It doesn't matter if you don't know English or Cantonese. It's ok to communicate in Mandarin. Someone downstairs said he didn't know anything and was killed. It's actually wrong. Medical supervision in Hong Kong is very strict, and all hospital services are clearly priced. Doctors will have enough time to communicate with patients. Generally, they have to pay for the first consultation, which is about 800-2000 Hong Kong dollars. If you need to do other tests and treatments, you need to pay extra. Of course, Yanghe Hospital is a private hospital with relatively high fees in Hong Kong.
Moreover, it is a medical habit for many mainlanders to go to Hong Kong to see a doctor. Designating a hospital is to arrange a resident specialist. In fact, most specialists in Hong Kong are in private practice, while ordinary consultations are conducted in clinics. If patients need surgery or other treatment, they will be arranged in the hospital. A private doctor can be listed in different private hospitals.
To sum up, it is more important for doctors to make an appointment in Hong Kong than to make an appointment with a hospital.