Parathyroid Hormone (PTH) Intact, Serum

Test Code

307

CPT Codes
83970

Preferred Specimen

Container/Tube: Yellow-Top Serum gel tube (SST) or Green-Top Lithium Heparin gel tube (PST)
Specimen Volume: 2 mL of serum or plasma
Collection Instructions: Centrifuge and send serum or plasma in a plastic vial (refrigerated serum must be tested within 48 hours).

Due to the nocturnal rise in intact-PTH level, specimen should be collected in the morning, after 7 am; preferable following an overnight fast.

Specimen Stability

Correct handling of patient samples is critical to ensure the integrity of the intact PTH molecule. Intact PTH has been demonstrated to be labile and is susceptible to fragmentation. This instability depends on both time and temperature. Patient sample stability is outlined in the following table:
Temperature                EDTA Plasma Stability       Serum Stability
Room Temperature        8 hours                               4 hours
4°C                               72 hours                             48 hours
-70°C                           8 months                           Not tested

Methodology
Chemiluminescence

Setup Schedule

Monday through Sunday

Reference Range

South and FDC laboratory:
18.0-88.0 pg/mL

Branson Laboratory:
12.0-88.0 pg/mL

Performed By
CoxHealth

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.