How long does a urine culture take?
Usually 1 to 3 days, and sometimes up to 4. That’s not the lab being slow. Bacteria have to grow before anyone can count them.
The short version
- Results: most come back in 1 to 3 days. Labcorp quotes 2 to 4 days for its routine culture.
- Why: the sample is placed in a dish and bacteria need 24 to 48 hours to grow. If something grows, the lab then tests which antibiotics kill it, which adds time.
- It’s not the same as a urinalysis. The urinalysis is a quick screen, done in minutes. The culture is the follow-up.
- Medicare: covers it when ordered for a medical reason, such as symptoms of a urinary tract infection. You pay $0. Medicare pays the lab about $8.07.
Why it takes days when a urinalysis takes minutes
A urinalysis checks a sample for signs of infection, such as white blood cells and traces of bacteria. A machine or a dipstick can do that on the spot.
A urine culture answers a harder question: which bacteria, and how many? The lab spreads a bit of your sample on a growth plate and waits. Cleveland Clinic puts it plainly: “Cultures need 24 to 48 hours to grow. It might take up to three days for the lab to complete the test.” If bacteria do grow, the lab usually runs one more step, testing which antibiotics work against that particular germ. That step is what makes the difference between a two-day result and a four-day one.
“Urinalysis with reflex to culture”
You may see this phrase on your order or your bill. It means the lab runs the quick urinalysis first, and only runs the culture automatically if the screen suggests infection. When the screen is clean, no culture is done and you’re not billed for one. When the culture does run, it’s a second test with its own code and its own charge, which is why one urine sample can produce two lines on a bill.
Giving the sample: the “clean catch”
A culture only works if the sample isn’t contaminated by skin bacteria, so labs ask for a clean-catch midstream sample. The steps are simple:
- Wash your hands.
- Clean the area with the wipe the lab gives you.
- Start urinating into the toilet, then move the cup into the stream after a few seconds and collect about a quarter cup.
- Don’t let the inside of the cup touch anything.
No fasting is needed. If the sample is contaminated, the lab may report “mixed flora” and ask for a new one, which starts the clock over. Doing the clean catch carefully is the best way to get a fast, clear answer.
What Medicare pays
A urine culture falls under one of Medicare’s national lab rules (NCD 190.12), so the coverage list is the same in every state. It’s covered when there’s a medical reason on the order, and symptoms of a urinary tract infection are the usual one. When it’s covered, you pay $0. The full coverage rule, the add-on codes, and direct-purchase prices are on the urine culture test page.
| Test | Code | Medicare pays the lab |
|---|---|---|
| Urinalysis (the quick screen) | 81003 | $2.25 |
| Urine culture | 87086 | $8.07 |
Those numbers are worth knowing if a lab ever asks you to sign a payment agreement for a urine test. What to do before you go →
Sources
- Cleveland Clinic: Urine Culture
- Labcorp: Urine Culture, Routine (turnaround 2 to 4 days)
- Kaiser Permanente: Urine Culture (clean-catch instructions)
- Medicare payment amounts: CMS Clinical Laboratory Fee Schedule, 2026 Q3. Coverage: Medicare National Coverage Determination 190.12, Urine Culture, Bacterial
Checked September 23, 2026. This page explains how the test works. It is not medical advice. If you have symptoms, call your doctor.
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