Dear questionner
As far as your last message is concerned, the "green card" act seems irrelevant with the person 'cause the applicant should not be under the coverage of a social security fund.
If the father works for a pharmacy- that means he is socially secured- then his family who are being supported by him are under the social guarantee of the social insurance system. Maybe that was claimed by the administration as a preventive reason for not being eligible for green card.As a result the injured person may seek medical care at the hospitals of social security(SSK).

You have mentioned that he is also a worker and the accident has taken place during the course of work then he may also take advantage of the social security regardless of being registered.The social security Act lays in the Art. 10 that the occupational accident or disease should be treated freely by the State'social fund even before the registration.

-------I assume the person needs an immediate action.If the social security institutions pose bureacratic problems on the application he may seek aid by another hospital.The expenditure expected to be made for the operation should be compensated by the SSK after the operation.