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Insulin, mass concentration (serum/plasma)

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

This test measures the amount of insulin, a hormone produced by the pancreas, in your blood. It helps assess how well your body is regulating blood sugar levels.

Quick summary

["Insulin helps control blood sugar and is important for energy balance."]

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

Key facts at a glance

LOINC
47653-1
Short code
Insulin 10M p Gc SerPl-aCnc
Synonyms
Insulin 10M p Gc SerPl-aCnc
Category
hormone
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
2.6
Ref high
24.9
Fasting
false
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 Is This Test Done?

Your doctor may order this test to check for conditions like diabetes, insulin resistance, or hypoglycemia (low blood sugar). It can also help diagnose or monitor pancreatic issues, such as tumors or autoimmune disorders that affect insulin production.

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 glucose tolerance or metabolic evaluation. Bring any medications you’re taking to your appointment.

How the Test Works

A blood sample is drawn from a vein, typically in your arm. The sample is sent to a lab where it’s analyzed using a specialized immunoassay method to measure insulin concentration.

What the Results Mean

Results are interpreted based on your overall health, symptoms, and other test results. High insulin levels may suggest insulin resistance or other metabolic conditions, while very low levels could indicate problems with insulin production.

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.

Clinical Significance

Short name

Insulin Level

Frequently asked questions

How often should I get this test?
This test is often done as part of a broader evaluation, such as during diabetes screening, pregnancy monitoring, or if you have symptoms like unexplained weight changes, fatigue, or frequent infections.
What if my results are out of the expected range?
Your doctor will discuss your results in detail and may recommend further testing or adjustments to your treatment plan if needed. Always follow their guidance rather than interpreting results independently.
Can diet or exercise affect insulin levels?
Yes, diet and exercise can influence insulin levels. Eating a balanced diet, managing portion sizes, and staying physically active can help regulate blood sugar and insulin production.
  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