32 Miss. Code. R. 1-21.1
Claims for covered services will be paid by DOM only when received within twelve (12) months of the through date of service.
The following are the only reasons allowed consideration for overriding the timely filing:
* Claims filed within twelve (12) months from the date of service but denied can be resubmitted with the internal control number (ICN) from the original denied claim recorded on the face of the resubmitted claim.
* Claims over twelve (12) months can be processed if the consumer's Medicaid eligibility has been approved retroactively by the Division of Medicaid. Proof of retroactive determination should accompany the claim and be filed within twelve (12) months from the date of retroactive letter.
Claims submitted two (2) years from the date of service are not reimbursable unless the consumer's Medicaid eligibility is retroactive.
32 Miss. Code. R. 1-21.1