If you are attending the surgery for an agreed face to face appointment, you will need to wear a face covering. This can be a simple scarf which covers your mouth and nose.
See the below links for more Government guidance on face coverings:
Face Mask Exemption
Please be aware that doctors are not able to write letters to exempt patients from wearing masks.
You can download a face mask exemption card like the one below or make your own and carry it around on lanyard or clip badge.