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Mycoplasma Genitalium NAAT Test

The Mycoplasma genitalium test uses a urine sample to detect this bacterium, a sexually transmitted infection that can cause symptoms similar to chlamydia and gonorrhea. Testing identifies the infection so a provider can advise on care.

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Order Mycoplasma Genitalium (MG, Mgen) Urine Test
Typical turnaround
1-3 business days
Starting price
From $198
Results
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Quick answer

The Mycoplasma genitalium test detects the bacterium Mycoplasma genitalium, often shortened to Mgen, in a urine sample. It is a sexually transmitted infection that can cause urethritis and other symptoms, though many people have no signs at all. Testing is used when symptoms suggest it or when a provider wants to check for it directly. A healthcare provider interprets results and advises on next steps.

What this test measures

Mycoplasma genitalium is a small bacterium that infects the urinary and genital tract. It spreads through sexual contact and can cause symptoms such as discharge, burning with urination, or pelvic discomfort. Many infections produce no symptoms, which is one reason testing matters when there is a known exposure or ongoing risk. It is distinct from other mycoplasma species that affect different parts of the body.

The test is usually performed with nucleic acid amplification, which detects the organism's genetic material. A first-catch urine sample is the common collection method, and some providers also use swabs from the genital tract. Because Mycoplasma genitalium can be resistant to certain antibiotics, some laboratories test for resistance markers to guide care.

A positive result means the bacterium was detected and generally indicates an infection that a healthcare provider can address. A negative result lowers the likelihood of infection but can miss very recent exposure because of the window period. Partners may need evaluation as well. Anyone with symptoms or a positive result should speak with a qualified healthcare provider promptly.

  • Mycoplasma genitalium DNA by nucleic acid amplification
  • First-catch urine specimen
  • Genital or rectal swab specimen when collected
  • Macrolide resistance-mediating mutations when offered
  • Fluoroquinolone resistance markers when offered
  • Chlamydia and gonorrhea co-testing when ordered together

Why people order this test

  • Evaluate symptoms such as discharge or burning with urination
  • Check after a known or suspected exposure
  • Investigate persistent urethritis or pelvic symptoms
  • Screen when a partner has tested positive
  • Provide a direct test when other infection results are negative
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How to prepare

A first-catch urine sample is often requested, which means the first part of the urine stream is collected. The laboratory may ask you to avoid urinating for a set period before collection. Follow the specific instructions provided with the order and at the collection site.

Understanding your results

Results are typically reported within one to three business days. A positive result means the bacterium was detected, while a negative result makes infection less likely but may miss very recent exposure. A healthcare provider should review any positive result and discuss follow-up and partner testing.

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Frequently Asked Questions

What is Mycoplasma genitalium?

It is a bacterium that infects the urinary and genital tract and spreads through sexual contact. It can cause symptoms similar to chlamydia or gonorrhea, and many infections cause no symptoms.

How is the sample collected?

A first-catch urine sample is common. Some providers also collect a swab from the genital tract or rectum.

How long until results are ready?

Results are typically available within one to three business days, depending on the laboratory.

Can the test be negative right after exposure?

Yes. Every infection has a window period before it can be detected, so testing too soon after exposure can produce a negative result. A provider can advise on retesting.

Should partners be tested too?

A healthcare provider can advise whether partners should be evaluated, since this infection can pass between sexual partners.

Ready to get tested?

Order online and visit a collection site near you, or choose a mail-in kit. No referral and no insurance required.

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Every page on this site is reviewed for clarity, sourcing, and accuracy. We update our library as testing options, collection networks, and accreditation standards change.

Medical disclaimer. The information on LabOrdering.com is educational only and is not medical advice, diagnosis, or treatment. Reference ranges and clinical guidance vary between laboratories. Always consult a qualified healthcare provider about your own results and care.