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Creatine Disorders Panel, Serum or Plasma
Ordering Recommendation
Initial test to diagnose or rule out creatine deficiency syndromes following clinical presentation. Order Creatine Disorders Panel, Urine (2002333), simultaneously for proper result interpretation.
New York DOH Approval Status
Specimen Required
Green (sodium or lithium heparin), lavender (K2EDTA), plain red, or serum separator tube (SST).
Separate from cells within 6 hours of collection. Transfer 1 mL serum or plasma to an ARUP standard transport tube and freeze immediately. (Min: 0.2 mL)
Frozen.
Clinical information is needed for appropriate interpretation. Additional required information includes age, gender, diet (e.g., TPN therapy), drug therapy, and family history. Biochemical Genetics Patient History Form is available on the ARUP Web site at https://www.aruplab.com/patienthistory or by contacting ARUP Client Services.
Ambient: 6 hours; Refrigerated: 1 week; Frozen: 6 months (Three freeze/thaw cycles are acceptable.)
Methodology
Liquid Chromatography-Tandem Mass Spectrometry
Performed
Mon, Thu
Reported
2-9 days
Reference Interval
Refer to Report
Interpretive Data
Laboratory Developed Test (LDT)
Note
Hotline History
CPT Codes
82540; 82542
Components
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 2002330 | Guanidinoacetic acid, Serum/Plasma | 33244-5 |
| 2002331 | Creatine, Serum/Plasma | 15045-8 |
| 2002332 | Creatine Disorder Serum/Plasma Interp |
Aliases
- Guanidinoacetic acid, plasma
- AGAT
- Guanidinoacetic Acid + Creatine
- GAMT
- Guanidinoacetic Acid and Creatine
- GAA & Creatine
- GAA + Creatine
- Creatine, Plasma
- Creatinine, plasma
