Yes, DH has cancer and has many times said he needs his own PA to deal with all the appointments, both making them, changing ones the NHS has made on the wrong dates/in the wrong order, chasing his monthly chemo prescription between the oncology dept and the hospital pharmacy (messed up every single month!), etc.
You'd think there'd be some kind of "streamlined" system for routine monthly tests, consultations and treatments, but even within the same department it's all a disjointed mess with different receptionists/appointment clerks for different aspects of the regular/recurring treatment. Add in other appointments for blood tests, scans, x-rays, etc., and it becomes an absolute nightmare.
Not only that, but of course, the GP surgery has no knowledge of what's happening within the oncology sphere, don't get the blood test results nor regular updates as to what oncology has been prescribing, and then the oncologist refers DH back to his GP with any issues not directly related to the cancer/chemotherapy, but the GP is "blind" as to what's going on outside his remit, so has to order their own blood tests, scans, x-rays, etc, which inevitably clash with existing appointments in different places, so also need re-arranging.
It's a nightmare. Even the oncologist has troubles with it all, as she seems to think it should all be seemless, but then when she tries to do something, just hit with a load of reasons why it can't be done, so despairs with it all.
DH often says the consultant/oncologist should have their own PA, not a secretary, but someone who literally follows them around all day, sits in on consultations, etc., to make things more streamlined, in the same way that a business director would have their own PA. He has his oncologist's direct phone number and it does help occasionally to knock heads together, but even the secretary doesn't know what the oncologist has said until the consultant notes (dictated) have been transcribed (by someone somewhere else) which can take a few days.