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22776 Phosphorus

Phosphorus
Test Code: PHOS
Synonyms/Keywords
PO4, Inorganic Phosphorus, Phos, Phosphate​
Useful For
Measurements of phosphorus (inorganic) are used in the diagnosis and treatment of various disorders, including:  parathyroid gland and kidney diseases, and vitamin D imbalance.​
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
​No Plasma​/Serum Lithium-heparin Plasma Separator (PST)​, Serum Separator Tube (SST) Lithium or Sodium-heparin Green Top (GTT), Red Top Tube (RTT) 1 mL​ 0.3 mL​ 0.4 mL whole blood​
Specimen Stability Information
Specimen Type Temperature Time
Plasma​/Serum ​ ​ Ambient​ 8 hours​
Refrigerate​ 2 days​
Frozen​ 2 months
Rejection Criteria
Hemolyzed samples​
Samples collected with Potassium oxalate/sodium fluoride and EDTA
Interference
Phosphorus may be falsely increased due to hemolysis.​
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
​Beaver Dam
​​Monday through Sunday
​​Less than 2 hours​
​Phosphomolybdate Complex Endpoint Assay/Beckman AU​
Chippewa Falls​
 ​​Monday through Friday ​Less than 2 hours​ ​Modified Phosphomolybdate Method/Siemens Dimension
Weston
 ​Monday through Sunday​ ​Less than 2 hours​ ​Modified Phosphomolybdate Method/Siemens Dimension
​Eau Claire ​Monday through Sunday​ ​Less than 2 hours​ Phosphomolybdate Complex Endpoint Assay/Beckman AU
Park Falls
 ​Monday through Sunday​ ​Less than 2 hours​ Phosphomolybdate Complex Endpoint Assay/Beckman AU
​Ladysmith Medical Center ​​Monday through Sunday ​Less than 2 hours​ ​Phosphomolybdate Complex Endpoint Assay/Beckman AU​
​Lakeview Medical Center ​Monday through Sunday​ ​Less than 2 hours​ ​Phosphomolybdate Complex Endpoint Assay/Beckman AU
Marshfield​ Monday through Sunday​ Less than 2 hours​ Phosphomolybdate Complex Endpoint Assay/Beckman AU
​Minocqua ​Monday through Sunday​ ​Less than 2 hours​ ​Phosphomolybdate Complex Endpoint Assay/Beckman AU
Neillsville​​Monday through Sunday​​Less than 2 hours​​​Modified Phosphomolybdate Method/Siemens Dimension
​Stevens Point ​​Monday through Friday ​Less than 2 hours​ Phosphomolybdate Complex Endpoint Assay/Beckman AU​​
​Wisconsin Rapids ​Monday through Friday ​Less than 2 hours​ ​Modified Phosphomolybdate Method/Siemens Dimension
Reference Range Information
Performing Location Reference Range
Marshfield and Weston Center​
 Male and Female:
       0-3 months:    3.0 - 7.2 mg/dL
      4-12 months:   3.1 - 6.7 mg/dL
       >= 18 years:   2.2 - 4.5 mg/dL
Female: 
   13 - 24 months:   3.1 - 6.3 mg/dL
   25 mo. - 12 yrs:   3.1 - 5.9 mg/dL
      13 - 14 years:   3.1 - 5.5 mg/dL
      15 - 17 years:   3.1 - 4.8 mg/dL
Male:
   13 - 24 months:   3.1 - 6.2 mg/dL
   25 mo. - 12 yrs:   3.1 - 5.9 mg/dL
      13 - 17 years:   3.1 - 5.3 mg/dL
See Critical Value List for list of current critical values​
All other performing sites​

​>= 18 years: 2.6 - 4.7 mg/dL


No pediatric reference intervals available.

Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
84100 ​ ​ ​ ​ ​
Synonyms/Keywords
PO4, Inorganic Phosphorus, Phos, Phosphate​
Ordering Applications
Ordering Application Description
Cerner
 ​Phosphorus Level

If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
​No Plasma​/Serum Lithium-heparin Plasma Separator (PST)​, Serum Separator Tube (SST) Lithium or Sodium-heparin Green Top (GTT), Red Top Tube (RTT) 1 mL​ 0.3 mL​ 0.4 mL whole blood​
Specimen Stability Information
Specimen Type Temperature Time
Plasma​/Serum ​ ​ Ambient​ 8 hours​
Refrigerate​ 2 days​
Frozen​ 2 months
Rejection Criteria
Hemolyzed samples​
Samples collected with Potassium oxalate/sodium fluoride and EDTA
Interference
Phosphorus may be falsely increased due to hemolysis.​
Useful For
Measurements of phosphorus (inorganic) are used in the diagnosis and treatment of various disorders, including:  parathyroid gland and kidney diseases, and vitamin D imbalance.​
Reference Range Information
Performing Location Reference Range
Marshfield and Weston Center​
 Male and Female:
       0-3 months:    3.0 - 7.2 mg/dL
      4-12 months:   3.1 - 6.7 mg/dL
       >= 18 years:   2.2 - 4.5 mg/dL
Female: 
   13 - 24 months:   3.1 - 6.3 mg/dL
   25 mo. - 12 yrs:   3.1 - 5.9 mg/dL
      13 - 14 years:   3.1 - 5.5 mg/dL
      15 - 17 years:   3.1 - 4.8 mg/dL
Male:
   13 - 24 months:   3.1 - 6.2 mg/dL
   25 mo. - 12 yrs:   3.1 - 5.9 mg/dL
      13 - 17 years:   3.1 - 5.3 mg/dL
See Critical Value List for list of current critical values​
All other performing sites​

​>= 18 years: 2.6 - 4.7 mg/dL


No pediatric reference intervals available.

For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
​Beaver Dam
​​Monday through Sunday
​​Less than 2 hours​
​Phosphomolybdate Complex Endpoint Assay/Beckman AU​
Chippewa Falls​
 ​​Monday through Friday ​Less than 2 hours​ ​Modified Phosphomolybdate Method/Siemens Dimension
Weston
 ​Monday through Sunday​ ​Less than 2 hours​ ​Modified Phosphomolybdate Method/Siemens Dimension
​Eau Claire ​Monday through Sunday​ ​Less than 2 hours​ Phosphomolybdate Complex Endpoint Assay/Beckman AU
Park Falls
 ​Monday through Sunday​ ​Less than 2 hours​ Phosphomolybdate Complex Endpoint Assay/Beckman AU
​Ladysmith Medical Center ​​Monday through Sunday ​Less than 2 hours​ ​Phosphomolybdate Complex Endpoint Assay/Beckman AU​
​Lakeview Medical Center ​Monday through Sunday​ ​Less than 2 hours​ ​Phosphomolybdate Complex Endpoint Assay/Beckman AU
Marshfield​ Monday through Sunday​ Less than 2 hours​ Phosphomolybdate Complex Endpoint Assay/Beckman AU
​Minocqua ​Monday through Sunday​ ​Less than 2 hours​ ​Phosphomolybdate Complex Endpoint Assay/Beckman AU
Neillsville​​Monday through Sunday​​Less than 2 hours​​​Modified Phosphomolybdate Method/Siemens Dimension
​Stevens Point ​​Monday through Friday ​Less than 2 hours​ Phosphomolybdate Complex Endpoint Assay/Beckman AU​​
​Wisconsin Rapids ​Monday through Friday ​Less than 2 hours​ ​Modified Phosphomolybdate Method/Siemens Dimension
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
84100 ​ ​ ​ ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.