Contact Us

At Chicago Health System our customers are important to us.  If you should have any questions or comments, feel free to call, email or write us at:

Chicago Health System
750 Pasquinelli Drive, Suite 216
Westmont, IL 60559
(708) 783-7100

For Members and Providers 

Behavioral Health or Substance Abuse Questions            (708) 783-7600

Customer Service for Member and Provider Services      (708) 783-7100 (English and Spanish)

For eznet access inquiries or password resets, please send an email including your name and username to

Provider Required Notification

This is a reminder that Chicago Health System, Provider Relations must be notified of any change(s) in writing, including the effective date at least ninety (90) days prior to the change. This includes but not limited to:

  • Physician retirements, terminations or new providers joining the group
  • Office hours, address, phone numbers
  • Tax ID’s or NPI changes (all which requires a new W-9)
  • Change in office manager, email or billing service