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Mayo Clinic Laboratories

Epic Code LAB113 Phosphorus

Test Name Alias

PHOS | Phosphorus Blood Level | Phosphorus serum | HPO4-2 | PO4-3 | Inorganic phosphate

Interface Order Alias

10056

Collection Instructions

Specimen Collection: Blood

 

Container(s): 4.5 mL Mint Green Top (Lithium Heparin Gel) or 5.0 mL Gold Top (Serum Separator-SST Gel)

Preferred Volume to Collect: 4.5 mL

Minimum Volume to Collect: 1.0 mL

Neonate Volume to Collect: 0.4 mL

Capillary collect ok? Yes

Microtainer acceptable: Yes

 

Collection Instructions:

  • After collection, gently invert tube 8-10 times.
  • Specimen should be processed within 2 hours – See Processing Instructions.

Processing Instructions (Laboratory, Outpatient or Off-site collection)

Processed Specimen: Plasma or Serum

Centrifuge/Spin: Yes

Aliquot: Yes

 

Processing Instructions:

  • Plasma is preferred specimen type
  • Green Tube/Plasma: Centrifuge after collection.
  • Gold Tube/Serum: Allow blood to clot for 30 minutes in a vertical position and centrifuge within 2 hours.

Transport Temperature: Refrigerate

Specimen Transport Temperature

Refrigerate

Specimen Stability

Ambient: 8 hours

Refrigerate: 72 hours

Frozen: aliquot plasma/serum for longer storage

Laboratory Retention: 72 hours

Test Frequency

Available 24 hours, usual TAT 1 day.

Reference Range

Male/Female Age CHW
0 minutes up to 3 months: 4.0 to 8.0 mg/dL 
3 months up to 4 years: 4.0 to 7.0 mg/dL
4 years up to 10 years: 3.5 to 6.0 mg/dL
10 years up to 16 years: 3.0 to 5.0 mg/dL
16 years and up: 2.5 to 4.5 mg/dL

Laboratory Critical Values Table

Age CHS

Female: 0 up to 30 Days

4.3-7.7 mg/dL
Female: 30 Days up to 1 Years 3.7-6.5 mg/dL
Female:1 Years up to 3 Years 3.4-6.0 mg/dL
Female: 3 Years up to 6 Years 3.2-5.5 mg/dL
Female: 6 Years up to 9 Years 3.1-5.5 mg/dL
Female: 9 Years up to 12 Years 3.3-5.3 mg/dL
Female: 12 Years up to 15 Years 2.8-4.8 mg/dL
Female: 15 Years up to 18 Years 2.5-4.8 mg/dL
Female: 18 Years up to Unspecified 2.5-4.5 mg/dL
   
Male: 0 up to 30 Days 3.9-6.9 mg/dL
Male: 30 Days up to 1 Years 3.5-6.6 mg/dL
Male: 1 Years up to 3 Years 3.1-6.0 mg/dL
Male: 3 Years up to 6 Years 3.3-5.6 mg/dL
Male: 6 Years up to 9 Years 3.0-5.4 mg/dL
Male: 9 Years up to 12 Years 3.2-5.7 mg/dL
Male: 12 Years up to 15 Years 2.9-5.1 mg/dL
Male: 15 Years up to 18 Years 2.7-4.9 mg/dL
Male:18 Years up to Unspecified 2.5-4.5 mg/dL

Laboratory Critical Values Table 

Performing Department

Chemistry

Performing Department Laboratory Location

CHW

Corewell Health Reference Laboratory, Grand Rapids, MI
Corewell Health Big Rapids Laboratory, Big Rapids, MI
Corewell Health Blodgett Laboratory, Grand Rapids, MI
Corewell Health Gerber Laboratory, Fremont, MI
Corewell Health Greenville Laboratory, Greenville, MI
Corewell Health Ludington Laboratory, Ludington, MI
Corewell Health Pennock Laboratory, Hastings, MI
Corewell Health Reed City Laboratory, Reed City, MI
Corewell Health Zeeland Laboratory, Zeeland, MI

 

CHS
Corewell Health Lakeland St. Joseph Laboratory, St. Joseph, MI
Corewell Health Lakeland Niles Laboratory, Niles, MI
Corewell Health Watervliet Laboratory, Watervliet, MI

Methodology

Molybdate UV

CPT

84100

CDM Code

3018410002

Epic Test ID

1230101039

LOINC

Phosphorus Lvl: 2777-1

Mayo Access Code

SHO8300

Reviewed Date

3/7/2024

Updated Date

3/15/2024 - Reference Range

5/28/2025 - CHS info added