Skip to content

LDL Cholesterol, Serum/Plasma — Electrophoresis, Arbitrary Concentration

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

This blood test measures LDL cholesterol using electrophoresis. It is used to help assess cardiovascular risk and may be reviewed with other cholesterol results.

Quick summary

["This test measures LDL, often called “bad” cholesterol, to help evaluate the risk of fatty plaque buildup in the arteries."]

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

Key facts at a glance

LOINC
12773-8
Short code
LDLc SerPl Elph-aCnc
Synonyms
LDLc SerPl Elph-aCnc
Category
lipid
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
0
Ref high
100
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
electrophoresis
CPT
83721
SNOMED
113079007
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 amount of LDL cholesterol in a blood sample. LDL is commonly called “bad” cholesterol because higher levels can contribute to fatty plaque buildup in the arteries.

Why might I need this test?

You may need this test to help assess your risk of heart disease and stroke, especially if you have high cholesterol, heart disease, diabetes, or other risk factors. Your clinician may also use it to monitor cholesterol-lowering treatment.

How is the test performed?

A blood sample is separated into serum or plasma, and the cholesterol in LDL particles is measured using electrophoresis. The result is then interpreted along with your other cholesterol levels, medical history, and risk factors.

How do I prepare for the test?

Fasting is often not required, but follow any instructions from your clinician. Tell the laboratory if you are pregnant, have recently changed cholesterol medication, or have eaten unusually large or high-fat meals before the test.

Reference range

Optimal: <100 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

LDL Cholesterol by Electrophoresis

Frequently asked questions

Do I need to fast before this test?
Fasting is not always required, but your clinician may request it for a complete cholesterol evaluation. Follow the specific instructions provided with your test order.
Why is LDL cholesterol called bad cholesterol?
LDL can contribute to cholesterol buildup in artery walls. When this buildup narrows or blocks an artery, it can increase the risk of heart attack or stroke.
How is this result different from a standard LDL test?
This test uses electrophoresis to measure LDL cholesterol, while many standard lipid panels use a different laboratory method. The methods can produce slightly different results, so your clinician should interpret this test with the rest of your lipid panel.
  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