Immunoglobulin G (IgG) in Urine, Mass Concentration (Nephrogram)

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like frequent urination, swelling, or if they suspect conditions such as kidney disease, immune disorders, or certain infections. It can also be part of a broader evaluation for unexplained protein in urine.

What to Expect Before the Test

No special preparation is needed for this urine test. You may collect a random urine sample in a clean container. If ordered as part of a 24-hour collection, you’ll need to collect all urine over a full day.

What the Test Results Mean

Elevated IgG in urine may indicate kidney problems (such as nephrotic syndrome), immune system activity (like certain infections or autoimmune diseases), or other metabolic conditions. Abnormal results will be discussed with your provider to guide further testing or treatment.

Common Conditions Monitored

This test is often used alongside other urine tests (like proteinuria) to diagnose or monitor conditions such as glomerulonephritis, multiple myeloma, or chronic kidney disease. It helps track how well your kidneys are filtering waste and immune proteins.