Home
HelpTest Code LAB3 Phosphorus, Plasma or Serum
Additional Codes
| Test Name in EPIC | EPIC Test Code | Mnemonic |
|---|---|---|
| PHOSPHORUS | LAB3 | PHOS |
Useful For/Utility
Useful in the diagnosis and management of a variety of disorders including bone, parathyroid, and kidney disease.
Methodology
Phosphomolybdate
Clinical Information
The majority of the body phosphorus (80% to 85%) is present in the bones as hydroxyapatite. The remainder of the phosphate is present as inorganic phosphorus and phosphate esters. Calcium and phosphorus in serum usually exhibit a reciprocal relationship. Increased serum phosphorus may occur in hypervitaminosis D, hypoparathyroidism, and renal failure. Reduced serum phosphorus levels are seen in rickets (Vitamin D deficiency), hyperparathyroidism, and Fanconi’s syndrome.
Specimen Requirements
Submit only 1 of the following specimens:
Preferred:
Specimen Type: Plasma
Container/Tube: Light-green top (lithium heparin gel)
Specimen Volume: 1 mL
Specimen Minimum Volume: 0.5 mL
Collection Instructions:
1. Spin down and separate plasma from cells within 2 hours of draw.
2. If plunger filters are used, immediate removal of plasma is indicated unless an air gap can be created between the device and specimen.
Additional Information:
1. Avoid repeated freeze/thaw cycles.
2. If extreme lipemia-use ultracentrifuged specimen.
3. Label specimen appropriately (plasma).
Alternate:
Specimen Type: Serum
Container/Tube: Serum gel
Specimen Volume: 1 mL
Specimen Minimum Volume: 0.5 mL
Collection Instructions:
1. Spin down and separate serum from cells within 2 hours of draw.
2. If plunger filters are used, immediate removal of serum is indicated unless an air gap can be created between the device and specimen.
Additional Information:
1. Avoid repeated freeze/thaw cycles.
2. If extreme lipemia-use ultracentrifuged specimen.
3. Label specimen appropriately (serum).
Specimen Transport Temperature
Refrigerate 4 days/Ambient 1 day/Frozen 1 year
Day(s) Test Set Up
Monday through Sunday
Performing Laboratory
Chemistry-
St. Joseph's - Brainerd Clinic Lab, St. Joseph's Medical Center Lab
Ashland Clinic Lab, Deer River Hospital Lab, Ely Clinic Lab, Hayward Clinic Lab, Hibbing Clinic Lab, International Falls Clinic Lab,Moose Lake Hospital Lab, Northern Pines Lab, Sandstone Hosptail Lab, SMDC Clinical Lab, Spooner Clinic Lab, St. Mary's Hospital - Superior Lab, Virginia Hospital Lab
Ada Hospital Lab, Fargo Hospital Lab, Park Rapids Clinic Lab, South University Clinic Lab
Test Classification and CPT Coding
84100
Reference Values
0-14 days: 5.6-10.5 mg/dL
15 days-1 year: 4.8-8.4 mg/dL
1-4 years: 4.3-6.8 mg/dL
5-12 years: 4.1-5.9 mg/dL
13-15 years: 3.2-6.2 mg/dL
16-18 years: 2.9-5.0 mg/dL
Adult: 2.5-4.6 mg/dL