Creatinine Random Urine Test
Below is a plain-language overview of the creatinine random urine test. A creatinine random urine test measures the amount of creatinine in a single urine sample. Creatinine is a waste product from normal muscle activity that healthy kidneys filter out. It is often ordered to help assess kidney function or to compare urine creatinine with another substance, such as protein.
- Sample type
- urine
- Category
- Kidney
- Turnaround
- 1-3 business days
- Price
- $45
- Referral
- Not required
A creatinine random urine test measures the amount of creatinine in a single urine sample. Creatinine is a waste product from normal muscle activity that healthy kidneys filter out. It is often ordered to help assess kidney function or to compare urine creatinine with another substance, such as protein.
What it measures
- Creatinine — The main substance measured; it reflects how well the kidneys are filtering waste.
- Creatinine concentration — The amount of creatinine in the sample, reported in milligrams per deciliter (mg/dL).
- Creatinine-to-substance ratio — Sometimes calculated with protein or another marker to adjust for urine concentration.
- Urine protein (if included) — May be measured alongside creatinine to check for protein leaking into urine.
Who it is for
A clinician may order this test when checking kidney health, monitoring a known kidney condition, or evaluating an abnormal result from another urine or blood test. It is also used to help interpret other urine measurements.
Preparation
No fasting or special preparation is usually required. A random sample means you provide urine at any time, often during a routine visit.
Results and what they mean
Results are reported as a creatinine level in the urine sample, sometimes with a ratio to another substance. Your clinician interprets the number along with your history, symptoms, and other tests. This is general information only and not medical advice; discuss your results with a qualified healthcare professional.
How to order this test
- Choose the test and place a confidential order online.
- Select a certified collection site and pick a time that suits you.
- Have your specimen collected — most draws take only a few minutes.
- Review results in a secure portal, typically within 1–3 days.
Preparation, hours, and pricing vary by site; confirm details directly with the lab before your visit.
Availability by state
Direct-access online ordering for the creatinine random urine test is available in most states. It is currently unavailable in 6 states:
Everywhere else you can order confidentially and collect your sample at a certified site. Browse by state →
Frequently asked questions
Is this test the same as a blood creatinine test?
No. This test measures creatinine in urine, while a blood creatinine test measures it in blood. They give different information and may be used together.
Do I need to collect urine for 24 hours?
No. This is a random test, so a single sample is enough. A 24-hour collection is a different test.
What can affect my urine creatinine level?
Muscle mass, diet, hydration, exercise, and some medicines can affect it. Tell your clinician about anything that might apply to you.
Can I get the result without seeing a clinician?
The report gives a number, but it needs context. A clinician can explain what it means for your health.