Get Immediate Results And Up To 10x Than Other Labs. Oak Crest Medical Lab Services has been serving the south side area for over 25 years as a full service medical laboratory. Our services are used by Physicians, Assisted Living and Individual Patients. Why Use Our Service? - No Appointment or Insurance Needed - No Patient Registration - Laboratory tests that are up to 10X less expensive than other labs in the area - Get same day results while you wait (STAT) - Accept all Medical Insurance - Accept Medicaid