Primary Care & Urgent Care Have Any Questions? [email protected] Corona Premium Care Clinic Opening Hours Mon-Fri: 9am to 5pmSaturday: 9am to 3pm Closed on Sunday Call (951) 603-3335 Chino Hills Care Clinic Opening Hours Mon-Fri: 9am to 5pmSaturday: 9am to 3pm Closed on Sunday Call (909) 903-2330