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Immunoglobulin G (IgG) in Urine, Mass Concentration

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

This test measures the amount of Immunoglobulin G (IgG), a type of antibody found in your urine. IgG helps fight infections and is normally present in small amounts in urine.

Quick summary

["IgG in urine can help diagnose or monitor certain conditions affecting your immune system or kidneys."]

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

Key facts at a glance

LOINC
56121-7
Short code
IgA Ur-mCnc
Synonyms
IgA Ur-mCnc
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why Might This Test Be Ordered?

Your healthcare provider may order this test if you have symptoms like frequent infections, kidney issues, or unexplained protein in your urine. It can also help check for conditions like multiple myeloma or other immune disorders.

What Does a High or Low IgG Level Mean?

High levels of IgG in urine might suggest kidney problems or certain immune system conditions. Low levels could indicate immune deficiencies or other health concerns, though urine IgG alone is less commonly evaluated for this purpose.

How Is This Test Performed?

A small urine sample is collected, usually during a routine urine test. The sample is then analyzed in a lab to measure the IgG concentration.

What Are Common Causes of Abnormal Results?

Abnormal IgG levels in urine may be linked to kidney diseases (such as nephrotic syndrome), immune system disorders, or rare blood disorders. Always discuss results with your doctor to understand the full context.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

IgG in Urine

Frequently asked questions

What does it mean if my IgG urine test is abnormal?
Abnormal results may indicate underlying kidney or immune system issues. Your doctor will review your symptoms, medical history, and other test results to determine the cause and next steps.
Can I prepare for this test?
No special preparation is needed for this test. You may collect a random urine sample at any time of day, unless instructed otherwise by your provider.
How long will it take to get my results?
Results are typically available within 1–3 business days, depending on your lab. Follow up with your healthcare provider to discuss the findings.
  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