A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

Phosphorus

Test Code
PHOS


Alias/See Also
Phosphate


CPT Codes
84100

Preferred Specimen

Serum (gold top) tube



Minimum Volume
0.5 mL


Other Acceptable Specimens
Lithium Heparin Plasma (green top) tube


Instructions

This test is for Phosphorus measurement on Plasma or Serum.  For Phosphorus measurement on Urine, order URPHOS.  For Phosphorus measurement on Body Fluids, order MISP.



Transport Container

Serum (gold top) tube or Lithium Heparin Plasma (green top) tube



Transport Temperature
Room Temperature or Refrigeration


Specimen Stability
Room Temperature - 3 days; Refrigerated - 7 days


Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis, Quantity Not Sufficient, EDTA (purple top )contamination, IV contamination


Methodology
Colorimetric

Setup Schedule

24 hours/day, 7 days/week



Report Available
Immediately upon completion of test resulting in Laboratory Information Systems.


Reference Range

Birth - 1 Month: 3.5 - 8.6 mg/dL
1 Month - 2 Years: 4.5 - 6.7 mg/dL
2 - 16 Years: 4.5 - 5.5 mg/dL
16 Years - Adult: 2.5 - 4.5 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.

This test is for Phosphorus measurement on Plasma or Serum.  For Phosphorus measurement on Urine, order URPHOS.  For Phosphorus measurement on Body Fluids, order MISP.





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.