LDL Cholesterol (Direct)


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Quest Diagnostics Test Code: 83721, 8293

Includes direct LDL and is called as ‘bad cholesterol’. The test determines if it is high or within normal range. Increased level of LDL has an important role in atherosclerotic plaque buildup.

The low-density lipoprotein is a type of cholesterol found in the body. This has frequently been considered the “bad” type of cholesterol as it is involved in the disease processes associated with atherosclerosis which inevitably leads to heart disease and cerebrovascular accidents. The direct low-density lipoprotein test measures the levels of this cholesterol in the blood in order to determine the cardiovascular risk of the patient and to establish the need for statin therapy.

This test is performed in following conditions such as:

• Cigarette smoking
• Being overweight or obese
• Unhealthy diet
• Increasing age (men above 45)
• High blood pressure
• Family history of heart disease
• Current heart disease
• Diabetes

Also Known As: Low-Density Lipoprotein


The LDL test has no fasting requirements. LDL may decrease with acute illness, accident or surgery or increase during pregnancy. It is recommended that those people wait 6 weeks before testing.


Specimen Collected
  • Blood
Estimated Time Taken

The turnaround time for a LDL Cholesterol (direct) test is typically 1 business day.

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