Cleveland Heartlab Test, Z


CPT Code: 84630
Order Code: 945
ABN Requirement: No
: Royal (Navy) Blue Top Plasma, EDTA or Heparin
Volume:  2.0 mL
Minimum Volume:  0.7 mL
Container: Royal (Navy) Blue Top Tube, EDTA or Heparin


  1. Draw and gently invert 8 to 10 times.
  2. Centrifuge for 10 minutes.
  3. Aliquot the plasma specimen into a labeled plastic, acid-washed or metal-free vial labeled as “Navy EDTA plasma” or “Navy Heparin Plasma” and cap tightly. Discard original tube.
  4. Store transport tube refrigerated at 2-8°C until ready to ship.

Special Information: Separate plasma from cells within 2 hours. Centrifuge and transfer plasma to a plastic, acid-washed or metal-free vial.

Transport: Store specimen at 2-8°C after collection and ship the same day per packaging instructions included with the provided shipping box.


Ambient (15-25°C): 5 days
Refrigerated (2-8°C): 
10 days
Frozen (-20°C): 
30 days

Causes for Rejection: Specimens other than plasma collected in Royal (Navy) Blue Top tube; improper labeling; samples not stored properly; samples older than stability limits; specimens not separated from cells; sample submitted in non-trace metal-free or nonacid-washed containers; hemolysis

Methodology: Inductively Coupled Plasma/Mass Spectrometry (ICP/MS) or Atomic Spectroscopy

Turn Around Time: 2 to 3 days

Reference Range:

≤5 Months26-141
6-11 Months29-131
12-23 Months31-120
2-3 Years29-115
4-5 Years48-119
6-9 Years48-129
10-13 Years25-148
14-17 Years46-130

Clinical Significance: Zinc is an essential element involved in a myriad of enzyme systems including wound healing, immune function, and fetal development. Zinc measurements are used to detect and monitor industrial, dietary, and accidental exposure to zinc. Also, zinc measurements may be used to evaluate health and monitor response to treatment.

The CPT codes provided 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 payer being billed.