Mercy Laboratory Services - W. Main

1216 W. Main Street
Festus, MO 63028
Fax: (636) 937-3660
Services are provided by Mercy Hospital South Learn more »
Hours of Operation:
Monday-Friday: 7 a.m. - noon
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Holidays may affect operations, please call Client Services at 314-251-6850 for hours.

Mercy South Laboratory Services offers a full range of lab testing services; more than 5,000 tests to screen for diseases, confirm diagnoses and monitor drug therapy. Laboratory test results are immediately transmitted to your physician’s office.

In addition, we also provide health screens to promote wellness and reduce health risks in the community.

Accreditations and Certifications

Every Mercy South laboratory is:

  • Accredited by the College of American Pathologists (CAP) and The Joint Commission
  • Registered with the Food and Drug Administration (FDA)
  • Certified under the Clinical Laboratory Improvement Amendments of 1988 (CLIA) program