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Cholesterol, Direct, Serum — Mass Concentration

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

A direct measurement of the amount of cholesterol in your blood serum, used to help evaluate cholesterol levels and cardiovascular risk.

Quick summary

["This test directly measures cholesterol in serum, but the result is best interpreted with your other cholesterol values and medical history."]

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

Key facts at a glance

LOINC
96588-9
Short code
Cholest DBS-mCnc
Synonyms
Cholest DBS-mCnc
Category
lipid
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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?

Direct cholesterol testing measures the amount of cholesterol in serum, the liquid part of blood after clotting. A direct method measures cholesterol rather than deriving a result from other cholesterol measurements.

Why might I need this test?

This test may be ordered to evaluate cholesterol as part of screening or follow-up for cardiovascular risk. It may also be used when a calculated cholesterol result is not considered appropriate.

How is the test performed?

A blood sample is drawn from a vein and sent to the laboratory. The laboratory separates the serum and uses a direct laboratory method to measure its cholesterol concentration.

How do I prepare for the test?

Fasting is not always required for a direct cholesterol test, but you should follow any instructions from your clinician or laboratory. If you are also having other lipid tests, ask whether fasting and avoidance of alcohol for the preceding day are required.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

A high cholesterol concentration may indicate dyslipidemia and can increase the risk of heart disease and stroke. Low cholesterol can occur with certain illnesses, nutritional problems, or medications. The result should be interpreted alongside HDL cholesterol, LDL cholesterol, triglycerides, and your cardiovascular risk factors.

Short name

Direct cholesterol

Frequently asked questions

Is this the same as a total cholesterol test?
Both tests measure cholesterol in serum, but they may use different laboratory methods. A direct result is measured directly rather than obtained through a calculation using other cholesterol values.
Do I need to fast before this test?
It depends on your clinician's instructions and whether other tests are being performed at the same time. When fasting is requested, it usually means avoiding food and beverages other than water for a specified period.
What can affect my cholesterol result?
Diet, body weight, physical activity, diabetes, thyroid disease, pregnancy, and cholesterol-lowering medicines can affect the result. An unusual result should be interpreted by your healthcare professional rather than treated on its own.
  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