Immunoglobulin G (IgG) 24-Hour Urinary Excretion
This test measures the amount of Immunoglobulin G (IgG), a type of antibody found in your urine, over a 24-hour period. It helps assess how much IgG your body is excreting through urine.
["IgG in urine can indicate kidney function or certain immune system conditions."]
Key facts at a glance
- LOINC
- 30141-6
- Short code
- IgG 24h Ur Ql IEP
- Synonyms
- IgG 24h Ur Ql IEP
- Category
- chemistry
- Sample
- urine
- Container
- Sterile urine container
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- immunoelectrophoresis
- 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 This Test Might Be Done
Your doctor may order this test if they suspect conditions like IgA nephropathy (a type of kidney disease), certain immune disorders, or to monitor kidney function in people with high IgG levels in blood. It can also help diagnose or track kidney-related issues where IgG might be unusually present in urine.
What to Expect Before the Test
No special preparation is needed for this test. You’ll provide a 24-hour urine sample collected over a full day, typically starting after you urinate in the morning of the first day. Store the sample according to your healthcare provider’s instructions to preserve accuracy.
How the Test Works
The test measures the total IgG concentration in your urine over 24 hours. IgG is an antibody protein that your immune system produces to fight infections. In urine, elevated levels may suggest kidney issues or abnormal immune activity.
What the Results Mean
Results are compared to expected ranges for a healthy individual. High IgG in urine may signal kidney problems, such as IgA nephropathy, or other conditions affecting how your body filters waste. Low levels might indicate normal excretion or conditions affecting antibody production.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
IgG Urine Test
Frequently asked questions
What are the normal reference ranges for this test?
Can high IgG in urine be treated?
Does diet affect IgG levels in urine?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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