Ambulatory – Corewell Health Laboratory

Ambulatory, Corewell Health System, Outreach/Outpatient

Medicare Advantage Coverage Requirements for Select Laboratory Tests

Beginning October 12, 2026, patients with Medicare Advantage coverage must have an appropriate medically necessary diagnosis associated with certain laboratory tests for the testing to be covered.

This change affects the following tests:

Test	Lab Order Code(s)
Vitamin D	LAB1231384, LAB1231583
Vitamin B12	LAB67, LAB1231122
Lipid Panel	LAB18, LAB2111122
Hemoglobin A1c (Hgb A1c)	LAB90
Thyroid Stimulating Hormone (TSH)	LAB129, LAB1231632, LAB1000, LAB3077

October 8, 2026 by Laboratory Services

Ambulatory, Outreach/Outpatient, Southeast Michigan

Urinalysis with Microscopy if Indicated Update (Ambulatory and Outreach/Outpatient)

Effective October 7, 2026, the reflex-to-microscopy criteria for Urinalysis with Microscopy if Indicated (LAB1231026) will be updated. These changes are intended to reduce unnecessary microscopic examinations while ensuring clinically significant findings continue to receive appropriate follow-up testing. Continue Reading

September 29, 2026 by Laboratory Services