Mycoplasma Genitalium (MG, Mgen) Urine Test Panel

At a glance

Mycoplasma Genitalium (MG, Mgen) Urine Test Panel: prep snapshot

Sample type: Urine sample
Fasting: Fasting is not typically required for a urine test of this kind, but some collection sites may…
Best collection time: Urine for this test can usually be collected whenever the lab is open, though many sites prefer…
Typical turnaround: Varies by collection lab
Category: Sexual Health

Preparing for a Mycoplasma Genitalium (MG, Mgen) Urine Test starts with three questions: whether you need to fast, when to collect, and what to bring. A Mycoplasma genitalium (MG, also called Mgen) urine test checks for a bacterial sexually transmitted infection that can cause symptoms similar to chlamydia and gonorrhea.

What the results reflect

The test looks for evidence of Mycoplasma genitalium bacteria in a urine sample. Results are generally reported as detected or not detected, indicating whether the organism was found. Your lab report may also note whether the specimen was adequate for testing.

Mycoplasma genitalium (MG)
Mgen result status
Specimen adequacy

Mycoplasma Genitalium (MG, Mgen) Urine Test prep, step by step

Expect little to no preparation for this test. Confirm timing or fasting details with the collection site when scheduling, since requirements can vary.

Confirm with the collection lab whether they want a first-catch urine sample or another collection method.
Ask the lab whether they prefer you to hold your urine for a set period before giving the sample.
Avoid urinating immediately before arrival if the lab asks for a concentrated or first-catch specimen.
Hydrate normally unless the lab tells you otherwise; do not over-drink right before collection.
Tell the collection staff about any antibiotics you are currently taking or recently finished.
Bring your test order, photo ID, and insurance or payment information to the appointment.

Fasting, timing, sample type, and what to bring

Fasting

Fasting is not typically required for a urine test of this kind, but some collection sites may have their own instructions, so confirm with your lab.

Best time to collect

Urine for this test can usually be collected whenever the lab is open, though many sites prefer a first-catch sample from the first part of your urinary stream. Ask the lab whether a specific time of day or a period of urine holding is recommended.

Sample type

Urine sample. The collector will explain the process before starting.

What to bring

Your printed lab order or requisition form — the ordering physician prepares it for you after you order, and you print it (or fax it from your account) before visiting
Your order confirmation email, in case the collection site asks to see it
Water to drink before the draw and a light snack for afterward, if your test requires fasting
A government-issued photo ID (most collection sites verify identity at check-in)
A written list of the medications and supplements you currently take
A short-sleeved or loose-sleeved shirt for an easy blood draw

You do not need an insurance card or a payment method at the collection site: the lab does not bill insurance, and you pay at order time, so there is no copay or deductible. The lab also provides the physician's requisition, so you do not need a separate doctor's referral.

Order process and what-to-bring details reflect the lab's published instructions, paraphrased in our own words. Confirm final requirements with the collection lab that will perform your draw.

What happens during the collection visit

You provide a urine specimen in a private collection area, typically into a sterile cup using a first-catch technique if the lab requests it. The sample is then labeled and sent to the laboratory, which reports results in about one to three business days.

Details worth confirming with the collection lab before your visit:

Do you want a first-catch urine sample or a different collection method?
Should I avoid urinating for a certain time before the appointment?
How and when will my results be released to me and my clinician?

Why a clinician may order this test

A clinician orders this test when someone has urinary or genital symptoms that could be caused by Mycoplasma genitalium, or when screening for sexually transmitted infections is appropriate. It also helps distinguish MG from chlamydia and gonorrhea, which can cause similar symptoms.

Your results and next steps

Reference ranges and reporting formats vary by laboratory, and most MG results are given as detected or not detected rather than as a numeric value. Your clinician interprets the result alongside your symptoms, history, and any other tests you had.

General test information is compiled from publicly available reference material, including MedlinePlus (medlineplus.gov) and the Centers for Disease Control and Prevention (cdc.gov), and is reviewed for clarity. Preparation and what-to-bring details reflect the lab's published instructions, paraphrased into our own words. Preparation instructions, timing, and pricing vary by collection lab — always confirm them with the lab that will perform your draw.

Common questions

Frequently asked questions

Do I need to fast before this test?

Fasting is generally not needed for a urine test, but collection sites can differ. Confirm with your lab when you schedule so you follow their instructions exactly.

When will my results be ready?

Turnaround is typically about one to three business days after the lab receives your specimen. Your collection site or clinician can tell you how results will be shared.

Can I give the sample at any time of day?

Many labs accept urine samples throughout the day, and some prefer a first-catch sample. Ask your collection site whether they want you to hold your urine beforehand.

Should I mention antibiotics I am taking?

Yes, tell the collection staff and your clinician about any antibiotics you are taking or recently finished. This information helps them interpret your result correctly.

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