Total Cholesterol, Serum
This test measures the total amount of cholesterol in your blood, which includes both low-density lipoprotein (LDL) and high-density lipoprotein (HDL) cholesterol, as well as triglycerides and other fats.
["Cholesterol levels help assess your risk for heart disease and other health conditions."]
Key facts at a glance
- LOINC
- 26821-9
- Short code
- LDL Fld Ql
- Synonyms
- LDL Fld Ql
- 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
What Cholesterol Levels Tell Us About Your Health
Cholesterol is a type of fat that your body needs for many important functions, such as building cell membranes and producing hormones. However, having too much cholesterol in your blood can increase your risk of developing heart disease or stroke. This test helps healthcare providers understand your overall cholesterol profile and whether you may need lifestyle changes or medication to manage your health.
Why This Test Might Be Ordered
Your healthcare provider may order this test as part of a routine checkup, to monitor your cholesterol levels over time, or to evaluate risk factors for heart disease. It’s often done alongside other tests, such as HDL cholesterol and triglycerides, to get a full picture of your lipid profile.
What to Expect Before the Test
For this test, a small amount of blood is drawn from a vein in your arm. You may feel a slight pinch when the needle is inserted, but most people find it over quickly. No special preparation is needed, though you should avoid eating or drinking anything for at least 12 hours before the test if it’s part of a fasting lipid panel.
What the Results Mean
The results of this test provide a single number representing your total cholesterol level. While this number alone doesn’t tell the whole story, it’s a key part of assessing your cardiovascular health. Your healthcare provider will use these results along with other factors, such as HDL cholesterol and triglycerides, to determine if your levels are within a healthy range or if further action is needed.
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.
Clinical Significance of Cholesterol Levels
Short name
Total Cholesterol
Frequently asked questions
How long does it take to get my cholesterol test results back?
What does a high total cholesterol level mean?
Can I lower my cholesterol naturally?
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