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Upcoming holiday closures 

Quest Patient Service Centers will be closed on Friday, July 3 and Saturday, July 4, 2026, in observance of Independence Day, and to give our frontline team the time to recharge. Don't let the holiday interrupt your care. Plan your visit today.

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Baltimore, MD licensure

Quest Diagnostics Inc.
1715 Twin Springs Rd., Baltimore, MD 21227

LicensesExpiresLicense/Permit #
CAP
04-25-281345001
CLIA10-19-2621D0218877
MarylandNon-Expiring129
New York06-30-269559
Pennsylvania08-15-2621422A