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Quest Diagnostics

Phosphate, 24-Hour Urine with Creatinine

Quest Diagnostics

Sample type: Urine

Requires fasting: No

Sample collection required at Quest Diagnostics location

Details

Phosphate, 24-Hour Urine with Creatinine - Phosphorus is present in many foods, with a mean intake of approximately 1500 mg per day for adult males and about 1000 mg per day for adult females. Absorbed phosphate, under the influence of parathyroid hormone, is readily excreted in the kidney. Measurement of urinary phosphorus generally reflects dietary intake; hence, day-to-day excretion may show considerable variation.

  • Creatinine, 24-Hour Urine
  • Phosphate, 24 Hour Urine
  • Phosphate/Creatinine Ratio

Estimated days for results: Results should be available in 2 - 5 business days after the sample is collected

Details
Phosphate, 24-Hour Urine with Creatinine - Phosphorus is present in many foods, with a mean intake of approximately 1500 mg per day for adult males and about 1000 mg per day for adult females. Absorbed phosphate, under the influence of parathyroid hormone, is readily excreted in the kidney. Measurement of urinary phosphorus generally reflects dietary intake; hence, day-to-day excretion may show considerable variation.

What type of sample is required for this test?
10 mL urine aliquot from a well-mixed, 24-hour urine collection

Test Resources
For more information, please consult your healthcare provider.

2–5 business days

  • Urinalysis
  • Electrolytes

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
 Specimen
  • Preferred Specimen(s): 10 mL urine aliquot from a well-mixed, 24-hour urine collection 
  • Alternative: NA 
  • Minimum Volume: 2 mL 
  • Collection Instructions: NA 
 Storage and shipping instructions
  • Transport Container: Preservative-free urine collection container 
  • Transport Temperature: Refrigerated (Cold Packs) 
  • Specimen Stability: 
    • Room temperature: 48 hours 
    • 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

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