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Myoglobin in Urine (Quantitative)

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

This test measures the presence of myoglobin, a protein found in muscle cells, in your urine. It can help identify muscle damage or injury.

Quick summary

Myoglobin in urine helps detect muscle injuries or damage quickly.

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

Key facts at a glance

LOINC
102118-7
Short code
Rhabdo + Metab myopathy mlgn pnl Bld/T
Synonyms
Rhabdo + Metab myopathy mlgn pnl Bld/T
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
molgen
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your healthcare provider may order this test if you have symptoms like muscle pain, weakness, or cramping, especially after physical activity or trauma. It can also be used to monitor conditions affecting muscle function or rule out conditions like rhabdomyolysis (severe muscle breakdown).

What Does a Positive Result Mean?

Elevated levels of myoglobin in urine may indicate muscle tissue damage. High levels can sometimes lead to kidney problems, so it’s important to follow up with your doctor if results are abnormal.

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 myoglobin concentration.

What Are Common Causes?

Common causes include intense exercise, muscle injuries (like strains or fractures), certain medications, or conditions like myasthenia gravis or muscular dystrophy.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Myoglobin in Urine

Short name

Urine Myoglobin

Frequently asked questions

Myoglobin is a protein released when muscle cells break down. While small amounts are normal, large amounts can signal serious muscle damage. Early detection helps prevent complications like kidney damage, which can occur if myoglobin builds up in the kidneys.
This test is often used alongside other blood tests (like creatine kinase) to assess muscle injury. If you have symptoms like dark urine or extreme fatigue, let your doctor know right away.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on your lab’s processing time. Your doctor will discuss the findings with you during your follow-up visit.
Can I take anything special before this test?
No special preparation is needed. You may drink water as usual, but avoid excessive exercise or muscle-strenuous activities 24 hours before testing if you suspect muscle damage.
  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