Testing Locations » California » Riverside CA » Ironstone Medical Clinic – Ironstone Medical Clinic – Drug Testing Only (Preferred) Ironstone Medical Clinic – Ironstone Medical Clinic – Drug Testing Only (Preferred) Ironstone Medical Clinic – Ironstone Medical Clinic – Drug Testing Only (Preferred)4121 Brockton AvenueSuite #104Riverside, CA 92501-3442 United States