If a provider delays submitting a claim in order to bill a member’s health insurer (see 130 CMR 450.316 through 450.318), the claim will have been timely submitted if it is received:

1. (A) no later than the 90th day after the date of the notice of final disposition by the health insurer (if more than one insurer is involved, the submission period will be measured from the latest final disposition, and the period for making requests will be measured from the date of the notice of final disposition from the previous insurer); and
2. (B) no later than 18 months after the date of service.