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Immunoglobulin M (IgM) Antibody to Human Urinary Protein 24-Hour Collection

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

This test measures the presence of IgM antibodies against a specific urinary protein over a 24-hour period, often used to assess kidney function or detect certain urinary tract conditions.

Quick summary

["Helps identify abnormal protein excretion linked to kidney or urinary system issues."]

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

Key facts at a glance

LOINC
30142-4
Short code
IgM 24h Ur Ql IEP
Synonyms
IgM 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 Is Done

Your doctor may order this test if you have symptoms like frequent urination, blood in urine, swelling in legs/feet, or if they suspect kidney disease, urinary tract infection, or other urinary issues. It helps track how much of a specific protein appears in your urine over time.

What to Expect Before the Test

You’ll collect your urine for 24 hours in a special container. Drink plenty of fluids but avoid foods/drinks that might affect urine color (e.g., cranberry juice). Report any medications or supplements you’re taking to your lab team.

How the Test Works

Your collected urine is analyzed to detect IgM antibodies against a urinary protein. The test measures how much of these antibodies appear in your urine, which can indicate kidney or urinary system health.

Possible Results and Interpretation

Results may show elevated or normal levels of IgM antibodies. Elevated levels could suggest kidney disease, urinary tract infections, or other conditions affecting urine composition. Your doctor will discuss findings with you.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

IgM to Urinary Protein (24h)

Frequently asked questions

What does a positive result mean?
A positive result (elevated IgM antibodies) may indicate kidney issues, urinary tract infections, or other conditions causing abnormal protein excretion. Your doctor will review symptoms and other tests to determine the cause.
Does diet affect this test?
Yes, certain foods (e.g., salt, protein-rich foods) or medications may influence urine protein levels. Follow your doctor’s instructions to avoid interfering substances during your 24-hour urine collection.
How often is this test repeated?
Your doctor may repeat this test if initial results are unclear or to monitor kidney function over time. Frequency depends on your condition and treatment plan.
  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