Creatinine, 24-Hour Urine
Quest Diagnostics
Sample type: Urine
Requires fasting: No
Sample collection required at Quest Diagnostics location
Details
Creatinine, 24-Hour Urine - This test measures the amount of creatinine expelled in the urine over a 24-hour period and is used to evaluate kidney function. This test helps determine how well the kidneys are able to filter small molecules like creatinine out of the blood. It is often used in conjunction with blood creatinine tests to calculate the creatinine clearance rate, which can provide more detailed information on kidney filtration efficiency. This is particularly useful in detecting renal dysfunction and monitoring known kidney disease or conditions affecting kidney performance.
- Creatinine, 24-Hour Urine
Estimated days for results: Results should be available in 2 - 5 business days after the sample is collected
2–5 business days
3-8 Years 0.10-0.80 g/24 h
9-12 Years 0.20-1.40 g/24 h
13-17 Years 0.40-1.90 g/24 h
>17 Years 0.50-2.15 g/24 h
Collection Options with Fullscript
Sample collection requires a test kit that can be picked up at a nearby Quest Diagnostics Patient Service Center.
Quest Diagnostics Patient Service Centers (PSC)
- Location: Visit a nearby Quest Diagnostics Patient Service Center.
- Cost: $10 sample collection fee (paid during lab order checkout).
- Scheduling: Schedule your appointment here. Appointments are recommended to reduce wait times. Walk-ins are accepted, but may experience delays. Aim to arrive 10 minutes before your appointment.
- Collection Instructions:
- Bring a valid ID.
- Bring your digital or printed requisition form, available in the Labs tab of your Fullscript account.
- Check-in: Scan the QR code from your confirmation email or follow kiosk instructions.
- More Info: Quest Diagnostics collection guide
- Preferred Specimen(s): 10 mL urine aliquot from a well-mixed, 24-hour collection - no preservative
- Alternative: NA
- Minimum Volume: 2 mL
- Collection Instructions: NA
- Transport Container: Preservative-free urine collection container
- Transport Temperature: Room Temperature
- Specimen Stability:
- Room temperature: 7 days
- Refrigerated: 7 days
- Frozen: 28 days
- Reject Criteria: NA
State restrictions:
Patient can't order this test if they are located in Hawaii, Puerto Rico, New Jersey, New York, or Rhode Island
