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Information Gathered Regarding CIDs 016600 (LABORATORY SCIENCES OF ARIZONA) & 50100 (SONORA QUEST LABORATORIES LLC.
Sep 09, 2025 05:56 PM
Relationship Chain
Quest Diagnostics + Banner Health → Joint venture company: Laboratory Sciences of Arizona (LSA)
LSA owns and operates Sonora Quest Laboratories (SQL)
Operational Roles
LSA handles hospital-based and system-level lab services (inpatient and outreach), providing infrastructure, management, and integration.
Sonora Quest provides outpatient and community clinical testing (drawing stations, routine and specialized testing, statewide logistics).
In Practice
So when people ask if Sonora Quest is “part of Quest Diagnostics,” the accurate structure is:
Quest Diagnostics is one of two parents (with Banner Health) of Laboratory Sciences of Arizona,
and Sonora Quest is the operating lab network under LSA.
👉 You can think of Sonora Quest as the consumer-facing brand for the joint venture, while Laboratory Sciences of Arizona is the corporate entity and governance umbrella.