Those who are registered with the SSN are entitled to free or subsidised medicines, a 75 per cent reduction on the cost of out-patient and after-care treatment, and some subsidised dental treatment. All in-patient treatment, i.e. treatment requiring hospitalisation is free under the national health service. Many medical expenses can be totally or partially deducted for tax purposes, including the cost of spectacles, hearing aids and visits to medical specialists, so you should retain all medical receipts