Low-Density Lipoprotein Cholesterol (LDL-C) with Specimen Concentration Measurement
This test measures the amount of LDL cholesterol in your blood, which is a key type of fat (lipid) that can build up in your arteries over time.
["LDL cholesterol is often called 'bad cholesterol' because high levels may increase your risk of heart disease."]
Key facts at a glance
- LOINC
- 92713-7
- Short code
- LDL very small-c Ser-sCnc
- Synonyms
- LDL very small-c Ser-sCnc
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 0
- Ref high
- 100
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 83721
- SNOMED
- 113079007
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why This Test Matters
LDL cholesterol is one of the main types of fat found in your blood. While cholesterol itself is necessary for your body, having too much LDL can lead to plaque buildup in your arteries, which may restrict blood flow and increase the risk of heart problems. This test helps doctors assess your cardiovascular health and plan treatments if needed.
How the Test Works
Blood is drawn from a vein, usually in your arm. The sample is processed to separate serum (liquid part of blood without clotting factors) and analyzed to measure LDL cholesterol concentration. The result is expressed in a standardized unit (e.g., milligrams per deciliter).
What to Expect Before the Test
No special preparation is usually needed, but you may be asked to fast for 9–12 hours before the test if your doctor recommends it. This helps ensure more accurate results. If you’re pregnant, have a chronic condition, or are on certain medications, let your healthcare provider know.
What to Expect During the Test
The test involves a small needle inserted into a vein in your arm. You may feel a brief pinch, but it usually doesn’t cause discomfort. The blood sample is collected in a tube and sent to a lab for analysis. The process takes about 5–10 minutes.
Reference range
Optimal: <100 mg/dLN/A
Fasting for 12-14 hours preferred. Water is permitted. Avoid alcohol for 24 hours before the test.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
High LDL cholesterol levels are a major risk factor for atherosclerosis (plaque buildup in arteries), which can lead to heart attacks, strokes, or peripheral artery disease. Doctors use LDL cholesterol levels to guide treatment plans, such as lifestyle changes, medications, or monitoring for other cardiovascular risks. Regular monitoring helps manage and reduce these risks over time.
Short name
LDL Cholesterol Level
Frequently asked questions
How long will I need to wait for my results?
Can I eat or drink before this test?
What if my LDL cholesterol is higher than expected?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy