Calcium, Serum

Message

Test performed at York Hospital Laboratory.

Test Code

CPT Codes
82310

Preferred Specimen

0.2 mL serum collected in a serum separator tube (SST)

Other Acceptable Specimens

0.2 mL serum collected in a no additive (red-top) tube, transferred to a plastic screw-cap vial 0.2 mL plasma collected in a lithium heparin (green-top) gel separator tube

Transport Temperature

Refrigerated

Specimen Stability

Room temperature: 4 hours
Refrigerated: 22 days
Frozen: 1 year

Methodology
Colorimetric

Setup Schedule

Daily

Report Available

Next Day
Available STAT 1/2 Hour

Reference Range

Age	Calcium (mg/dL)
<3 Years	8.7 - 9.8
4-11 Years	8.8 - 10.1
12-13 Years	8.8 - 10.6
14-15 Years	9.2 - 10.7
16-19 Years	8.9 - 10.7
Adult	8.4 - 10.6

Critical Values
<6.0 mg/dL or >12.0 mg/dL

Clinical Significance

Calcium is the major mineral component of bone; 99% of the body's calcium is in bone. Calcium ions play an important role in the transmission of nerve impulses and in maintaining normal muscle contraction. Abnormal concentrations of serum calcium may indicate malfunction of the parathyroid glands, bone diseases, carcinoma, malnutrition and malabsorption syndrome, vitamin D deficiency, overdose with calcium-containing antacids, and renal diseases.

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.