Advice

We cant say Health Care Domain is vast.
 
There is lot more terminogies that were used in the Health Care Domain, you need to know and understand it.
 
You need to know some tools like SNOMED browsers, which is used in the health care applications.
 
Health Care Standards are there, which were used globally across the world.
 
You need to know the complete life cycle management of a process in the Hospitals.
 
You need to take care of the admission of the patient, record and maintaining the complete information about that patient.