Creat5hurmrate
A test that measures the amount of creatinine in your urine collected over a 5-hour period to help evaluate how well your kidneys are working.
{"Measures creatinine (a waste product) excreted in urine over 5 hours","Helps assess kidney function and filtering ability","Requires collecting all urine produced during the 5-hour collection period","Results are often compared with blood creatinine for comprehensive kidney assessment","Abnormal results may indicate kidney disease or other conditions"}
Key facts at a glance
- LOINC
- 93733-4
- Short code
- UCreat5h
- Synonyms
- Creat 5h Ur-mRate
- Category
- kidney
- Sample
- urine
- Container
- Urine collection container (graduated preferred for volume measurement)
- Units
- not specified
- Ref low
- 200
- Ref high
- 400
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- ≥ 0 years
- Method
- Enzymatic or Jaffe kinetic colorimetric method
- CPT
- 82520
- SNOMED
- 389076003
- Specimen volume
- Complete 5-hour collection, typically 50-500 mL depending on urine output
- Stability
- Room temperature: 24 hours; Refrigerated (2-8°C): 72 hours; Frozen (-20°C): 30 days
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 24–72 hours
- Order
- routine
What is this test?
The 5-hour urine creatinine test measures the amount of creatinine in your urine over a specific 5-hour period. Creatinine is a waste product produced by your muscles as they break down a compound called creatine. Your kidneys normally filter creatinine from your blood and excrete it in urine. By measuring how much creatinine your kidneys excrete over time, healthcare providers can assess how well your kidneys are functioning.
How is the sample collected?
You will be given a special container to collect all urine during a 5-hour period. It's important to collect every drop of urine during this time for accurate results. The test usually begins in the morning after your first urination. You will need to note the exact start time and collect all subsequent urine until the 5-hour period ends. The collected sample is then sent to a laboratory for analysis.
What do the results mean?
Normal creatinine excretion varies based on factors like age, sex, muscle mass, and diet. Your healthcare provider will interpret your results in context of your overall health and other test results. This test is often used together with blood creatinine tests to get a complete picture of kidney function.
Reference range
200-400 mg/5 h (approximate; varies by sex/muscle mass)not specified
Accurate 5-hour timed urine collection required; discard initial void then collect all urine for 5 hours; no fasting needed
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
Do I need to fast before this test?
What can affect my test results?
Is the test painful?
How long does it take to get results?
What happens if my results are abnormal?
Sources
- 1
- 2
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