PHOSPHORUS

Test Code

LAB113

Alias/See Also

PO4

CPT Codes
84100

Preferred Specimen

Green Top/Gel LiHep

Minimum Volume

2.0 mL

Other Acceptable Specimens

Pediatric Green

Transport Container

PST

Transport Temperature

Refrigerate

Methodology
Molybdate-UV

Setup Schedule

Set Up:Daily Report Available:Routine 4 hr/ STAT 1hr

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. More than 80% of the bodys phosphorus is present in the bones as calcium phosphate. The remainder is involved in the intermediary metabolism of carbohydrates and is a component of such physiologically important substances as phospholipids, nucleic acids, and ATP.1 Phosphorus is present in blood as inorganic and organic phosphates, nearly all the latter residing in the erythrocytes. The small amount of extracellular organic phosphate exists almost exclusively in the form of phospholipid; the remainder of serum phosphorus is present as inorganic phosphate.

Performing Laboratory
GBMC Chemistry

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.