RAYUS Radiology (fka Center for Diagnostic Imaging / CDI)

Employment

Not publicly disclosed. Likely salary + productivity model for employed rads at owned centers. Hospital staffing arm may use contracted/locums structure.

History

Founded 1981 as CDI (Center for Diagnostic Imaging) in Minneapolis. Acquired by Wellspring Capital Management Mar 2019. Rebranded as RAYUS Radiology Jun 2021. Key acquisitions: Foundation Radiology Group (100+ rads, 45+ hospitals, Jul 2021); Diagnostic Centers of America (South FL, Oct 2021); multiple Salt Lake City centers; Sand Lake Imaging (Orlando); several add-ons via PrivSource. Official medical provider for US Ski/Snowboard, Speedskating, Bobsled teams. Partnered with Ezra for whole-body MRI program (Apr 2024). 2,000+ total employees. UPDATES (2024–2025): • No major acquisitions since 2021 (DCA Oct 2021 was last). Tracxn confirms 0 acquisitions 2022–2026. • Continuing organic de novo growth: Opened 2 new locations in Westbrook ME (May 2025) at Rock Row Health Campus in collaboration with Spectrum Healthcare Partners (IR physicians). • Added RAYUS Vascular Care as branded service line at new locations. • 400+ "aligned" radiologists (mix of employed + contracted) — figure from Jun 2021 rebranding; not updated since. "140+ centers" from 2021–2022 era; likely grown modestly via de novos. • CEO: Kim Tzoumakas (long-tenured). SVP Operations and Business Development: Jarred Onarheim. • Operating in "all 50 states" for hospital staffing (PC-only division). Fixed center states: MN, WI, CO, FL, WA, ME, UT, and others (not fully disclosed). • Quality and Innovation Institute (CDI QI non-profit affiliate) provides evidence-based imaging protocols and clinical trial infrastructure (150+ clinical trial protocols nationwide).

Technical Component

Owns 140 fixed outpatient imaging centers (TC). Employs radiologists providing PC reads within those centers. Separate hospital staffing/coverage division provides PC reads to hospitals across all 50 states (PC-only for that segment).