130 CMR, § 450.242
A timely claim will stay any suspension or termination or provider service restriction described in the final determination until there has been a final agency action pursuant to 130 CMR 450.243(D) or 450.248; provided, however, that if the MassHealth agency finds on the basis of information it has before it that a provider's continued participation in MassHealth or in the case of provider service restrictions, participation without such restrictions, during the pendency of the administrative appeal could reasonably be expected to endanger the health, safety, or welfare of members or compromise the integrity of MassHealth, the suspension, termination, or provider service restrictions will not be stayed. A timely claim will not stay any withholding of payments under 130 CMR 450.249.
130 CMR, § 450.242