Phosphorus

Test Code
PHOS


CPT Codes
84100

Preferred Specimen
GREEN Lithium Heparin Plasma


Minimum Volume
0.25 mL


Other Acceptable Specimens
SST Serum Separator, Red No Gel


Instructions
Separate from cells within 4 hours of collection


Transport Container
GREEN Lithium Heparin


Transport Temperature
Room Temperature


Specimen Stability
Room Temp: 3 Days; Refrigerated: 7 Days


Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Not separated from cells within 4 hours of collection, gross hemolysis


Methodology
Vitros 7600/3400

Reference Range
2.5-4.5 mg/dL; Critical : <1.0 or >8.9 mg/dL


Clinical Significance
Phosphorus, as phosphate, is distributed throughout the body. Causes of high serum phosphorus include dehydration, hypoparathyroidism, hypervitaminosis D, metastases to bone, sarcoidosis, pulmonary embolism, renal failure, and diabetes mellitus with ketosis. Low serum phosphorus is found in primary hyperparathyroidism and other causes of serum calcium elevation, sepsis, vitamin D deficiency, renal tubular disorders, chronic hemodialysis, vomiting, and occasionally with decreased dietary phosphate intake


Performed By
RFGH Laboratory

Performing Laboratory
RFGH Laboratory



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.