There is no law that requires employers to pay for employee health care. So if your company will pay for medical care to employees. It is considered the welfare of the employees.
It does not contain any original law requires that employers must pay for medical treatment, the employee. So if your company will pay for the medical treatment given to employees. It is considered as an employee benefit.
It is not a law which requires that the employer must pay to an employee, so if the company you will be paid to the employee medical expenses would be considered a staff welfare.