Mercy Laboratory Services - Richardson Square

3619 Richardson Square
Arnold, MO 63010
Fax: (636) 464-6755
Services are provided by Mercy Hospital South Learn more »
Hours of Operation:
By appointment only. Please call to schedule.
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We’re pleased to announce that St. Anthony's Arnold Laboratory Services joined Mercy Clinic effective October 1, 2018. This is an exciting time for our organizations and for health care in the St. Louis area. All participating St. Anthony’s providers, co-workers and office locations will be integrated into Mercy to provide expanded services and better coordination of your care and wellness.

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