The textbook titled ‘Medical Diagnostics’ is designed according to the CBSE syllabus and consists of the following three units: Unit 1 - Haematology-Process and Investigations, Unit 2 - Blood Bank and Transfusion, and Unit 3- Cytopathology. The first unit chapters describe the general and diagnostics hematology for the analysis of blood plasma, serum, and cells. The chapters of the second unit describe the instruments, equipment, and techniques used in the blood bank and blood transfusion process. The chapters of the third unit describe general techniques, equipment, and procedures of cytopathology, pap smear, buccal smear, cytology and cell blocks, cytological fixatives, staining procedure, etc. The text of this book is useful for class XIIth and graduations (B.Sc, MBBS) and postgraduate (M.Sc, MD) students to learn, understand and develop their skills in Medical Diagnostics.