What is MHNet Behavioral Health? MHNet is a health insurance provider designed specifically for people with ongoing mental health issues. MHNet Health Insurance Company or MHNet Behavioral Health was founded by doctors over 25 years ago and now proudly provides. Wondering if your MHNet health insurance will cover addiction rehab? Learn how to find out, or call: 720. Also known as the Mental Health Network, MHNet is a health insurance provider that has been designed specifically for individuals who are seeking treatment for. health care industry! Login page, MHNetProvider. MHNet | 319 followers on LinkedIn | One of the hallmark features of MHNet's Total Behavioral Health Solution is the high degree of.