Quest Diagnostics Inc

DGX: XNYS (USA)

Morningstar Rating for Stocks	Fair Value	Economic Moat	Capital Allocation
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Quest Diagnostics Has Carved Out a Narrow Moat on Its Attractive Cost Structure

Debbie S. Wang

Sep 14, 2026

Business Strategy and Outlook

Quest Diagnostics is a leading provider of independent diagnostic testing in the US thanks to its network of roughly 2,400 patient service centers across the country. Quest's scale-driven cost advantage allows the firm to benefit from several secular trends, including the proliferation of diagnostic tests and greater clinical reliance on personalized therapies. Additionally, Quest is enjoying a reprieve from Medicare-related pricing pressure as regulators tinker with the method for setting lab test reimbursement rates.

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Quest Diagnostics Inc

Quest Diagnostics Has Carved Out a Narrow Moat on Its Attractive Cost Structure

Business Strategy and Outlook

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