A lab test is pretty simple. With urgent care, you don't need to make an appointment beforehand. The only thing you should remember to do is bring your referral form for the test if you have a form. When you get to the clinic, you'll be asked about your reason for visiting, and soon after that you'll be able to speak with a lab doctor. The doctor will ask you some questions and examine you if necessary, and if you require a lab test, the doctor will proceed with one. The type of test you'll need will depend on the type of condition you may have, like an STD, a kidney issue, or even cancer. The doctor will take a sample of your urine, saliva, or blood, and then test the sample in the clinic's onsite laboratory. It's important to have a lab test done as soon as you can, especially if one was recommended to you by your physician. Urgent care is really quick with no appointment necessary, which is the main reason to get your test done at urgent care!