# Who does Quest Diagnostics Incorporated pay? Who are its key suppliers?
Canonical: https://valuechain.wiki/quest-diagnostics · Facet: suppliers · Updated: 2026-09-24T04:50:47.861951+00:00 · Source: ValueChain.wiki (cited money-flow graph)

**Citable summary**: Quest Diagnostics Incorporated's confirmed suppliers/cost counterparties include Siemens AG plus 1 undisclosed/aggregate relationship. Per the valuechain.wiki graph: 2 cost edges, backed by 2 dated sources, 0 of them primary filings (as of 2026-09-24).

### Spectra Laboratories (high)
- metric: Amount $84M · FY2025 · Cash consideration for acquired Spectra Laboratories clinical and dialysis-water testing assets
- note: Quest acquired clinical testing and dialysis-related water testing assets from Fresenius Medical Care's Spectra Laboratories in 2025. Aggregate cash consideration for the businesses was $84 million.
- [confirms] SEC EDGAR (EN, filing, published 2026-02-26) https://www.sec.gov/Archives/edgar/data/1022079/000102207926000015/dgx-20251231.htm: "paid $84 million of aggregate cash consideration."
- [confirms] Quest Diagnostics (EN, ir, published 2025-08-05) https://s2.q4cdn.com/390454341/files/doc_news/Quest-Diagnostics-Completes-Acquisition-of-Clinical-Testing-Assets-from-Fresenius-Medical-Care-2025.pdf: "completed its previously announced acquisition of select clinical testing assets."

### Epic Systems (high)
- note: Epic supplies technology and services for Project Nova, which consolidates Quest's ordering, results, scheduling, billing, and customer-service systems. The 10-K identifies Epic as a third-party licensor, but the amount payable specifically to Epic is not disclosed.
- [confirms] Quest Diagnostics (EN, ir, published 2025-09-23) https://ir.questdiagnostics.com/press-releases/press-release-details/2025/Quest-Diagnostics-to-Improve-Laboratory-Testing-Experience-with-Industry-First-Epic-Collaboration/default.aspx: "Epic will work with Quest to deliver a suite of technologies and services."

### 지멘스 (mid)  → /siemens-ag.md
- note: Siemens Healthineers, part of Siemens, was selected as Quest's preferred immunoassay supplier under a multi-year agreement covering up to 120 Atellica analyzers across 19 U.S. core and esoteric laboratories. Supplier-specific spending was not disclosed.
- [confirms] Siemens Healthineers (EN, ir, published 2020-02-04) https://www.siemens-healthineers.com/press/releases/pr-atellica-quest-diagnostics.html: "selected by Quest Diagnostics to be its preferred supplier for immunoassay testing."

Reverse side: https://valuechain.wiki/quest-diagnostics/customers.md · Ripple: https://valuechain.wiki/quest-diagnostics/ripple.md

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