Yes, you can book a same-day appointment with a hematologist in Mumbai through Credihealth. Dr. Nitin Gupta is a hematologist based in New Delhi who specializes in clinical hematology and bone marrow/stem cell transplantation. He completed his DM in Cl more.. Who is a Haematologist ? A haematologist deals with disorders related to the blood, bone marrow, and lymphatic system. They specialize in pathology, a branch of science that studies body tissues and blood. Their field is vast, and they may work in hospitals, labs, blood banks, or clinics. Clinical Haematology is branch of clinical medicine which deals with diagnosis and treatment of blood & lymphatic system diseases. It includes benign & malignant (Blood cancer) conditions affecting blood cell and stem cell transplant.