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Test Code Billings Clinic: 4493 Phosphorus, Dialysis, Plasma or Serum

Important Note

Billings Clinic Dialysis Patients Only

Performing Laboratory

Billings Clinic Laboratory: Chemistry

Useful For

Phosphate levels may be used in the diagnosis and management of a variety of disorders including bone, parathyroid and renal disease.

Methodology

Phosphomolybdate UV/Bichromatic Endpoint

Specimen Requirements

Submit only 1 of the following specimens:

Serum or plasma should be physically separated from cells as soon as possible with a maximum limit of two hours from the time of collection.

 

Plasma

  • Draw blood in a green-top (lithium heparin) tube(s).
  • Spin down and send 1.0 mL of heparinized plasma frozen.

 

Serum

  • Draw blood in a plain, red-top tube(s) or a serum gel tube(s).
  • Spin down and send 1.0 mL of serum frozen

Storage/Stability

Specimen Type Temperature Time
Serum, Plasma Refrigerated 2 days
  Frozen (preferred) 6 months

Reject Due To

  • Gross hemolysis
  • Gross lipemia

Reference Values

2.5 - 4.9 mg/dL

Day(s) Test Set Up

Daily

Test Classification and CPT Coding

84100 - Phosphorus

LOINC Code Information

Reporting Name LOINC Code
Phosphorus 2777-1