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Esterified Cholesterol Test

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

Measures esterified cholesterol in blood, providing information about the cholesterol carried by lipoproteins and helping assess cardiovascular risk.

Quick summary

["This test helps evaluate cholesterol levels and cardiovascular risk, but results are best interpreted with the rest of your lipid profile."]

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

Key facts at a glance

LOINC
99061-4
Short code
Esterified Cholest Act/Nor Fib
Synonyms
Esterified Cholest Act/Nor Fib
Category
lipid
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
86430
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 is this test?

This test measures esterified cholesterol in blood. Esterified cholesterol is cholesterol combined with a fatty acid and is found within lipoproteins that transport cholesterol through the bloodstream.

Why might I need this test?

Esterified cholesterol may be measured as part of a lipid profile to help assess heart and blood vessel disease risk. It may also be used to follow cholesterol-lowering treatment or evaluate conditions that affect cholesterol levels.

How is the test performed?

A blood sample is collected and analyzed in a laboratory using a method that can distinguish esterified cholesterol from other forms of cholesterol. It is often reported along with total, HDL, and LDL cholesterol and triglycerides.

How do I prepare for the test?

Follow any preparation instructions provided by your clinician or laboratory. Some lipid tests are performed after fasting, while others do not require it; eating normally for several hours beforehand can affect results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

An elevated esterified cholesterol result may reflect high overall cholesterol or increased cholesterol carried in atherogenic lipoproteins. Interpretation depends on the complete lipid profile, medical history, and other cardiovascular risk factors. This result should be reviewed by a healthcare professional rather than interpreted on its own.

Short name

Esterified cholesterol

Frequently asked questions

Is esterified cholesterol the same as total cholesterol?
No. Total cholesterol includes both free and esterified cholesterol, while this test measures the esterified portion.
Do I need to fast before this test?
It depends on the laboratory instructions and whether the test is being performed as part of a standard lipid profile. Fasting may be requested in some circumstances, but it is not required for every esterified cholesterol test.
Can this test alone determine my heart disease risk?
No. Your clinician will interpret it with other cholesterol measurements, triglycerides, blood pressure, diabetes status, smoking history, and other risk factors.
  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