Last updated: 12/8/2025
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 (PDF):
Go live 12/17/2025
→Send Out Test Crosswalk: A side-by-side comparison of previous and updated service elements for 11/19/2025. (updated 12/7/2025)
→Send Out Tests with Collection Updates: A side-by-side comparison of tests with updated container elements for 11/19/2025. (updated 12/7/2025)
→Send Out Tests that will Require a Follow Up with the Ordering Provider: A side-by-side comparison of tests that will require follow-up with the ordering provider due to the test conversion not being 1:1 (updated 12/7/2025)
Go live 11/19/2025
→Send Out Test Crosswalk: A side-by-side comparison of previous and updated service elements for 11/19/2025. (updated 11/20/2025)
→Send Out Tests with Container Updates: A side-by-side comparison of tests with updated container elements for 11/19/2025. (updated 11/20/2025)
→Send Out Tests that will Require a Follow Up with the Ordering Provider: A side-by-side comparison of tests that will require follow-up with the ordering provider due to the test conversion not being 1:1 (updated 11/20/2025)
Memos (PDF):
A formatted PDF version of the latest update for distribution or posting:
→Primary Reference Lab Update Quest EAST (updated 10/31/2025)
→Primary Reference Lab Update Quest SOUTH (updated 10/31/2025)
→Primary Reference Lab Update Quest WEST (updated 10/31/2025)
Recent News Posts (Link):
→Primary Reference Lab Change to Quest Diagnostics(updated 10/27/2025)
→Corewell Health Letter to Existing Clients (updated 8/26/2025)
Additional Information