Days Set Up
Daily
Analytic Time

8 hours

Soft Order Code
PHOSU/PHOSQ

Test Updated:

Synonyms

PHOSQ
PHOSQ
PHOSPHORUS URINE 24 HRS
PHOSPHORUS URINE RANDOM
PHOSU
PHOSPHORUS URINE 24 HOUR

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Test Overview

Test Methodology

Phosphomolybdate

Test Usage

Renal function test, evaluate calcium/phosphorus balance. Normal phosphate excretion reflects the dietary intake of phosphate. The excretion varies with growth, dietary intake, renal function, muscle mass and hormonal activity. Urinary phosphate excretion will be decreased in hyperthyroidism.

Reference Range

400 - 1200 mg/TV (24 hour collection). Random urine collections vary with dietary intake and are dependent on diurnal variation, and are reported in units of mg/dL, for which reference values are not established.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Collection Offsite

Collect 24 hour urine specimen with no preservative. Aliquot 5 mL into a plastic urine container and refrigerate. Record total 24 hour urine volume and collection dates/times on request form. Random urine also acceptable.

Normal Volume
5 mL aliquot of 24 hour urine collection or 2 mL aliquot of random urine collection.
Minimum Volume
2 mL aliquot of 24 hour urine collection or 1 mL aliquot of random urine collection.

Billing Information

CPT Code
84105
Pro Fee Code
 
LOINC
PHOSU 2778-9 PHOSQ 2779-7

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.