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Albumin to Creatinine Ratio (Serum)

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

This test compares the levels of albumin (a protein) and creatinine (a waste product from muscle breakdown) in your blood to help assess kidney function and protein loss.

Quick summary

["A ratio helps detect kidney issues or protein leakage that may not be caught by individual tests alone."]

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

Key facts at a glance

LOINC
24717-1
Short code
Deprecated XR Ileal conduit Loopogram
Synonyms
Deprecated XR Ileal conduit Loopogram
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
xr
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

Your doctor may order this test if you have symptoms like swelling, frequent urination, or unexplained weight changes. It’s also used to monitor kidney disease, protein loss (such as nephrotic syndrome), or conditions like diabetes that affect kidney function.

How the Test Works

A blood sample is taken, and the albumin and creatinine levels are measured separately. The ratio is then calculated to provide a single value for interpretation.

What It Means

A higher ratio may indicate kidney problems, such as albuminuria (protein in urine), while a lower ratio could suggest malnutrition or liver disease. Your results will be discussed with your healthcare provider.

Common Conditions Monitored

This test is often used alongside other kidney function tests to diagnose or track conditions like chronic kidney disease, diabetic nephropathy, or conditions causing protein loss in urine.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Albumin:Creatinine Ratio

Frequently asked questions

How long does it take to get results?
Results are typically available within 1 to 3 business days, depending on lab processing times and your healthcare provider’s workflow.
What does a high or low ratio mean?
A high ratio may signal kidney problems or protein loss, while a low ratio could indicate malnutrition, liver disease, or other health issues. Your doctor will interpret results in the context of your medical history and symptoms.
Can I eat or drink anything before this test?
No special preparation is needed for this blood test, but follow any general fasting instructions your doctor provides if this is part of a larger panel.
  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