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Calcium, Serum

Tube Type

Test ID LAB53
CPT Code(s) 82310
Group/Individual Test Individual
Laboratory Core Laboratory
Tube Station Routine 30; STAT 888
Specimen Routine: 1 mL blood/serum separator tube/gold top/red top & royal blue acceptable
micro: 200 µL blood/serum separator bullet/gold top/red top



</= 6 hrs

Room Temp: </= 4 hrs
Refrigerated: </=22 days
Frozen: 12 months

Availability 24 hrs/day
Turnaround Time STAT 1hr; Routine 2hrs
Reference Range Normal:

see Table below

Reference ranges effective July 1997

Critical: <6 mg/dL or >12 mg/dL
Comments See Memorandum 159

Reference Ranges: Serum Calcium

Age mg/dL
Cord Blood 8.2-11.2
Prem 6.2-11.0
0-10d 7.6-10.4
10d-24mo 9.0-11.0
24mo-12yr 8.8-10.8
12yr + 8.5-10.2

Reviewed by Christopher Parker on January 15, 2020

Note: Reference ranges provided on this web site are for guidance only, and may not reflect the most recent changes. Refer to laboratory reports for current reference data.

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514