• I Am a Member
  • For Providers

Forms



Nominating a Provider - To join the Tier1 Network



Coordination of Benefits

3480 E. Guasti Road
Ontario, CA 91761
United States

Phone: 909-235-4400

About Us
About your Health Plan
Benefit Guide

Customer Service
Dental
Find a Provider
Forms

Leadership
Member ID Card
Resources
Tier 1 Provider Directory
Vision

Privacy Policy Site Map Website Accessibility
Prime Healthcare | Top 15 U.S Health Systems
Copyright 2026 | Powered By Steer Health Logo White