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Phosphorus, Plasma, Serum, or Urine
Test Code910
CPT Codes
84100-Plasma or serum (if appropriate); 84105-Urine (if appropriate)
Preferred Specimen
Submit only 1 of the following specimens:
Plasma
Container/Tube: Green-top (heparin) tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of plasma
Collection Instructions: Avoid hemolysis.
Note: 1. Indicate plasma. 2. Label specimen appropriately (plasma).
Serum
Container/Tube: Serum gel tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5) of serum
Collection Instructions: Avoid hemolysis.
Note: 1. Indicate serum. 2. Label specimen appropriately (serum).
Urine
Container/Tube: Plastic urine container(s) with no metal cap(s) or glued insert(s)
Specimen Volume: 25 mL from a 24-hour urine collection
Collection Instructions: Add 20 mL of 6N HCl at start of collection. If 24-hour volume is markedly decreased (<300 mL/24 hours), indicate exact volume of 6N HCl added. If preservatives are not used during 24-hour urine collection, 6N HCl may be added before analysis. Acidify the sample to below pH 3.0 before analysis
Note: 1. 24-Hour volume is required. 2. Follow instructions in Urine Collection in Special Instructions. 3. Indicate urine. 4. Label specimen appropriately (urine).
Plasma
Container/Tube: Green-top (heparin) tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of plasma
Collection Instructions: Avoid hemolysis.
Note: 1. Indicate plasma. 2. Label specimen appropriately (plasma).
Serum
Container/Tube: Serum gel tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5) of serum
Collection Instructions: Avoid hemolysis.
Note: 1. Indicate serum. 2. Label specimen appropriately (serum).
Urine
Container/Tube: Plastic urine container(s) with no metal cap(s) or glued insert(s)
Specimen Volume: 25 mL from a 24-hour urine collection
Collection Instructions: Add 20 mL of 6N HCl at start of collection. If 24-hour volume is markedly decreased (<300 mL/24 hours), indicate exact volume of 6N HCl added. If preservatives are not used during 24-hour urine collection, 6N HCl may be added before analysis. Acidify the sample to below pH 3.0 before analysis
Note: 1. 24-Hour volume is required. 2. Follow instructions in Urine Collection in Special Instructions. 3. Indicate urine. 4. Label specimen appropriately (urine).
Minimum Volume
Pediatric volume: 0.2 mL
Instructions
Urine Collection
Transport Temperature
Refrigerate
Methodology
Phosphomolybdate/Ultraviolet
Setup Schedule
Monday through Sunday
Reference Range
PLASMA OR SERUM
1-30 days: 3.9-7.7 mg/dL
31 days-3 years: 3.1-6.6 mg/dL
>3-12 years: 3.0-5.7 mg/dL
>12 years: 2.5-4.9 mg/dL
Critical value (automatic call-back): <1.0 mg/dL
URINE
0.4-1.3 g/24 hours
1-30 days: 3.9-7.7 mg/dL
31 days-3 years: 3.1-6.6 mg/dL
>3-12 years: 3.0-5.7 mg/dL
>12 years: 2.5-4.9 mg/dL
Critical value (automatic call-back): <1.0 mg/dL
URINE
0.4-1.3 g/24 hours
Performed By
CoxHealth
