How do i contact horizon therapeutics customer service? For any other inquiries, please call 1-866-479-6742 (Option 2), email [email protected] or submit the below form.How do i contact horizon healthcare of new jersey? For all other questions about your benefits, please call the number on your ID card during normal business hours or sign in to send a secure email 24/7. . Horizon POS, Horizon HMO, Horizon PPO: Horizon Healthcare of New Jersey. PO Box 820. Newark, NJ 07101.How do i contact horizon bank customer support? Chat online with our support team Monday - Friday 8 am to 5 pm CST. Live chat is available for questions 24/7/365. What is my routing number? The Amercian Bank Association (ABA) routing/transit number and your Horizon Bank account number are located on the lower left-hand corner of your check as shown below.