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quest diagnostics

Corewell Health System, Diagnostic Lab of Michigan

Diagnostic Lab of Michigan Update

Building the Future of Diagnostic Laboratory of Michigan

Since launching in January 2026, Diagnostic Lab of Michigan (DLM) has moved from organizational formation to active implementation. Corewell Health and Quest Diagnostics teams are advancing the facility, technology and operational work needed to support the new laboratory model.

Where We’re Building: Southfield Laboratory Transformation

Construction is underway on the new Southfield 100,000‑square‑foot laboratory following completion of major design and permitting activities. Planning has also begun for equipment installation and operational activation. The facility remains on track for a Q1 2027 go‑live. Once completed, the Southfield laboratory will have state‑of‑the‑art equipment and technology supporting the most advanced testing at the highest levels of quality and efficiency for fast, accurate results. The pathologists you currently work with will be the pathologists that provide medical services for our Corewell Health patients within Diagnostic Lab of Michigan.

What We’re Building: Technology & Integration

Teams are advancing laboratory information technology, connectivity, interfaces and test-menu alignment. Physicians will continue to place laboratory orders and receive results in the Corewell instance of EPIC.  As an organization, Quest is in the process of converting all laboratories from Q-Suite to EPIC Beaker by 2030. At go-live, DLM will also utilize Q-Suite, but will transition to EPIC Beaker along with the rest of Quest Diagnostics’ Greater Midwest Region in the following years. For outreach laboratory orders there will be minimal changes in EPIC functionality and clinical workflows. The physician advisory committee is engaging clinical stakeholders to help design future workflows, training for physicians, and the optimal laboratory service experience. Looking forward, this group will be evaluating differences in views for lab specimen status changes, how cancelled orders are communicated and other anticipated minor workflow changes.

How We’re Preparing: Operational Readiness

To prepare for delivering high-quality, patient-centered laboratory services, our cross-functional teams are developing:

• Workforce and staffing plans
• Specialty laboratory services
• Operational workflows and processes
• Service and migration plans

This work is intended to support safe, reliable laboratory services and continuity of care, creating a sustainable operating model that supports patients, physicians, clinicians and communities across Michigan.

Looking Ahead: Migration & Go-Live Preparedness

As DLM continues to take shape, the organization will continue advancing its brand identity, mission, vision, and market presence while preparing for future implementation milestones.

DLM has established a phased migration strategy for moving clients, systems and services into the new environment. The phased approach is designed to maintain operational stability and minimize disruption for physicians, clinicians, patients and team members.

Additional communications will be shared in the months ahead to help physicians, clinicians, and team members to provide more visibility into when testing moves into the laboratory and to prepare for upcoming process and workflow changes.

Southwest Michigan, West Michigan

Testosterone Testing and Ordering Recommendations

Effective March 4, 2026, Corewell Health Laboratories in West Michigan will discontinue performing testosterone testing (LAB173 and LAB2111222) and Corewell Health Southwest Michigan will discontinue Testosterone Free and Total testing (LAB173)

The following replacements will be available as a send out to Quest Diagnostics:

Testosterone, Total, MS – Epic Code: LAB1232313

Testosterone, Free, Bioavailable and Total, MS – Epic Code: LAB1232237 Continue Reading

Corewell Health System, Referral/Sendouts

Collection Update: Cortisol Saliva

As part of our ongoing transition to Quest Diagnostics as our primary reference laboratory, an update has been made to the saliva collection device used for cortisol testing.

Quick Reference

Test: Cortisol, LC/MS, Saliva [Epic: LAB1232015, Interface: 1232015]
Approved Device: BLUE TOP Salivette® Cortisol Tube
Previously Accepted: White top tube
Status of White Top Tubes: No longer accepted – will be rejected
Action: Discard or return white top tubes and reorder blue top tubes via your supply form

Continue Reading

Corewell Health System, Diagnostic Lab of Michigan, Southeast Michigan, Southwest Michigan, West Michigan

Update on Corewell Health and Quest Diagnostics Joint Venture

Dear Valued Client:

We are pleased to announce that Corewell Health and Quest Diagnostics, a leading national laboratory company, have completed the formation of their laboratory services joint venture (JV) named Diagnostic Lab of Michigan, LLC.

This multifaceted collaboration will broaden access to innovative, high-value laboratory services for you and other providers in Michigan. Excitingly, work has begun on a new state-of-the-art laboratory in Southfield, Michigan, to service the JV. This laboratory will not be operational until the beginning of 2027. We will provide updates on the laboratory start date as work progresses.

Improving Access to Diagnostic Innovation in Michigan Over Time

Corewell Health and Quest Diagnostics share the goal to broaden access to quality, accessible and affordable laboratory services for providers and patients in Michigan. We expect Diagnostic Lab of Michigan to concentrate the shared resources and expertise of Corewell Health and Quest Diagnostics on improving access to diagnostic innovation in Michigan.

Over time, Diagnostic Lab of Michigan will provide several new benefits, including:

• Greater convenience for patients, as Corewell Health and Quest Diagnostics combine their patient service networks to reach more patients in Michigan.
• Michigan-grown diagnostic innovation, including through automation in the new laboratory.
• Broad health plan access to support patient affordability.

Your current Corewell Health Lab Account Representative will continue supporting you as part of the new joint venture laboratory. If you have questions, please contact Matt Boring, Sales Director, 248-345-5604.

We appreciate your business and look forward to the continuation of high-quality laboratory services for our patients, providers and communities.

Sincerely,

Sarah Britton
Vice President, Laboratory Services
Corewell Health

Corewell Letter to Clients Close

Corewell Health System, Diagnostic Lab of Michigan, Referral/Sendouts

Send Out Referral Testing Update: Phase Two Transition to Quest Diagnostics

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.

Continue Reading

Corewell Health System, Diagnostic Lab of Michigan, 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.