Urate (Uric Acid) and Creatinine, 24-Hour Urine
Measures urate and creatinine in urine collected for 24 hours. The results help assess uric acid excretion and account for differences in urine concentration.
["This test can help evaluate how much uric acid your body is excreating, especially when kidney function or uric acid handling needs assessment."]
Key facts at a glance
- LOINC
- 75642-9
- Short code
- Urate/Creat 24h Ur-sRto
- Synonyms
- Urate/Creat 24h Ur-sRto
- Category
- kidney
- Sample
- urine
- Container
- Sterile urine container
- Units
- N/A
- Ref low
- 3.5
- Ref high
- 7.2
- 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
What is this test?
This test measures uric acid, also called urate, and creatinine in all urine collected over a 24-hour period. Creatinine is used to help account for variation in urine concentration, so the two results may be interpreted together.
Why might I need this test?
A clinician may order it to evaluate uric acid excretion, investigate high or low urate levels, or assess uric acid handling when evaluating gout, kidney function, or treatment with uric acid-lowering medication.
How is the test performed?
You collect all urine into a special container for exactly 24 hours. The laboratory then measures the amount of urate and creatinine in the collected sample, and the results may be compared to determine the relative amount of urate being excreted.
How do I prepare for the test?
Follow the collection instructions provided by the laboratory, including the exact start and stop times. Continue normal daily activities and fluid intake unless your clinician gives different instructions, and return the container promptly as directed.
Reference range
NCBI: Uric Acid Male 3.5-7.2 mg/dL; Female 2.5-6.8 mg/dLN/A
No special preparation usually required. Stay well hydrated. Inform your healthcare provider of all medications and supplements you are taking.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
An elevated urate result may occur with increased purine breakdown, reduced kidney excretion, certain medications, or dietary influences. A low result may occur in some nutritional, metabolic, liver, or kidney-related conditions. The 24-hour collection and creatinine measurement help provide context, but results should be interpreted by a clinician along with symptoms, medications, and other laboratory tests.
Short name
24-hour urine urate and creatinine
Frequently asked questions
What is the difference between urate and uric acid?
Why is creatinine included in this urine test?
What happens if part of the urine collection is missed?
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 17, 2026. · Read our editorial policy