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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.
Possible manitol interferant may cause discrepant results.
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
Test Classification and CPT Coding
84100
Performing Laboratory - Chemistry
| Minnesota | North Dakota | Wisconsin |
| Ada Hospital Lab | Fargo Hospital Lab | Ashland Clinic Lab |
| Deer River Hospital Lab | Mid Dakota Bismarck 9th Street | Hayward Clinic Lab |
| Ely Clinic Lab | South University Clinic Lab | Spooner Clinic Lab |
| Fosston Hospital Lab | St. Mary's Hospital-Superior | |
| Hibbing Clinic Lab | ||
| Holy Trinity Hospital Lab | ||
| International Falls Clinic Lab | ||
| Moose Lake Hospital Lab | ||
| Northern Pines Lab | ||
| Park Rapids Clinic Lab | ||
| Sandstone Hospital Lab | ||
| SMDC Clinical Lab | ||
| St. Joseph's - Brainerd Clinic Lab | ||
| St. Joseph's Medical Center Lab | ||
| St. Mary's - Detroit Lakes Hospital | ||
| Virginia Hospital Lab |
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