PHOSPHORUS, URINE, RANDOM

Message

Note: There is a diurnal variation in urine phosphate excretion with the highest output occuring in the afternoon.

Test Code

RPO4

Alias/See Also

PO4+

CPT Codes
84105

Preferred Specimen

Sterile Container

Patient Preparation
Collected by patient

Minimum Volume

1 mL (5 mL optimal)

Transport Container

URINE Contianer

Transport Temperature

Room temperature

Specimen Stability

2-8°C up to 24 hours

Methodology
Phosphomalybdate, UV

Setup Schedule

DAILY, as received

Report Available

STAT: <60 minutes
Routine: <4 hours

Reference Range

Reference ranges have not been established for random samples

Clinical Significance

Absorbed phosphate, under the influence of parathyroid hormone is excreted in the kidney. Measurement of urinary phosphorus reflects kidney function as well as parathyroid function.

Performing Laboratory
Mount Sinai Hospital

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.