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PTH, Intact and Calcium
Test CodePTHCA
Alias/See Also
Parathyroid Hormone with Calcium
CPT Codes
82310, 83970
Includes
PTH and Calcium
Preferred Specimen
2 mL of whole blood (1.0 mL of serum or plasma)
Minimum Volume
1.2 mL of whole blood (0.6 mL of serum or plasma)
Transport Container
Serum Separator (gold top) or lithium heparin plasma (green or mint top)
Transport Temperature
Refrigerated
Specimen Stability
Room Temperature: Unacceptable
Refrigerated: 48 hours
Frozen: 4 weeks at -20 C
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Turbidity and Hemolysis
Methodology
Immunometric Immunoassay
Setup Schedule
Monday through Saturday
Report Available
Specimens received by noon will be reported by 4:30 p.m. Specimens received after noon will be reported by the next morning.
Reference Range
8 to 54 pg/mL
Clinical Significance
Primary role of PTH is to maintain calcium hemostasis via its interaction with calcitonin. PTH measurement is an important aid in the diagnosis of disorders of calcium metabolism.
