Effective November 19, 2025
Corewell Health Laboratory is transitioning to Quest Diagnostics as our primary reference testing laboratory. This change means that nearly all referral and send-out tests will now be performed by Quest Diagnostics. A limited number of tests will continue to be sent to other laboratories to ensure we meet the needs of our patients and clinicians.
What You Need to Know:
- Test Crosswalks: Tests currently performed at ARUP and Mayo Clinic Labs will be matched to comparable tests at Quest Diagnostics.
- Discontinued Tests: Tests with low utilization or those no longer deemed clinically necessary will be discontinued.
- New LAB Numbers: All tests will receive new LAB numbers, which must be updated in your EMR compendium if interfaced.
- Collection Devices: Some tests may require different collection devices.
- Transition Timeline:
- November 19, 2025: Focus on tests currently referred to ARUP.
- December 17, 2025: Focus on tests currently referred to Mayo Clinic Labs.
- Crosswalk Resources: Crosswalks between current and future test offerings will be provided to help you prepare.
- Test Directory Access: Please refer to your regional Lab Test Directory for details on specific test changes. ARUP and Mayo Clinic Lab test pages will include links to the corresponding Quest Diagnostic tests.
We understand the significance of these changes and are committed to supporting your practice throughout this transition. Updates and modifications will be communicated promptly.
Contact Information:
- Corewell Health East Sendouts: 248.551.9045
- Corewell Health West Referrals: 616.267.2753
- Or use the Contact Us link above.