spinning.top,
a change in sterilization process (provider) requires risk assessment within the company's change-control system: depending on the nature of the change and the outcome of your assessment, the existing sterilisation validation & biocompatibility evaluation (especially in terms of potential residuals according to ISO 10993-7, but maybe not limited to residuals) may or may not be affected. Have a look to
AAMI TIR28:2016 for guidance of some of these apects.
Also consider the impact of the proess change to packaging stability and performance as well as product performance (maybe even product stability).
HTH,
Gerhard