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Immunoglobulin M (IgM) Anti-Urinary Protein (Urine)

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

This test measures antibodies (specifically IgM) that may react with proteins found in urine, potentially indicating kidney or urinary tract issues.

Quick summary

["This test helps check for possible urinary tract or kidney problems by detecting unusual antibody responses to urine proteins."]

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

Key facts at a glance

LOINC
18304-6
Short code
IgM Ur Ql IFE
Synonyms
IgM Ur Ql IFE
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
immunofixation
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 Is Done

Your healthcare provider may order this test if you have symptoms like frequent urination, pain during urination, blood in urine, or if tests suggest kidney problems. It can also be part of a broader evaluation for conditions like glomerulonephritis or other immune-related urinary issues.

What to Expect Before the Test

No special preparation is needed. You’ll likely provide a urine sample in a clean container. Follow any instructions from your lab about timing (e.g., first morning urine) or avoiding certain foods/drinks.

What the Test Results Mean

Results may show elevated or normal levels of IgM antibodies reacting with urine proteins. Elevated results could signal an immune response affecting the urinary system, but interpretation depends on clinical context and other test results.

Possible Causes of Abnormal Results

Positive results may be linked to conditions like glomerulonephritis, urinary tract infections, or autoimmune diseases affecting the kidneys. False positives can occur with certain medications or infections.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

IgM Anti-Urinary Protein (Urine)

Frequently asked questions

What does a positive result mean for my health?
A positive result suggests your immune system may be reacting to urine proteins, which could indicate an underlying issue like inflammation in the kidneys or urinary tract. Your doctor will discuss this with you and may recommend further testing or treatment.
Can diet or medications affect this test?
Some foods or medications (like NSAIDs) might influence urine protein levels, but IgM antibody response is less affected. Follow your doctor’s advice about timing your sample and avoiding potential disruptors.
Is this test painful or uncomfortable?
No, this is a simple urine sample test—like a routine urine dipstick or collection. It’s quick and doesn’t require needles or special equipment.
  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