LDL Direct

Message

This is a reflex test that is added on to a Lipid Panel when the calculated LDL cannot be performed.

Test Code

LDL DIRECT

Alias/See Also

Direct LDL
Chemistry

Preferred Specimen

Light green top plasma separator tube

Other Acceptable Specimens

Gold top serum separator tube

Transport Temperature

Refrigerate

Specimen Stability

Refrigerated (2-8°C): 5 days
Frozen (-80°C): 3 months
Max freeze/thaw cycles: 1

Methodology
Two phase homogeneous method

Setup Schedule

Daily

Report Available

TAT 1 - 3 days

Reference Range

0 - 129 mg/dL

Clinical Significance

LDL cholesterol is a key factor in the pathogenesis of atherosclerosis and Coronary Artery Disease (CAD), while HDL cholesterol has often been observed to have a protective effect. Even within the normal range of total cholesterol concentrations, an increase in LDL cholesterol can produce an associated increased risk for CAD. LDL cholesterol binds to receptor sites on macrophages in blood vessel walls inciting several changes to the blood wall which enhance atherosclerotic plaque development.

Performing Laboratory
Test performed in these BACL Chemistry Labs
Contact: Jonathan Dryjowicz-Burek, West Roxbury 857-203-5973
Alternate contact Diane Robert BR 774-826-2294

Last Updated: April 8, 2019

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.