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Creatine, Urine
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).
New York DOH Approval Status
Specimen Required
Random urine or 24-hour urine, refrigerate during collection.
Transfer 2 mL aliquot from a well-mixed random collection or 24-hour urine to an ARUP standard transport tube and freeze immediately. (Min: 0.5 mL)
Frozen.
24-Hour Urine: Submit with order time of collection, and volume.
Ambient: 6 hours; Refrigerated: 24 hours; Frozen: 6 months (Three freeze/thaw cycles are acceptable.)
Methodology
Liquid Chromatography-Tandem Mass Spectrometry
Performed
Mon, Thu
Reported
2-9 days
Reference Interval
Effective May 20, 2013
| Age | Reference Interval |
|---|---|
| Less than 4 years | 23 - 1500 mmol/mol creatinine |
| 4-10 years | 24 - 890 mmol/mol creatinine |
| 11-150 years | 10 - 370 mmol/mol creatinine |
Interpretive Data
For random or timed specimens other than 24 hours, 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.
Laboratory Developed Test (LDT)
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).
Hotline History
CPT Codes
82540
Components
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 0097110 | Total Volume | 19153-6 |
| 0097111 | Hours Collected | 30211-7 |
| 2002334 | Creatinine, Urine | 14683-7 |
| 2002338 | Creatine, Urine | 34275-8 |
| 2002344 | Creatine, Urine - mg/24hr | 2150-1 |
Aliases
- Urine creatine
