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Welcome to the Optum Network!

Optum Network Manual

MS Medicaid Quick Reference Guide

Follow Up Appointment Education

Coordination of Care (COC)

All MississippiCAN and CHIP providers must be credentialed through the Mississippi Division of Medicaid’s Medicaid Enterprise System Assistance (MESA) provider portal. If you intend to participate for MSCAN/MSCHIP and UBH/Optum commercial and/or Medicare Advantage, you must submit your application through both processes. If you complete the UBH/Optum network participation form, we can include a MSCAN/MSCHIP participation agreement for those networks in addition to commercial and Medicare (if applicable) if your MESA application is completed. If your intent is to include MSCAN/MSCHIP, we recommend that you complete the MESA credentialing first so that we can include a MSCAN/MSCHIP participation agreement. You can access the MESA portal through the Mississippi Medicaid site here.


Additional information and forms are available, including psych/neuropsych testing guidelines, credentialing plans, and Disability Solutions Manual, on the Provider Express Guidelines/Policies & Manuals and Optum Forms pages.