Compare this test’s laboratory options
Apolipoprotein B
Quest Diagnostics1 test optionFrom $37.80
Apolipoprotein B
Quest DiagnosticsCatalog information reviewed: August 24, 2026 by the Sunridge Medical clinical team.
What this laboratory test evaluates
Cardio IQ® Apolipoprotein B
This test measures the level of Apolipoprotein B (APO B) in your blood, which is a strong indicator of coronary artery disease (CAD). It's particularly useful because APO B levels can be elevated even when LDL cholesterol levels are normal, helping to identify risk in patients who might otherwise be considered low-risk based on cholesterol alone.
What patients is this test right for?This test is especially important for individuals who may be at risk for coronary artery disease, even if they have normal LDL cholesterol levels. It's a critical tool for a more comprehensive assessment of heart health.
What type of sample is required for this test?1 mL serum.
Test ResourcesResources are currently not available.
Additional test information
Cardio IQ® Apolipoprotein B – This test measures the level of Apolipoprotein B (APO B) in your blood, which is a strong indicator of coronary artery disease (CAD). It's particularly useful because APO B levels can be elevated even when LDL cholesterol levels are normal, helping to identify risk in patients who might otherwise be considered low-risk based on cholesterol alone.
Collection and processing
- Sample type: Serum
- Fasting: No
- Estimated laboratory processing: Results should be available in 2 – 5 business days after the sample is collected
How Sunridge uses laboratory information
Sunridge considers the medical question, symptoms, history, medications, prior results, and whether the finding could change care before recommending testing. A laboratory result is not interpreted in isolation and does not establish a diagnosis by itself.
Before requesting this test
Availability, collection requirements, eligibility, and processing estimates can change. Sunridge reviews each request and, when appropriate, creates the order through Fullscript. Follow the current instructions supplied with the approved order.
Common questions about this laboratory test
- What sample does this test require?
- The listed sample type is Serum. Confirm current collection instructions in the approved order.
- Does this test require fasting?
- The current catalog record lists fasting as: No. Follow the instructions supplied with the approved order.
- How long does laboratory processing usually take?
- Results should be available in 2 – 5 business days after the sample is collected. Timing can change after collection or if a laboratory requires additional review.
About this test
Cardio IQ® Apolipoprotein B
This test measures the level of Apolipoprotein B (APO B) in your blood, which is a strong indicator of coronary artery disease (CAD). It's particularly useful because APO B levels can be elevated even when LDL cholesterol levels are normal, helping to identify risk in patients who might otherwise be considered low-risk based on cholesterol alone.
What patients is this test right for?This test is especially important for individuals who may be at risk for coronary artery disease, even if they have normal LDL cholesterol levels. It's a critical tool for a more comprehensive assessment of heart health.
What type of sample is required for this test?1 mL serum.
Test ResourcesResources are currently not available.
Additional details
Cardio IQ® Apolipoprotein B - This test measures the level of Apolipoprotein B (APO B) in your blood, which is a strong indicator of coronary artery disease (CAD). It's particularly useful because APO B levels can be elevated even when LDL cholesterol levels are normal, helping to identify risk in patients who might otherwise be considered low-risk based on cholesterol alone.
Highlighted health areas
- Cardiovascular
- Metabolic function
Biomarkers and report focus
The exact analytes and report format can change. Confirm the current contents in the Fullscript order before payment.
- Apolipoprotein B