Are biopsies done when someone is early on in remission as in a year or less?

My father had cancer this time last year and over the summer it was removed in surgery and he did treatments after and was in remission. I know for the first year they do 3 month checkups but do they do biopsies to do a checkup? I heard my dad mention a biopsie today and he is getting a scan tomorrow. Is this normal?
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