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Corewell Health System

Corewell Health System, Referral/Sendouts

Lipoprotein (a) Test Change

Effective June 3, 2026, due to vendor raw material supply shortages, all Lipoprotein (a) testing will be transitioned from in-house assay to Quest Diagnostics, Wood Dale, IL.

  Current (In-House) Quest Diagnostics
Test Name Lipoprotein (a) Lipoprotein (a)
Test code LAB1230915 LAB1232338
Preferred Specimen Type Serum Serum
Reference Range ≤30 mg/dL <75 nmol/L
Turn Around Time 2 days 4 days

.

 Quest Diagnostics Risk Stratification Risk nmol/L
Optimal <75
Moderate 75-125
High >125

NOTE: With this transition, there will be changes in reference ranges and units of measurement. The units will change from mass units (mg/dL) to molar units (nmol/L); molar units are the preferred units per the 2026 American College of Cardiology/American Heart Association Joint Committee Guidelines. There are no changes to the specimen type. Turnaround time will be 4 days.

June 8, 2026 by
Dearborn, Farmington Hills, Grosse Pointe, Royal Oak, Southeast Michigan, Taylor, Trenton, Troy, Wayne

Body Fluid Culture – Specimen Collection Update

Effective June 1, 2026, Corewell Health Microbiology Laboratory in Southeast Michigan is updating specimen collection criteria for body fluid specimens. Microbiology will no longer accept red top vacutainer tubes as a collection device for body fluids (i.e. synovial fluid, pleural fluid, peritoneal fluid, etc). Collection criteria information has been updated in Corewell’s Lab Test Directory to reflect this change. Test order for body fluid cultures is LAB2111016 (aerobic culture) and commonly accompanied by LAB233 (anaerobic culture). Continue Reading

May 22, 2026 by
Niles, Southwest Michigan, St. Joseph, Watervliet

Changes to Outpatient Occult Blood (FIT) Stool Testing (Corewell Health Southwest Region)

Effective Tuesday, May 26, 2026, outpatient occult blood testing (stool) will no longer be performed at Corewell Health Lakeland St. Joseph Laboratory and will instead be routed or mailed to Corewell Health Reference Laboratory in Grand Rapids, MI (35 Michigan St.) for processing.

In addition, the collection kits will be updated from OC-Light™ S FIT collection kits to OC-Auto™ collection kits. Continue Reading

May 21, 2026 by
Corewell Health System, Hematology

Schistocyte Review Test Now Available to Order

Effective Wednesday, April 29, 2026, Schistocyte Review (LAB1231565) will be available to order across all Corewell Health Laboratories Hematology Departments.

This new orderable supports alignment across Corewell Health regions by standardizing schistocyte assessment practices, ensuring high‑quality testing, and delivering a consistent patient care experience system‑wide.

Continue Reading

April 23, 2026 by
Blood Bank, Compliance & Safety, Corewell Health System

Reminder Pre‑Surgical Type & Screen Orders

When ordering a Pre‑surgical Type & Screen, all required order questions must be completed accurately. These answers drive specimen routing, collection timing, and blood bank workflow in Epic.

Epic uses your responses to ensure testing is performed by the correct blood bank at the correct time. Incomplete or incorrect information can result in misrouted specimens, delays, rework, or redraws.

Continue Reading

April 15, 2026 by
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

February 23, 2026 by