This page provides timely and relevant information regarding recent changes to Quest Diagnostics services within Corewell Health. It is intended to support our clinical partners—including physician offices, laboratories, and clinics—by offering access to official communications, printable resources, and reference documents. Please refer to the materials below for details on service updates and operational impacts.
Supporting Documents
Below are downloadable resources related to the Quest Diagnostics service updates. These materials are intended to provide additional context and assist with communication and implementation across your organization.
Crosswalks:
→Send Out Test Crosswalk: A side-by-side comparison of previous and updated service elements for 11/19/2025. [Download PDF]
→Send Out Tests with Container Updates: A side-by-side comparison of tests with updated container elements for 11/19/2025. [Download PDF]
Memos:
→A formatted version of the latest update for distribution or posting:
→2025-10-31 Primary Reference Lab Update Quest EAST [Download PDF]
→2025-10-31 Primary Reference Lab Update Quest SOUTH [Download PDF]
→2025-10-31 Primary Reference Lab Update Quest WEST [Download PDF]
Recent News Posts:
→Primary Reference Lab Change to Quest Diagnostics(10/27/2025)
→Corewell Health Letter to Existing Clients (8/26/2025)
Additional Information