Anion Gap Reference Range Update

Effective February 7, 2024, at 7:30 AM, Corewell Health West Laboratories will go live with a new reference range for the calculated Anion Gap (AG). The AG reference range will be adjusted to align with recent reference range studies.

The following will be the new normal reference ranges for AG:

Anion Gap: 5 – 14 mmol/L



Electrolyte Panel – EPIC Code: LAB16, Interface Code: 10038, CPT Code: 80051

Basic Metabolic Panel – EPIC Code: LAB15, Interface Code: 10012, CPT Code: 80048

Comprehensive Metabolic Panel (CMP) – EPIC Code: LAB17, Interface Code: 10034, CPT Code: 80053

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