Test Directory
7345 Calcium, Ionized*
Specimen Type
Specimen Stability
Reference Range
Serum-SST
7 days 2-8°C
< 8 months: Call Client Services
< 11 years: 4.9 - 5.4 mg/dL
< 18 years: 4.8 - 5.3mg/dL
>= 18 years: 4.8 - 5.6mg/dL
< 11 years: 4.9 - 5.4 mg/dL
< 18 years: 4.8 - 5.3mg/dL
>= 18 years: 4.8 - 5.6mg/dL
Specimen Requirements
Preferred amount: 2.0 mL Serum
Minimum amount: 0.6 mL Serum
Minimum amount: 0.6 mL Serum
Method
ISE
Schedule
*Sendout: Tue-Sat
Turn-Around Time
Same day following testing
Instructions/Notes
Centrifuge required?: Yes
Clinical Utility
Ionized calcium represents the true bioavailable calcium in the circulation. In situations where the total calcium is normal, but does not fit the clinical picture, a determination of the ionized calcium will, many times show an elevation in the bioavailable calcium.
CPT Codes
82330
