Ordering Recommendation

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation

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

Specimen Preparation

Adjust pH to less than or equal to 2 by adding 6M HCl. Transfer a 4 mL aliquot of urine 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. Also acceptable: Specimens previously preserved with boric acid.

Storage/Transport Temperature


Unacceptable Conditions

Ambient: 8 hours; Refrigerated: 2 weeks; Frozen: 1 month


Quantitative Enzymatic Assay




Within 24 hours

Reference Interval

Test Number
Reference Interval
  Citric Acid, Urine - per 24h 18 years and older: 320-1240 mg/d
  Citric Acid/Creatinine Ratio, Urine 1 year and older: greater than or equal to 150 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.

This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.

Compliance Category

Laboratory Developed Test (LDT)


Hotline History


CPT Codes



Component Test Code* Component Chart Name LOINC
0020207 Creatinine, Urine - per volume 2161-8
0020208 Creatinine, Urine - per 24h 2162-6
0020242 Citric Acid, Urine - per 24h 6687-8
0020243 Citric Acid, Urine - per volume 2128-7
0020744 Citric Acid/Creatinine Ratio, Urine 13722-4
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.


  • Citrate
  • Citric Acid, Random Urine
  • Citric Acid, Urine
  • Citric Acid/Creatinine Ratio, Random Urine
  • Urinary Citrate Excretion
Citric Acid, Urine