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Test Name:

PARATHYROID HORMONE (PTH), INTACT

Test Code:

2127501

Alias:

LAB9032
Parathyrin

CPT Code(s):

83970

Preferred Specimen:

2.0 mL serum

Container:

SST (gold)

Alternate Container:

EDTA (lavender) - must be spun down and plasma separated within 2 hours of collection prior to sending to lab if coming from a client

Lithium Heparin (Lt green)

Minimum Volume:

0.5 mL serum or plasma

This volume does not allow for repeat testing.

Collection Instructions:

SST Collection: Allow specimen to completely clot (this can take up to 60 minutes). Centrifuge for 15 minutes. The serum should be physically separated from contact with cells within 2 hours from the time of collection. The tube must be spun down and serum aliquoted into a transfer tube prior to freezing and transporting to the lab.

EDTA/Lt Green Collection: Centrifuge and transfer plasma into a properly labeled transfer tube within 2 hours of collection.

Transport Temperature:

Refrigerated

Stability:

Room Temperature: 4 hours (serum)

8 hours (plasma)

Refrigerated: 48 hours (serum)

48 hours (plasma)

Frozen: 6 months (serum or plasma)

Rejection Criteria:

Hemolysis

Schedule:

Set up Daily: Results in 24-48 hours

Method:

Paramagnetic-particle, chemiluminescent immunoassay

Clinical Significance:

PTH measurements are used in the differential diagnosis of hyperparathyroidism, hypoparathyroidism, or hypercalcemia of malignancy. Assay results should be used in conjunction with other clinical data to assist the clinician in making individual patient management decisions. Parathyroid hormone (PTH) is secreted by the parathyroid gland. PTH plays a crucial role in maintaining calcium homeostasis and its measurement is an important aid in the diagnosis of calcium related disorders. PTH regulates calcium levels by concerted effect on three principle organs: bone, intestinal mucosa, and kidney. In healthy individuals, PTH secretion responds to small alterations in plasma ionized calcium concentrations within seconds. Abnormally low ionized calcium concentrations trigger PTH secretion, whereas rising levels of extracellular calcium reduce PTH secretion through a negative feedback mechanism.

Reference Ranges:

Updated 3/29/24

Reference Range Table

Result	Units	Gender	Age	Range
PTH, Intact	pg/mL	Both	0 Year - 999 Year	12-88

Health Lab Test Code Build Information

The CPT codes included in this publication are in accordance with Current Procedural Terminology, a publication of the American Medical Association. CPT codes are provided here for the convenience of our clients; however, correct coding often varies from one carrier to another, and HealthLab may bill specific carriers using codes other than those shown. Clients who bill for services should verify the code(s) with the applicable payor to confirm that their use is appropriate in each case.

Reference Range Table

Health Lab Test Code Build Information

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