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Creatine, Urine
2002343
Ordering Recommendation

Monitor patients receiving creatine supplementation. May be useful when evaluating for possible creatine transporter deficiency; however, the preferred test is Creatine Disorders Panel, Urine (2002333).

Mnemonic
CRTN URINE
Methodology
Liquid Chromatography/Tandem Mass Spectrometry
Performed
Mon
Reported
2-9 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
 
Collect
Random urine. 
Specimen Preparation
Transfer 2 mL urine to an ARUP Standard Transport Tube and freeze immediately. (Min: 0.5 mL) 
Storage/Transport Temperature
Frozen. 
Unacceptable Conditions
Specimens exposed to more than one freeze/thaw cycle. 
Remarks
 
Stability
Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen: 2 weeks 
Reference Interval
Effective May 20, 2013
Less than 4 years23 - 1500 mmol/mol
4-10 years24 - 890 mmol/mol
11-150  years10 - 370 mmol/mol

Interpretive Data
For random or timed specimens other than 24 hrs, the result represents the total milligrams of creatine excreted during the collection period.

Reference ranges for creatine have been established for random urine collections, in mmol/mol creatinine.

Compliance Statement B: This test was developed and its performance characteristics determined by ARUP Laboratories. The U.S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.

Note
To evaluate inherited disorders of creatine metabolism or transport, please use Creatine Disorders Panel, Plasma or Serum (2002328) and/or Creatine Disorders Panel, Urine (2002333).
CPT Code(s)
82540
Components
Component Test Code*Component Chart NameLOINC
0097110Total Volume19153-6
0097111Hours Collected30211-7
2002334Creatinine, Urine14683-7
2002338Creatine, Urine34275-8
2002344Creatine, Urine - mg/24hr2150-1
* 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
  • Urine creatine