Blood Donor Program

Before you register to be a blood donor, please read the Pre-donation Packet, which contains information about blood donor eligibility.
 

When you arrive to give blood, you'll be asked to show a valid photo ID, such as a driver's license. Please make sure to have one with you. 

We'll also ask for your complete address, including PO Box or street/apartment number. This should be the place you expect to receive mail for up to eight weeks following your donation.  

• Blood donor screening is private and confidential
• You must be 17 years of age, weigh at least 115 lbs. and be healthy*
• Be prepared to answer questions about your health history and any places you have recently traveled
• Your temperature, blood pressure and pulse will be taken
• We'll also perform a simple finger stick to check your hemoglobin levels

*16-year-old donors are eligible but must bring a signed parental consent form, signed in ink. To complete this consent form, click here.  

So you know what to expect, a typical blood donation process will follow these steps:

• You’ll arrive and be seated comfortably in a recliner chair
• A tourniquet will be applied to your arm, making your veins more visible
• The area immediately around the donation site will be cleaned with an antiseptic
• A brand-new sterile needle will be inserted to draw blood
• Blood will be drawn into a collection bag
• If you're also donating platelets, an apheresis machine will be used to separate your blood into separate components
• Once the required amount is collected, the needle will be removed immediately from your arm and pressure will be applied
• A whole blood collection takes 5 to 15 minutes, or 45 to 90 minutes if platelets are donated 

• You'll be given a snack and drink in a designated refreshment area
• You'll be asked to stay for 10 to 15 minutes before leaving
• You'll receive post-donation instructions and contact information for any questions you have afterwards 

Why should I donate blood at Mercy?

At Mercy Hospital St. Louis, we're committed to providing safe and reliable blood donor services to meet growing demand. Our team of trained professionals works to make sure your donation experience is comfortable, convenient and hassle-free.
 

Can I donate blood to a specific family member or friend?

You may also request that your donation be given to a specific patient. Read our Directed Donations Fact Sheet for more information. You'll also need to complete a Directed Donation Request Form.
 

How can I host a blood drive?

It's easy to schedule a blood drive for your school, business, church or group. We'll help you organize the event and bring our mobile technicians to you. To learn more, give us a call at 314-251-4483.
 

What are some common facts about blood?

• Every two seconds, someone in the U.S. needs a blood and/or platelet donation
• 29,000 units of red blood cells are needed every day in the U.S.
• One car accident victim can require as many as 100 units of blood
• Type O is the blood type most often requested by hospitals
• One donation can save more than one life