What is the formula for Length of stay and case mix index?

ALOS = bed days ÷ discharges. CMI = Σ DRG weights ÷ discharges Same DRG grouper and period

Is the Length of stay and case mix index calculator free to use?

Yes. It is part of VVnT SeQuor's free, no-login Engineering Metrics Workbench. Calculations run in your browser.

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Work out average length of stay and case mix index, and a case-mix-adjusted length of stay.

Operations & supply chain

Healthcare

NoteA higher case mix explains part of a longer stay; compare adjusted length of stay across units.

Source: CMS case mix index; OECD length of stay definitions

VVnT SeQuor's Core IT & Managed Services practice helps teams turn this metric into a plan.