Ordering Recommendation

Mnemonic

UPHOS

Methodology

Quantitative Spectrophotometry

Performed

Sun-Sat

Reported

Within 24 hours

New York DOH Approval Status

This test is New York DOH approved.

Specimen Required

Patient Preparation
Collect

24-hour urine. Refrigerate specimen during collection. Also acceptable: Random urine.

Specimen Preparation

Mix entire 24-hour collection. Adjust pH to 1.5-2.0 by adding 6M HCl in 1 mL increments. Transfer one 3 mL aliquot from a well-mixed 24-hour collection to an ARUP Standard Transport Tube. (Min: 0.5 mL) Record total volume, collection time interval, and pH on transport tube and test request form.

Storage/Transport Temperature

Frozen.

Unacceptable Conditions
Remarks
Stability

Ambient: 8 hours; Refrigerated: 48 hours; Frozen: 6 months

Reference Interval

Test Number
Components
Reference Interval
  Phosphorus, Urine - per volume 400-1300 mg/d
  Phosphorus/Creatinine Ratio, Urine Male:  
7-9 years: 165-1682 mg/g
10-12 years: 144-1234 mg/g
13-15 years: 101-1134 mg/g
16-17 years: 68-874 mg/g       
Female:
7-9 years: 153-1443 mg/g
10-12 years: 142-1321 mg/g
13-15 years: 81-930 mg/g
16-17 years: 58-846 mg/g

Interpretive Data

Per 24h calculations are provided to aid interpretation for collections with a duration of 24 hours and an average daily urine volume.  For specimens with notable deviations in collection time or volume, ratios of analytes to a corresponding urine creatinine concentration may assist in result interpretation.

Compliance Category

FDA

Note

Hotline History

N/A

CPT Codes

84105

Components

Component Test Code* Component Chart Name LOINC
0020207 Creatinine, Urine - per volume 2161-8
0020208 Creatinine, Urine - per 24h 2162-6
0020213 Phosphorus, Urine - per volume 2778-9
0020214 Phosphorus, Urine - per 24h 2779-7
0020583 Phosphorus/Creatinine Ratio, Urine 13795-0
0097110 Total Volume 19153-6
0097111 Hours Collected 30211-7
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • HPO4-2, PO4-3
  • phosphorus urine concentration
  • Inorganic phosphate
  • Phosphorus urine test
  • Phosphorus, urine
  • PO4
  • PO4 urine concentration
  • PO4 urine level
  • urine phosphate
  • Urine phosphorus
Phosphorus, Urine