Power isolation for medical device

Hi,

We are looking for a small area power isolation solution for 2 means of patient protection for medical device (i.e. 4kVrms isolation and 8mm creepage)

Vin=5V (USB), Vout=5V, Iout= 10mA.

The only solution I found is ADUM4070 but it is needs an external transformer. The only two transformers recommended in the datasheet are not available and it is difficult to find other medical grade small transformers.

Are there any other suggestions that meet our design?

Thanks

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