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MississippiCAN and CHIP Companion Guides

Companion guides are the normal tool for communicating to EDI submitters how medical and pharmacy claims information is expected to be received. These documents are often very lengthy.

Under DOM’s new fiscal agent, Gainwell Technologies, FFS, MississippiCAN and MississippiCHIP companion guides were combined. Items which specifically affect the CCOs are noted within each guide.

The updated guides are available at