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Frequently Asked Questions


Do I need to fast before my blood tests?

You need to fast if your doctor has ordered a fasting test. This means that you cannot eat anything and may only drink clear water for 12-14 hours prior to your test. You should continue to take your medications, unless otherwise instructed by your doctor. Some common fasting tests include: fasting glucose, fasting lipid panel, fasting metabolic panel, fasting cholesterol, HDL or triglyceride. If you are uncertain about whether or not you should fast, please contact your health care provider.

I did not fast for a fasting test. Can I have my blood drawn anyway? 

Because certain test results may be influenced by what you eat or drink, we prefer that you do not have your blood drawn if your tests were ordered as fasting. 

How can I learn more about lab tests?

It is always recommended that you speak with your health care provider regarding your tests and test results.

Do I need an appointment for lab tests?

No, you do not need to make an appointment.

What do I need to bring to patient registration and the lab for my blood draw?

Please bring your insurance card, your picture identification (ID), and your doctor’s lab test orders.

Learn More About Our Laboratory Services

For more information on Saint Francis laboratory services, please call 415.353.6333.