621 S New Ballas Rd, Suite 23

Saint Louis, MO 63141

Phone
(314) 610-5793
Fax
(314) 983-9298
Last updated
July 2, 2026
Quest Diagnostics

Step into Mercy Medical Tower A at 621 South New Ballas Road, Suite 23 in Saint Louis, Missouri, to reach this Quest Diagnostics patient service center. Open six days a week, it sits within the network of 2,000+ Quest draw locations that Superpower partners with for blood testing across the country.

Get directions →
Monday
6:30 AM – 5:00 PM
Tuesday
6:30 AM – 5:00 PM
Wednesday
6:30 AM – 5:00 PM
Thursday
6:30 AM – 5:00 PM
Friday
6:30 AM – 5:00 PM
Saturday
8:00 AM – 5:00 PM
Sunday
Closed
4.6 out of 5260+ reviews

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