PTH, Intact without Calcium : 35202

Test Code
PTHX or 35202

CPT Codes

Perferred: EDTA Lvender top tube.

Alternative Specimen for PTH: Frozen serum.

Transport Container
.Centrifuge the lavender top tube and aliquot 1.5 mL plasma (Min. 1.0 mL) into a standard transport tube and label as PLASMA.
Alternative Specimen: Centrifuge the serum separator tube and transport; if a plain red, centrifuge and aliquot 2.0 mL serum into a standard transport tube (Min. 1 mL) and label as SERUM.  Freeze aliquot.

Transport Temperature
EDTA plasma for PTH: Refrigerated.
Serum for PTH: Frozen.

Specimen Stability
EDTA Plasma for PTH: Room temperature: 48 hours; Refrigerated: 72 hours; Frozen:  6 months

Serum for PTH: Room temperature: Unacceptable; Refrigerated: Unacceptable; Frozen: 6 months

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross Hemolysis, Sodium and Lithium Heparin plasma


Setup Schedule
Sunday - Saturday

Report Available
1 day

Reference Range
Parathyroid Hormone, Intact:
<1 Year         7-58 pg/mL
1-7 Years    12-55 pg/mL
8-18 Years  12-71 pg/mL
≥19 Years   14-64 pg/mL
nterpretive Guide:
                                               Intact PTH                     Calcium
Normal Parathyroid           Normal                           Normal
Hypoparathyroidism          Low or Low Normal        Low
  Primary                              Normal or High              High
  Secondary                          High                              Normal or Low
  Tertiary                               High                              High
    Hypercalcemia               Low or Low Normal        High

Clinical Significance
This test is useful in making the diagnosis of primary hyperparathyroidism, secondary hyperparathyroidism, and a differential diagnosis of hypercalcemia. It may also help in distinguishing hypercalcemia caused by either primary hyperparathyroidism or malignant disease.

Performing Laboratory
med fusion

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.