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Serum or Plasma Total Cholesterol Concentration (Mass Concentration)

Published: August 9, 2026Updated: August 16, 2026

This test measures the total amount of cholesterol in your blood, which includes both the cholesterol your body makes and the cholesterol from foods you eat. Cholesterol is a type of fat that plays a key role in many of your body’s functions.

Quick summary

["Your cholesterol levels help assess your risk for heart disease and other health conditions."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
9717-0
Short code
T canis IgA Ser IA-aCnc
Synonyms
T canis IgA Ser IA-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia
CPT
82784
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 Is Done

Doctors may order this test to check your overall cholesterol levels, monitor existing heart disease risk, or evaluate conditions like high blood pressure, diabetes, or kidney disease. It’s also part of routine check-ups to help prevent health problems down the line.

What to Expect Before the Test

You may be asked to fast for 8–12 hours before the test to get a more accurate reading. Avoid eating or drinking anything except water during this time. Bring any medications you’re taking to your appointment.

How the Test Works

A healthcare provider will draw blood from a vein in your arm. The blood sample is then sent to a lab, where it’s analyzed to measure cholesterol levels using a specialized test.

What the Results Mean

Results are typically reported as a single number representing your total cholesterol concentration. While specific ranges vary by lab, higher-than-normal levels may indicate an increased risk for heart disease or other health concerns.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

High cholesterol levels can lead to plaque buildup in your arteries, increasing the risk of heart attack, stroke, or peripheral artery disease. Regular monitoring helps manage risk factors and guide lifestyle or treatment recommendations.

Short name

Total Cholesterol

Frequently asked questions

What causes high cholesterol levels?
High cholesterol can result from a combination of factors, including genetics, diet high in saturated or trans fats, lack of physical activity, obesity, and certain medical conditions like diabetes or high blood pressure. Lifestyle changes or medications may help manage it.
How can I lower my cholesterol naturally?
Eating a heart-healthy diet rich in fruits, vegetables, whole grains, and lean proteins, along with regular exercise, can help lower cholesterol. Avoiding processed foods, reducing saturated fats, and maintaining a healthy weight are also key steps.
Do I need to take any special steps after the test?
No special steps are needed after the test. If you had fasting instructions, you can resume eating and drinking normally afterward. Follow up with your doctor if you have questions about your results or need further testing.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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