Diagnostic Solutions Revenue measures Quest Diagnostics revenue from diagnostic-adjacent risk assessment and healthcare information technology services outside the core laboratory business.
Quest Diagnostics reported $250 million of Diagnostic Solutions revenue in 2025.
Diagnostic Solutions was about 2.3% of the two reported business lines
Diagnostic Information Services revenue was $10.785 billion.
Together they total approximately $11.035 billion, putting Diagnostic Solutions at about 2.3% and Diagnostic Information Services at about 97.7%.
The smaller business should remain outside requisition economics
Diagnostic Solutions does not share the same requisition-volume denominator as the core laboratory business.
Use Diagnostic Information Services Revenue to keep the dominant lab-testing revenue base separate.
Revenue mix is not margin mix
A 2.3% revenue share does not reveal the segment's contribution to profit or cash flow.
The businesses have different service models and cost structures.
Primary source: Quest Diagnostics 2025 Form 10-K.
Part of the Diagnostic Laboratory Economics
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- DGXOpen operating-model research →17 of 17 reviewed concepts in Diagnostic Laboratory EconomicsRequisition growth and monetization6 of 6 bridge concepts supportedContinue through this bridge:Diagnostic Information Services RevenueDiagnostic Lab Organic Requisition Volume GrowthDiagnostic Lab Requisition Volume GrowthDiagnostic Lab Revenue per Requisition ChangeDiagnostic Lab Test Requisition Volume
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Compare the small Diagnostic Solutions revenue base with dominant Diagnostic Information Services economics.
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