I don’t know what Mac is or if the other problems are related, but my personal experience is that if you ask when you are there, they want to help the whole person.

@jammer, Mayo Clinic has experts from every discipline who collaborate and work together in the best interest of the patient. I suggest that you inform the doctor or department where you are currently scheduled, and give them an update of your current new conditions. It could be related to the medications that you are taking, or something else. They might request more information now, or they will want to wait until you arrive. Whether or not you actually 'see' a doctor from a different department, you can be assured that your records and/or new tests will be reviewed by the apprpopriate department.
Please do this now, since you say that your site is getting worse.

Have you visited out Visiting Mayo Clinic Discussion Group?
https://connect.mayoclinic.org/group/traveling-to-mayo-clinic/
Jammer, I send you my best positive thoughts for healing. I will be here and I am happy to assist you in any way that I can.

@jammer, I completely agree with @rosemarya. Contact the department (Pulmonary Medicine https://www.mayoclinic.org/departments-centers/pulmonary-medicine/home/orc-20397844) where your appointment is currently scheduled. They will want to know about these additional developments, which may or may not be related to MAC and/or the treatment. If you need to see additional specialists, that will be arranged either during the same visit or a subsequent visit.

I'm tagging @windwalker as she goes to Mayo Jacksonville for MAC and may have more specific helpful hints.

Jammer, you might also be interested in these discussions in the MAC group:
- Vision Problems while on Treatment for MAC? (excluding ethambutol) https://connect.mayoclinic.org/discussion-manage/vision-problems-while-on-treatment-excluding-ethambutol/
- Eye problems with treatment? https://connect.mayoclinic.org/discussion/eye-problems-with-treatment/