Effective March 4, 2026, an Antiphospholipid Antibody Panel will be available for adult patients in the emergency, observation, and inpatient settings across the Corewell Health System.
Corewell Health System, Emergency, Inpatient
Browsing Tag
Test Update
Go-Live Date: December 17, 2025
Following Phase One in November, where tests previously referred to ARUP and some Mayo Clinic Lab tests were transitioned to Quest Diagnostics, we are now moving into Phase Two of this important change. Corewell Health Laboratory is continuing its transition to Quest Diagnostics as our primary reference testing partner.
The following information was updated in the Lab Catalog.
All changes are for Corewell Health Laboratories in Southwest and West Michigan. For Laboratories in Southeast Michigan, please visit:corewellhealth.org/labcatalog and navigate to the Southeast Michigan site.
The following information was updated in the Lab Catalog.
All changes are for Corewell Health Laboratories in Southwest and West Michigan. For Laboratories in Southeast Michigan, please visit:corewellhealth.org/labcatalog and navigate to the Southeast Michigan site.
Referral/Sendouts, Southeast Michigan, Southwest Michigan, West Michigan
Primary Reference Lab Change to Quest Diagnostics
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.
General Information, Southwest Michigan, West Michigan
Specimen Collection and Test Updates – August 2025
The following information was updated in the Lab Catalog.
All changes are for Corewell Health Laboratories in Southwest and West Michigan. For Laboratories in Southeast Michigan, please visit:corewellhealth.org/labcatalog and navigate to the Southeast Michigan site.
Effective Date: September 3, 2025
The MRSA Screen PCR [LAB1231076] detects the presence or absence of colonization with methicillin-resistant Staphylococcus aureus (MRSA) and may be used to guide antimicrobial prophylaxis decisions. To improve and standardize test utilization across all Corewell Health regions, the following restrictions will be added to this test order:
- Ordering will be restricted to one test every 7 days.
- An indication for ordering must be provided for each order. Acceptable indications are:
- Pneumonia
- Skin and soft tissue (use for non-purulent infections)
- Surgical prophylaxis
Studies have shown that there is minimal utility in re-testing within 2 weeks as MRSA conversion rates are low and the PCR negative predictive values remain high for at least 14 days after initial testing.
Absence of nasal colonization with MRSA cannot be used to reliably rule out MRSA infection in scenarios other than those listed above.
Test Information
The following information was updated in the Lab Catalog.
All changes are for Corewell Health Laboratories in Southwest and West Michigan. For Laboratories in Southeast Michigan, please visit: corewellhealth.org/labcatalog and navigate to the Southeast Michigan site.
Effective Wednesday, July 30, 2025, changes to result reporting will be implemented across all Hematology Departments at Corewell Health Laboratories. These updates will help align all regions within Corewell Health Hematology Departments to provide a high-quality and standardize patient care experience.
The following are the most impactful changes for the Corewell Health West Michigan Region:
Effective July 30, 2025, PD-L1 testing will be performed at Corewell Health Reference Laboratory East and will no longer be a sendout to Neogenomics. Collection instructions and other information may have changed, please visit the lab catalog for more information.
For questions and inquiries, please use the “Contact Us” link above.
TEST INFORMATION
New test: PD-L1 [LAB3658]
Former test: PD-L1 to Neogenomics (LAB848)