Skip to content

Total Cholesterol

Published: August 9, 2026Updated: August 17, 2026

This test measures the total amount of cholesterol in your blood, an important measure of heart health.

Quick summary

["Cholesterol helps your body make hormones and cell membranes, but high levels can increase heart disease risk."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
97165-5
Short code
T3 24h Ur-sRate
Synonyms
T3 24h Ur-sRate
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Ref low
80
Ref high
200
Critical range
20 N/A – 400 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
84436
SNOMED
302346007
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your doctor may order this test to check for high cholesterol, monitor cholesterol levels over time, or evaluate risk factors for heart disease, especially if you have a family history of high cholesterol or cardiovascular issues.

What Does the Result Mean?

Results are typically reported as a single number (e.g., 150 mg/dL), but interpretation depends on your age, gender, and overall health. High levels may require lifestyle changes or medication.

Common Causes of Abnormal Results

High cholesterol may result from diet, genetics, or conditions like obesity or diabetes. Low levels could indicate liver disease or malabsorption issues.

How Is This Test Performed?

A blood sample is drawn from a vein, usually in your arm. The sample is sent to a lab for analysis using an automated method to measure total cholesterol content.

Reference range

Adult: 80-200 ng/dLN/A

Specimen: urine

Take your thyroid medication after the blood draw if applicable. No fasting required.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Cholesterol plays a critical role in cardiovascular health. High total cholesterol is a key risk factor for atherosclerosis (plaque buildup in arteries) and heart disease, while low levels may signal underlying health concerns.

Short name

Total Cholesterol Level

Frequently asked questions

What are the normal reference ranges for cholesterol?
Reference ranges vary by lab and individual factors. A general guideline is often provided, but your doctor will discuss your specific results with you.
How often should I get this test?
Your doctor will determine the frequency based on your health status, risk factors, and medical history. Regular screening may be recommended every 1–5 years.
Can diet or lifestyle changes affect cholesterol levels?
Yes, diet (e.g., reducing saturated fats), exercise, and weight management can significantly impact cholesterol levels. Ask your doctor for personalized advice.
  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 17, 2026. · Read our editorial policy