Urinalysis: What a Urine Test Reveals About Your Health

What Is a Urinalysis?

A urinalysis is a urine test that checks for a range of health signals. It has three main parts: a visual check of how the urine looks, a chemical dipstick that tests for substances such as protein and glucose, and a microscopic exam that looks at cells, crystals, and bacteria. Together these parts give a broad snapshot of kidney and urinary health.

Because urine is a filtered body fluid, changes in it can reflect problems in the kidneys, the urinary tract, or metabolism. A urinalysis is often the first test ordered when a clinician suspects a urinary infection, kidney disease, or a metabolic condition such as diabetes.

The test is quick, painless, and inexpensive. It is commonly bundled with a complete blood count or a metabolic panel for a fuller picture.

What Each Part of a Urinalysis Measures

• Appearance: clear to pale yellow is typical. Cloudy or dark urine can suggest infection, dehydration, or blood.
• pH: normal urine is slightly acidic, often in the range of 4.5 to 8.
• Specific gravity: about 1.005 to 1.030, a measure of how concentrated the urine is.
• Protein: normally absent or trace; higher levels can hint at kidney stress.
• Glucose and ketones: normally absent; presence can relate to diabetes or fasting.
• Blood: normally absent; may point to infection, stones, or injury.
• Leukocyte esterase and nitrite: markers often seen with a urinary tract infection.
• Microscopy: checks for red cells, white cells, bacteria, and crystals.

What Urinalysis Results Mean

Normal ranges vary by laboratory and by sample. A clean sample usually shows no protein, glucose, blood, nitrite, or leukocyte esterase.

A single abnormal finding is rarely a diagnosis. A trace of protein can follow exercise or a fever, and a small amount of blood can come from many sources. Results are read with your symptoms and with blood tests such as creatinine and eGFR.

Why a Urinalysis Is Ordered

A urinalysis is ordered to:

• Check for a urinary tract infection
• Screen for kidney disease, especially with diabetes or high blood pressure
• Investigate blood in the urine or painful urination
• Monitor a known kidney or bladder condition
• Screen during pregnancy or before surgery

How to Order a Urinalysis and Where to Get Tested

You can order a urinalysis without a doctor's visit in most US states. Online lab-testing directories let you select the test, pay, and download a requisition. You then visit a CLIA-certified lab or one of our partner lab locations to provide a urine sample, usually on a walk-in basis.

1. Choose a urinalysis or a panel that includes it.
2. Pay online and print your requisition.
3. Visit a nearby walk-in testing site and give a clean-catch sample.
4. View results in a secure portal, often within one to two business days.

A clean-catch sample means you clean the area first and collect urine midstream, which reduces contamination.

How Much Does a Urinalysis Cost?

A urinalysis commonly costs between about $15 and $40 through a direct-access lab. A panel that adds a urine culture or a kidney function blood test usually runs $50 to $120. Insurance may cover testing when a clinician documents a medical reason.

Preparation and What to Expect

No fasting is needed for a urinalysis. Drink water normally so you can provide a sample. Avoid heavy exercise and certain foods the day before, since both can affect color and chemical results. Tell the lab if you are menstruating or taking a diuretic.

Collect the midstream portion into the cup the lab provides. Results are usually ready within one to two days, and a positive infection screen may lead to a urine culture for confirmation.

Sample quality matters. A sample that is not clean-catch can pick up skin cells and bacteria and lead to a misleading result, so follow the collection steps the lab provides. Menstrual blood can also show up as blood or protein in the urine, so tell the lab if you are menstruating.

If the dipstick suggests an infection, a clinician may order a urine culture to confirm it and identify the organism. If protein or blood persists on repeat tests, kidney imaging or a referral may follow. A single abnormal urinalysis is a prompt for follow-up, not a diagnosis.