In an emergency, call 999 and ask for an ambulance.
All emergencies are dealt with by public hospitals in Hong Kong, and you don’t need to register to get treated.
Hong Kong hospitals use a triage system, meaning your waiting time will depend on which of the following five categories you’re put into upon arrival: critical, emergency, urgent, semi-urgent, or non-urgent. Hong Kong’s emergency medical service costs HK$180 to use2.
It's also worth knowing that you could be fined HK$2,000 and possibly even imprisoned for six months for improper use of Hong Kong’s 999 service.
Paying for healthcare
Resident foreign nationals (in other words, expats with visas who haven’t lived in Hong Kong for more than seven years) get to enjoy the same level of medical care at the same cost as permanent Hong Kong residents.
It costs around HK$50 for a standard public out-patient appointment, excluding any additional treatment or medication, for those eligible, with a valid Hong Kong ID.
However, if you don’t have a valid Hong Kong ID then you could end up paying considerably more: HK$445 for an out-patient appointment and HS$1,230 for emergencies2 (which is why having a good health insurance policy in place is so important).
Employers in Hong Kong have to provide health insurance for their employees by law3, but it’s important to check how much cover your employer’s policy gives you.