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Test Code 272 Parathyroid Hormone (PTH) Intact

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.

Additional Codes

ALAB: PTHI

PowerChart: Parathyroid Hormone (PTH) Intact

MA Cerner: PTH Intact

Specimen Requirement

0.5 mL serum or plasma (heparin or EDTA) is required.

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.

Useful For

Diagnosis and differential diagnosis of hypercalcemia

Diagnosis of primary, secondary, and tertiary hyperparathyroidism

Diagnosis of hypoparathyroidism

Monitoring end-stage renal failure patients for possible renal osteodystrophy

 

Performance

Testing is performed Monday through Sunday.

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

CPT Code Information

83970: Chemistry: Parathormone (parathyroid hormone)

LOINC Code Information

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

Test Method

Two-Site Immunoenzymatic ("Sandwich") Assay; Beckman

Reference Values

15-65 pg/mL