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Insulin with High-Pressure Liquid Chromatography (HPLC) Measurement of Serum Insulin Levels

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

This test measures the amount of insulin in your blood, a hormone produced by your pancreas that helps regulate blood sugar levels. It’s often used to diagnose or monitor conditions like diabetes or other hormonal imbalances.

Quick summary

["Insulin levels help manage blood sugar and can indicate diabetes or other metabolic disorders."]

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

Key facts at a glance

LOINC
47657-2
Short code
Insulin 1h p Glc SerPl-aCnc
Synonyms
Insulin 1h p Glc SerPl-aCnc
Category
glucose
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
2.6
Ref high
24.9
Fasting
true
Population
adult
Sex
all
Age range
18–65 years
CPT
83525
SNOMED
413618004
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

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms of low or high blood sugar, such as excessive thirst, fatigue, or unexplained weight changes. It’s also used to check insulin production in people with suspected diabetes, insulin resistance, or other endocrine disorders.

How the Test Works

A blood sample is taken from a vein in your arm. The sample is then processed using high-performance liquid chromatography (HPLC), a method that separates and measures insulin molecules with high precision. This helps ensure accurate detection of insulin levels.

Sample Preparation and Testing Process

The blood sample is typically collected in a special tube that prevents clotting. Once collected, it’s sent to a lab where it’s analyzed using HPLC to detect insulin concentration. This method avoids interference from other substances that might affect traditional immunoassay results.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the test if it’s part of a broader metabolic evaluation. Always follow your doctor’s instructions to ensure accurate results.

Reference range

Fasting: 2.6-24.9 μIU/mLN/A

Specimen: serum

No special preparation usually required. Stay well hydrated. Inform your healthcare provider of all medications and supplements you are taking.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Insulin HPLC

Frequently asked questions

What Does an Abnormal Result Mean?
An abnormal result doesn’t diagnose a condition on its own but may prompt further testing, such as glucose tolerance tests or additional hormone evaluations. Your doctor will interpret results in the context of your overall health and symptoms.
Can Diet or Exercise Affect This Test?
Dietary changes, especially around the time of testing, can influence blood sugar and insulin levels. If fasting is required, avoid sugary foods, drinks, or alcohol before your appointment. Exercise may also temporarily affect insulin sensitivity, so timing your test carefully is important.
How Often Should This Test Be Done?
Frequency depends on your health condition. People with diabetes may need regular monitoring, while others may only require testing if symptoms or risk factors change. Your doctor will determine the best schedule for you.
  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