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LDL Cholesterol, Serum/Plasma — Qualitative Electrophoresis

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

A qualitative electrophoresis-based test that evaluates LDL cholesterol in a serum or plasma sample as part of an assessment of blood lipids.

Quick summary

["This test helps characterize the LDL cholesterol pattern in your blood and is interpreted alongside your other lipid results and cardiovascular risk factors."]

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

Key facts at a glance

LOINC
48637-3
Short code
LDLc BI SerPl Ql Elph
Synonyms
LDLc BI SerPl Ql Elph
Category
lipid
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
0
Ref high
100
Critical range
7.2 N/A – 7.6 N/A
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 is a qualitative laboratory test that uses electrophoresis to evaluate LDL cholesterol in serum or plasma. Electrophoresis separates lipoproteins so their pattern can be assessed.

Why might I need this test?

Your clinician may order this test to characterize LDL and other lipoprotein patterns, particularly when standard cholesterol results, family history, or cardiovascular risk factors suggest the need for additional evaluation.

How is the test performed?

A blood sample is collected, and the serum or plasma portion is analyzed using electrophoresis. The laboratory reports the LDL pattern or fraction identified rather than relying only on a standard calculated LDL value.

How do I prepare for the test?

Fasting is generally not required for this test unless your clinician specifically requests it. Follow any fasting or medication instructions provided with your order, and tell the laboratory if you have recently changed cholesterol-lowering treatment.

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 Electrophoresis

Frequently asked questions

Does this test measure the same LDL value as a standard lipid panel?
Not necessarily. Standard lipid panels often calculate LDL cholesterol from other measured lipids, while electrophoresis evaluates the pattern of LDL and related lipoprotein fractions.
Do I need to fast before this test?
Fasting is usually unnecessary, but your clinician may request it in certain circumstances. Follow the specific preparation instructions included with your laboratory order.
Can this test alone determine my heart disease risk?
No. Your clinician will interpret this result with blood pressure, other cholesterol measurements, diabetes status, smoking, family history, and other cardiovascular 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