For Providers Claims Submission EDIDepartment ContactsCompliance / Fraud, Waste & AbuseProvider AppealsProvider CommunicationProvider PortalSpecial Claims Project Department Contacts Allegian Advantage (HMO) makes it easy to find who you’re looking for! CLAIMS Phone: (855) 805-4152 option 1 Fax: (855) 899-1217 PROVIDER RELATIONS AND NETWORK MANAGEMENT Phone: (956) 389-2273 (877) 422-4400 option 4 Fax: (956) 389-2287 We're sorry. The zip code you entered is not part of our service area. Please enter a valid zip code.