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HelpCatalog ID K Potassium, Plasma
CPOE Test Name
Potassium Level; K Level
Synonyms
K Level
Specimen Type
Plasma
Specimen Requirements
5 mL light green top tube (lithium heparin); light green cap microtainer acceptable; 2 mL blood
Causes for Rejection
Wrong container; hemolyzed; improper labeling; delay in separating serum from red cells
Reference Values
3.5 – 5.5 mEq/L
Critical Values
0-12 years: ≤ 3.0 mEq/L, ≥ 6.0 mEq/L;
12 years – adult: ≤2.8 mEq/L, ≥6.0 mEq/L
Performing Lab
Core Laboratory, BI 2023 721-2120
Turn Around Time
Urgent/Emergent 1 hour; Routine 2 – 4 hours
CPT / HCPCS Code
84132