
Creatinine, Serum or Plasma
0020025
Ordering Recommendation
Screening test to evaluate kidney function.
Mnemonic
CRT
Methodology
Quantitative Enzymatic
Performed
Sun-Sat
Reported
Within 24 hours
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
- Patient Preparation
- Collect
- Plasma separator tube or serum separator tube.
- Specimen Preparation
- Allow serum tube to clot completely at room temperature. Separate serum or plasma from cells within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.2 mL)
- Storage/Transport Temperature
- Refrigerated.
- Unacceptable Conditions
- Specimens obtained through catheters used to infuse hyperalimentation fluid. Specimens with potassium oxalate/sodium fluoride, citrate, or EDTA as anticoagulants.
- Remarks
- Stability
- After separation from cells: Ambient: 1 week; Refrigerated: 1 week; Frozen: 3 months
Reference Interval
By report (reports may vary based on instrumentation)
Interpretive Data
Note
Assay interference (negative) may be observed when high concentrations of N-acetylcysteine (NAC) are present. Negative interference has also been reported with NAPQI (an acetaminophen metabolite) but only with concentrations at or above those expected during acetaminophen overdose.
Hotline History
N/A
CPT Code(s)
Components
Component Test Code* | Component Chart Name | LOINC |
---|---|---|
0020025 | Creatinine, Serum or Plasma | 2160-0 |
Aliases
- Blood Creatinine
- Creat
- Serum Creatinine