###1: 24-Hour Urine Uric Acid (Urate) Test
###3: This test measures the total amount of uric acid, also called urate, excreted in urine over a 24-hour period. It can help assess uric acid excretion when evaluating kidney stones and related conditions.
["###4: The result shows how much urate your body excreted in the urine over one day and must be interpreted with other clinical information."]
Key facts at a glance
- LOINC
- 42678-3
- Short code
- Urate 24h SatFr Ur
- Synonyms
- Urate 24h SatFr Ur
- Category
- chemistry
- Sample
- urine
- Container
- Sterile urine container
- Units
- N/A
- Ref low
- 20
- Ref high
- 400
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 82670
- 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
###5: What the test measures
###6: Urine urate reflects the amount of uric acid removed from the blood through the kidneys. A 24-hour collection combines all urine produced during the specified collection period.
###7: How the urine is collected
###8: You usually collect every drop of urine for 24 hours, beginning after your health care provider gives you instructions. The container and collection time should follow the laboratory's directions, and the total volume and collection period are important for accurate results.
###9: Why the test may be ordered
###10: This test may be used to investigate recurrent uric acid kidney stones, unexplained uric acid in the urine, or suspected abnormalities in purine metabolism. It may also help guide diet, medication, or other treatment decisions.
###11: Factors that can affect the result
###11: High or low readings can be influenced by kidney function, hydration, recent illness, dietary purines, and medicines such as allopurinol, febuxostat, probenecid, or thiazide diuretics. An incomplete collection can make the result inaccurate.
Reference range
Premenopausal: 20-400 pg/mL; Postmenopausal: <30 pg/mLN/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.
◆Associated findings1
Short name
###2: 24-hour urine urate
Frequently asked questions
###14: How do I collect a 24-hour urine sample correctly?
###16: Does eating meat or seafood before the test affect the result?
###18: What if the collection is missed or some urine is spilled?
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