24-Hour Urine Collection for Glucose and Creatinine Ratio (Quantitative)
This test measures the ratio of glucose and creatinine in your urine over 24 hours to assess how well your kidneys filter glucose. It helps detect conditions like diabetes or kidney-related glucose issues.
["Checks kidney function and glucose handling in urine over a full day."]
Key facts at a glance
- LOINC
- 99602-5
- Short code
- Glucose/Creat 24h Ur-sRto
- Synonyms
- Glucose/Creat 24h Ur-sRto
- Category
- glucose
- Sample
- urine
- Container
- Sterile urine container
- Units
- N/A
- Ref low
- 70
- Ref high
- 100
- Critical range
- 50 N/A – 400 N/A
- Fasting
- true
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 82947
- SNOMED
- 260395008
- 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 Is Done
Your doctor may order this test if they suspect you have diabetes, kidney problems, or other metabolic conditions affecting how your body processes glucose. It helps track how much glucose appears in your urine, which can indicate how well your kidneys are working to remove it.
What to Expect Before the Test
You’ll need to collect all urine for 24 hours, starting after midnight on one day and ending after midnight the next. Follow your doctor’s instructions carefully to ensure accurate results. You may need to wear a collection bag or use a container to store your urine samples.
How the Test Works
Your urine is tested for both glucose and creatinine levels. Creatinine is a waste product naturally present in your blood, and its levels help normalize glucose measurements. The ratio helps identify patterns in glucose excretion that may not be visible in a single blood test.
Possible Results and Interpretation
Results are typically expressed as a ratio rather than absolute values. High ratios may suggest diabetes or kidney issues, while normal ratios indicate typical glucose handling. Your doctor will interpret results based on your medical history and symptoms.
Reference range
Fasting: 70-100 mg/dLN/A
Fasting for 8-12 hours required. Water is permitted. Avoid chewing gum and smoking before the test.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Glucose-to-Creatinine Urine Ratio (24-hour)
Frequently asked questions
What Does This Test Measure?
How Might This Test Help My Doctor?
What Are Common Causes of Abnormal Results?
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