MedicaidReimbursementMedium impact
Mobile Crisis Response (MCR) Procedure Code S9484 Claim Adjustments
Illinois Medicaid - HFS·IL · Psychiatry·Provider Notice
Effective date
Dec 17, 2019
We identified it
Jun 20, 2026
Summary
Illinois Medicaid has corrected system issues with Mobile Crisis Response (MCR) procedure code S9484 that caused claims to pay at $0.00 or incorrect rates. Providers can now rebill voided claims and submit replacement claims for underpaid services, with timely filing edits lifted through May 30, 2020.
Action Required
By May 30, 2020: Billing team must review all S9484 Mobile Crisis Response claims from August 1, 2018 forward for $0.00 payments or underpayments. Check remittance advices for 19C adjustment codes with reason '3201 - Service Void'. Rebill voided claims at usual and customary charges through MEDI or 837P files. Submit replacement claims for any underpaid services processed before October 10, 2019 rate update, ensuring submission within 12 months of original paid voucher date.