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HDL Cholesterol, Direct — Serum, Mass Concentration

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

Measures the amount of cholesterol carried by high-density lipoprotein in blood to help assess cardiovascular risk.

Quick summary

["Direct HDL cholesterol measures the cholesterol carried by HDL, a lipoprotein involved in moving cholesterol through the blood."]

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

Key facts at a glance

LOINC
96596-2
Short code
HDLc DBS-mCnc
Synonyms
HDLc DBS-mCnc
Category
lipid
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
40
Ref high
60
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
83700
SNOMED
113079008
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 blood test measures the amount of cholesterol carried by high-density lipoprotein (HDL). HDL is often called “good cholesterol” because it helps transport cholesterol away from arteries back to the liver.

Why might I need this test?

This test may be used to help assess cardiovascular risk, particularly when a complete lipid panel is ordered. Results are considered along with total cholesterol, LDL cholesterol, triglycerides, and other risk factors.

How is the test performed?

A blood sample is collected, and the serum is separated from the cells. A laboratory then uses a direct assay to measure the cholesterol contained in HDL.

How do I prepare for the test?

Fasting may be requested, often for 8 to 12 hours, especially when this test is part of a lipid panel. Follow your clinician’s instructions, and tell the laboratory if you have recently eaten or if another test requires you to fast.

Reference range

Adult males: >40 mg/dL; Females: >50 mg/dLN/A

Specimen: serum

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.

A lower HDL cholesterol level may be associated with increased cardiovascular risk and can occur with factors such as smoking, diabetes, obesity, low physical activity, or inherited conditions. A higher level is generally associated with lower risk, but it does not prevent cardiovascular disease by itself. HDL results must be interpreted with the rest of the lipid panel and your overall health history.

Short name

Direct HDL cholesterol

Frequently asked questions

Is a higher HDL cholesterol result always better?
Higher HDL is generally associated with lower cardiovascular risk, but it is not a stand-alone measure of heart health. Very high levels do not necessarily provide additional protection.
Why might I need both standard and direct HDL cholesterol tests?
A direct method may be used when another HDL measurement is inaccurate or difficult to interpret, including in samples with very high triglycerides. Your clinician can explain why both results were requested.
Do I need to fast for this test?
Fasting depends on the laboratory’s instructions and whether other tests are being performed at the same time. If fasting is required, it is commonly for 8 to 12 hours; water is usually allowed.
  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