Medicine and healthcare are information intensive sectors where huge amount of information is created, processed and stored on daily basis. Healthcare clouds are providing these services in seamless fashion and in all possible secure ways. This information is shared among multiple shareholders in multiple ways at multiple locations at multiple times. Providing Fine-tuned access to such information is inevitable in order to maintain secrecy, integrity, authenticity, availability and traceability. And thus, we are proposing a modern cryptography based Fine-tuned access control technique supported by Blockchain Technology.