Concentra Urgent Care — Rancho Cucamonga

Concentra Urgent Care is a Concentra Urgent Care center — the largest occupational health and urgent care provider in the US, with 520+ medical centers across 44 states serving over 50,000 employer clients and treating ~50,000 patients per business day. Concentra was founded in 1998 and is owned by Select Medical Holdings (NYSE: SEM, with Welsh, Carson, Anderson & Stowe as a partner). Concentra specializes in workplace injury care (the #1 worker's compensation provider in the US), DOT physicals (all centers have certified medical examiners), pre-employment drug screening (DOT and non-DOT panels), executive physicals, fit-for-duty exams, biometric screenings, and general walk-in urgent care for non-work illnesses and injuries. Most Concentra centers partner with local employers for on-site or near-site occupational medicine services, including injury triage, return-to-work coordination, and health surveillance programs (audiometric, respirator fit testing, OSHA compliance). Standard hours: weekdays 7 AM-5 PM with select 24/7 industrial-area locations; most accept walk-ins for non-occupational visits.