Visit www.dialysisholidays.co.uk they are a company specialising in haemodialysis cruises based in the UK. My friend booked through them and said they are really helpful and professional. They are also the company that Peter Deilmann recommend.
Peter Deilmann Ocean Cruises offer this service. The 5-star 520-passenger ship 'Deutschland' offers voyages worldwide and can accommodate 8 haemodialysis patients per cruise. Package prices include flights, transfers and the cruise. E111 is accepted but an additional supplement is payable per treatment.