Phosphate (as Phosphorus)

Supply #193262 Red/Gray SST 8.5mL

Test Code: 718

CPT Code(s): 84100

Methodology: Spectrophotometry (SP)

Clinical Significance: Serum phosphorus (Phosphate) levels alone are of limited diagnostic value and should be correlated with serum calcium levels. An increased phosphorus with decreased calcium suggests either hypoparathyroidism or renal disease. A decreased phosphorus and an increased calcium suggests hyperparathyroidism or sarcoidosis. When both calcium and phosphorus are decreased diagnostic considerations include malabsorption, vitamin D deficiency and renal tubular acidosis. Increased phosphorus and normal or increased calcium suggests Milk-alkali syndrome or hypervitaminosis D.

Alternative Name(s): Phosphorus; PO4; Inorganic Phosphorus

Collection Guide: 

Supply: 193262 Red/Gray SST 8.5mL

Preferred Specimen: Serum

Preferred Volume: 1mL

Transport Container: Serum Separator Tube (SST)

Transport Temperature: Room Temperature

Specimen Stability: Room Temperature: 7 days

Rejection Criteria: Plasma; Gross hemolysis

For additional supply or collection device information, please contact DLO's Customer Service at (800) 891-2917, option 2.

The CPT codes provided 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.