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Test Code Billings Clinic: 4300 Phosphorus, 24 Hour, Urine

Performing Laboratory

Billings Clinic Laboratory: Chemistry

Useful For

  • Evaluation of hypo- or hyper-phosphatemic states
  • Evaluation of patients with nephrolithiasis

Methodology

Phosphomolybdate UV/Bichromatic Endpoint

Specimen Requirements

  • 10 mL from a 24-hour urine collection in an acid-washed, detergent-free urine container.
  • 24-Hour volume is required on request form for processing.
  • Follow instruction in “Urine Collection” under Resources.

Storage/Stability

Specimen Type Temperature Time
Urine Refrigerated (acidified) 6 months
  Frozen NA
  • Sample must be acidified to pH < 3.0 using 6M Hydrochloric acid prior to testing

Reject Due To

  • Specimen received frozen

Reference Values

400.0 - 1300.0 mg/24 hours

Day(s) Test Set Up

Daily

Test Classification and CPT Coding

84105 - Phosphorus, urine

LOINC Code Information

Reporting Name LOINC Code
Phosphorus, Ur 24 Hr 2779-7
Urine Volume 28009-9