Physicians have 90 days from the DOS to submit their claims to MSP.

On the 90th day, the claim(s) must be received by MSP prior to 7:00 pm PST. If the claim is received after 7:00 pm, it is considered the 91st day.
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​If a claim is over the 90-days, MSP requires an overage approval to be submitted. This overage approval must accompany a valid reason as to why the claim was not submitted on time. Acceptable reasons are (but not limited to): family emergency, health issues, etc. Late claims will not be accepted due to clerical issues.
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If a claim has been submitted within the standard 90 days, but comes back from MSP as "rejected", physicians then have an additional 90 days from the Remittance Day (day of rejection) to resubmit their claim with a note for MSP to review.