydrated.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Microalbuminuria is a key marker for kidney strain, especially in diabetes. Early detection allows for timely interventions like blood pressure control or diabetes management to slow progression.

Short name

Microalbumin Test

Frequently asked questions

What does a microalbumin test measure?
It measures tiny amounts of albumin protein in your urine, which can indicate early kidney damage or diabetes-related kidney complications.
How often should I get this test?
Your doctor will determine frequency based on your health status—typically yearly for people with diabetes or kidney risk factors.
Can I eat or drink before this test?
You may need to follow specific instructions, such as avoiding certain foods or drinks for 24 hours before testing, but your lab staff will guide you.
  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 17, 2026. · Read our editorial policy