Extreme Weather conditions adversely affect specimen integrity. Corewell Health Laboratory is committed to working with you to maintain specimen integrity during extreme conditions.

Exposing specimens to extreme temperatures can have a negative impact on patient results. We suggest that if the office pickup time is greater than one hour from the time the samples are being placed in the lockbox, you consider protecting the samples with some sort of insulated material.

Below are some steps to take in preparing specimens for lockbox pickup during extreme conditions.

• If the lockbox is not permanently affixed outside and is exposed to the elements, move it inside daily when arriving at the office in the morning. This will keep the lockbox temperature regulated and protected from extreme temperatures.
• For lockboxes permanently mounted outdoors and exposed to the elements, please keep specimens inside the office until either 15 minutes before scheduled pickup or leaving for the day.
• If it will not affect specimen integrity or patient care, please consider holding the specimen until the following day.
• Utilize draw centers (patient service centers) for specimen collection.

For questions regarding the best way to maintain the integrity of your samples and test information, please contact your Laboratory Sales Representative or laboratory client services at 800 551 0488.

 

January 2026

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 multi-faceted 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 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 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 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 to support 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