Potassium, Plasma or Serum
0020002
Ordering Recommendation
Submit With Order
Mnemonic
K
Methodology
Quantitative Ion-Selective Electrode
Performed
Sun-Sat
Reported
Within 24 hours
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Patient should avoid exercise of arm or hand before and during collection.  
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
Urine (refer to Potassium, Urine, ARUP test code 0020849). Specimens collected in citrate, EDTA, potassium oxalate, or sodium fluoride. Hemolyzed specimens.  
Remarks
 
Stability
After separation from cells: Ambient: 2 weeks; Refrigerated: 2 weeks; Frozen: 6 months  
Reference Interval
0-7 days: 3.2-5.5 mmol/L
8 days-1 month: 3.4-6.0 mmol/L
2-6 months: 3.5-5.6 mmol/L
7-11 months: 3.5-6.1 mmol/L
1 year and older: 3.3-5.0 mmol/L
Interpretive Data
Note
CPT Code(s)
84132
Components
Component Test Code*Component Chart Name
0020002Potassium, Serum or Plasma
* 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.
Cross References
  • blood potassium
  • K blood level
  • K blood test
  • K bood concentration
  • potassium blood