PTH, INTACT AND CALCIUM

Test Code

LAB813

CPT Codes
83970

Includes

PTH
Calcium

Preferred Specimen

5.0 mL Gold SST

Minimum Volume

2.0 mL

Other Acceptable Specimens

7 mL Red Top Tube

Instructions

Centrifuge immediately

Methodology
ECLIA
Cresolphthalein Complexone

Setup Schedule

Set Up:Monday-Sunday Report Available:24 hours

Reference Range

Intact PTH:	15-65 pg/mL

Calcium:
	0 - 10 days: 7.6 - 10.4 mg/dL 11 days - 2 years: 9.0 - 11.0 mg/dL 3 - 12 years: 8.8 - 10.8 mg/dL 13 - 60 years: 8.4 - 10.2 mg/dL 61 - 90 years: 8.8 - 10.2 mg/dL >= 91 years: 8.2 - 9.6 mg/dL

Clinical Significance

Parathyroid gland disorders lead to elevated or depressed blood calcium levels (hypercalcemia or hypocalcemia) brought about by a change in the secretion of PTH. Detection of sub-functioning parathyroid glands (hypoparathyroidism) requires the use of a highly sensitive test in order to be able to measure PTH levels well below normal. Hyperfunctioning of the parathyroid glands results in an increased secretion of PTH (hyperparathyroidism). Primary causes are adenomas of the parathyroid glands. In secondary hyperparathyroidism the blood calcium level is low as a result of other pathological states (e.g. vitamin D deficiency). Today, great significance is attached to the determination of the PTH and calcium concentrations when assessing hyperparathyroidism.

Performing Laboratory
GBMC Chemistry

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.