There is no difference in the implementation process between ISO 9001 and ISO 13485. Those two standards can run together. However, since ISO 13485:2016 does not have a high level structure as ISO 9001:2015 does, you just need to take into consideration the numbering of the requirements. At the end of the ISO 13485:2016, in Annex B you can find Correspondence between ISO 13485:2016 and ISO 9001:2015.
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