Illinois Medicaid 837P Companion Guide
To look up Illinois Medicaid 837P electronic standards for submission, refer to the Illinois Medicaid 837 Professional Companion Guide here. This guide provides detailed specifications and requirements for submitting professional healthcare claims electronically.
Secondary Claim Submission
For secondary claim submission to Illinois Medicaid (HFS), the Primary Payer ID must be a combination of the 3-digit TPL (Third-Party Liability) code followed by a 2-digit Status Code. For a complete list of TPL codes, see here. To view the corresponding status codes, refer to the official document at HFS TPL Status Codes.
