1850 Spring Ridge Drive, Susanville, CA 96130 phone: (530) 251-5000 / F fax: Clinic Hours Mon-Fri: 8 am to 5 pm. Urgent Care Walk-in Hours Mon-Fri: 8 am to 7 pm Sat: 8 am to 12:30 pm | 2 pm to 4:30 pm CLOSED: Sunday. 24 Hour Nurse Advice Line Partnership patients call: 866-778-8873 California Health and Wellness patients call: 877-658-0305.