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System Outage Affected Claim Submissions Received on May 3, 2021
Medical Mutual of Ohio·In the News
Effective date
May 3, 2021
We identified it
Jun 20, 2026
Summary
Medical Mutual experienced a system outage on May 3, 2021 that caused some accepted claims to receive incorrect rejection notices (277CA) with status code '--1'. Affected claims must be resubmitted as the insurer cannot identify which specific claims were impacted.
Action Required
Immediately: Billing team must check all claims submitted to Medical Mutual on May 3, 2021 for rejection notices (277CA) with status code '--1'. Resubmit any claims that received this specific error code. Contact Medical Mutual Customer Care at 1-800-362-1279 with questions about affected claims.