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Test Code PTHIN Parathyroid Hormone (PTH) Intact LAB108

Important Note

Human Anti-Mouse Antibodies (HAMA) may be present in samples from patients who have received immunotherapy utilizing monoclonal antibodies. Additionally, other heterophile antibodies such as human anti-goat antibodies may be present in patient samples. Manufacturers formulate assays to minimize the effects of these antibodies; however careful evaluation of patient results must be done when patients are known to have such antibodies.

Test Method

Two-Site Immunoenzymatic (“Sandwich”) Assay; Beckman Access II


Testing is performed Monday through Sunday.

Typically completed the same day the specimen arrives at the
testing site.

Useful For

Diagnosis and differential diagnosis of hypercalcemia

Diagnosis of primary, secondary, and tertiary

Diagnosis of hypoparathyroidism

Monitoring end-stage renal failure patients for possible renal


Specimen Requirement

0.5 mL serum or plasma (heparin or EDTA) is

CPT Code Information

83970: Chemistry: Parathormone (parathyroid hormone)

Reference Values

15-65 pg/mL

LOINC Code Information

2731-8 Parathyrin.Intact [Mass/Volume] In Serum Or Plasma

Additional Specimen Collection Information

Collect blood in a lithium heparin, green-top, EDTA, purple
top, or red-top tube. PST and SST (gel tubes) are acceptable.
Serum or plasma should be separated from contact with the cells
within 2 hours of collection. Specimens not centrifuged within 4
hours of collection may be rejected. Refrigerate the specimen if
unable to assay within 8 hours of collection. Samples with
≥3+ lipemia must be cleared prior to analysis.