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Calculated HDL Cholesterol, Serum/Plasma — Substance Concentration

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

This blood test estimates HDL cholesterol, a type of cholesterol that helps transport cholesterol away from the arteries.

Quick summary

["Higher HDL cholesterol is generally associated with a lower risk of cardiovascular disease."]

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

Key facts at a glance

LOINC
56132-4
Short code
HDLc 2a SerPl-sCnc
Synonyms
HDLc 2a SerPl-sCnc
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 test measures the concentration of high-density lipoprotein (HDL) cholesterol in blood. HDL carries cholesterol from tissues back to the liver and is often called “good cholesterol.”

Why might I need this test?

A clinician may order it as part of a cardiovascular risk assessment or to monitor cholesterol-lowering treatment. HDL is considered together with total cholesterol, LDL cholesterol, triglycerides, and other risk factors.

How is the test performed?

A blood sample is collected and analyzed as part of a lipid panel. When the result is calculated, the laboratory derives the HDL value from other measured cholesterol results using a specified formula.

How do I prepare for the test?

Follow your clinician’s instructions about fasting. Some lipid panels require fasting, while others do not; water is usually permitted unless you are told otherwise. Avoid unusual heavy alcohol consumption before the test because it can affect triglyceride levels.

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.

◆Associated findings1

Short name

Calculated HDL Cholesterol

Frequently asked questions

Is a high HDL cholesterol result always beneficial?
Higher HDL is generally considered favorable, but it does not cancel the cardiovascular risks associated with smoking, high blood pressure, diabetes, or an unfavorable HDL-to-LDL balance.
What does “calculated” mean?
A calculated result is derived from other measured lipid values using a laboratory formula rather than measured as a separate HDL assay. Your clinician can explain how the value was obtained.
Do I need to fast for this test?
It depends on the instructions for the lipid panel being ordered. Fasting may be required when triglycerides are being evaluated, so follow your clinician’s or laboratory’s specific guidance.
  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