Your suggestion is a little wrong. The "Hospital list" is the "Data List" and every record from there - "Data item". Via Studio->Forms->Data items you may add the new units where is enough to write a Name of the new hospital. Or you may export your data via MySQL like our countries example.

INSERT INTO `sys_form_pre_values`(`Key`, `Value`, `Order`, `LKey`, `LKey2`) VALUES

('Country', 'AF', 1, '__Afghanistan', '');

So here is: Country - name of your Data list, 'AF' - value, 1 - order id of this item in the list, __Afghanistan - a language key for translation for different languages.