PLATELET COUNT

Test Code

LAB301

Quest Code

723

CPT Codes
85049

Preferred Specimen

Whole blood from a full EDTA (lavender-top) tube

Minimum Volume

Microtainer 0.5 mL • 1 mL whole blood EDTA tube

Other Acceptable Specimens

Whole blood from full EDTA (tan-top) tube

Instructions

Maintain specimen at room temperature. Do not refrigerate. If multiple draw, collect EDTA (lavender-top) tube last. Traumatic draw can introduce thromboplastin and trap WBC and platelets. Refrigeration can precipitate fibrin and trap WBC and platelets.

Note: If drawn with lead testing, EDTA (tan-top) is required.

Transport Container

EDTA (lavender-top) tube

Transport Temperature

Room temperature - do not refrigerate

Specimen Stability

Room temperature: 48 hours
Refrigerated: Not provided
Frozen: Not provided

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis • Clotted

Methodology
Electronic Cell Sizing/Counting/Cytometry/Microscopy

Setup Schedule

Mon-Sat

Report Available

2 days

Reference Range

≤3 Days	150-450 Thousand/µL
4 Days-6 Months	150-400 Thousand/µL
>6 Months	140-400 Thousand/µL

Clinical Significance

Platelets must be present in adequate numbers and have proper function to aid in hemostasis.

Performing Laboratory

Quest Diagnostics-Lenexa

10101 Renner Blvd

Lenexa , KS 66219-9752

Last Updated: August 13, 2021

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.