Phosphorus

Test Code

LAB1136

Alias/See Also

Phosphate; PO4

CPT Codes
84100

Preferred Specimen

4.5 ml (600 ul min) lithium heparin (green); alternate-SST (gold) or Red (no additive)

Minimum Volume

1 ml (200 ul minimum) plasma; alternate-serum

Other Acceptable Specimens

Gold SST

Instructions

Remove plasma or serum from cells within 2 hours after collection. After centrifugation, if not in gel barrier tube, pour off plasma or serum into an aliquot tube.

Transport Temperature

Room Temp

Specimen Stability

Separated from cells: 8 hours room temp, 7 days refrigerated

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Icteric: >40 mg/dL bilirubin, Hemolysis: >350 mg/dL hemoglobin, Lipemia: >900 mg/dL

Methodology
Timed Rate

Setup Schedule

Mon- Sun

Reference Range

2.6-4.5 mg/dL

Clinical Significance

Measurements of inorganic phosphorus are used in the diagnosis and treatment of various disorders including
parathyroid gland and kidney diseases, and vitamin D imbalance

Performing Laboratory
Piedmont Athens Regional

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.