Skip to content

Insulin Receptor Antibody (Serum) – Qualitative

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

This test checks for antibodies that may interfere with insulin’s ability to work properly in your body, which could affect how your cells respond to insulin.

Quick summary

["This test helps rule out rare conditions where the body’s immune system mistakenly attacks insulin receptors."]

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

Key facts at a glance

LOINC
31439-3
Short code
Insulin Recep Ab Ser-aCnc
Synonyms
Insulin Recep Ab Ser-aCnc
Category
coagulation
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
0.8
Ref high
1.2
Critical range
— – 5 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
85610
SNOMED
396252006
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 Might Be Ordered

Your doctor may recommend this test if you have unexplained symptoms like weight changes, fatigue, or signs of insulin resistance despite normal blood sugar levels. It’s also used in cases where other tests for diabetes or metabolic disorders don’t fully explain your condition.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. The test involves a simple venipuncture, and you may feel a slight pinch. If you’re on blood thinners, let your doctor know before the test.

What the Results Mean

Positive results indicate the presence of insulin receptor antibodies, which may suggest an autoimmune condition affecting insulin function. Negative results mean no such antibodies were detected, but other causes of your symptoms should still be investigated.

Common Causes and Conditions

This test is primarily used to diagnose or investigate rare autoimmune disorders linked to insulin receptor antibodies, such as insulin resistance syndromes or unexplained metabolic disturbances. It’s not typically used for routine diabetes screening.

Reference range

INR: 0.8-1.2 (warfarin: 2.0-3.0)N/A

Specimen: serum

Inform your healthcare provider if you are taking blood thinners. No special preparation required.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Insulin receptor antibody (serum)

Frequently asked questions

What does a positive result mean for my health?
A positive result suggests your immune system may be attacking insulin receptors, which could impair how your body uses insulin. This may require further evaluation by an endocrinologist or specialist to determine the best treatment plan, which might include monitoring blood sugar closely or exploring therapies to manage insulin resistance.
Can this test replace other diabetes-related tests like HbA1c?
No, this test is not a replacement for standard diabetes tests like HbA1c. It’s a specialized test to identify antibodies that may affect insulin function, but it doesn’t measure blood sugar levels directly. Your doctor will use this alongside other tests to guide diagnosis and treatment.
How often should I get this test?
This test is usually ordered as part of a specific evaluation, not as a routine check. Your doctor will determine if retesting is needed based on your symptoms, medical history, and other test results.
  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