1. Introduction to Magnetic Nanosystems: Classifications, Structure, Properties, Biological Interactions and Diagnostic Applications2. Synthesis and Processing Methods of Magnetic Nanosystems for Diagnostic Tools and Devices: Design Strategies and Physicochemical Aspects3. Surface Functionalization or Modification Strategies of Magnetic Nanosystems4. Characterization Techniques of Functionalized Magnetic Nanosystems5. Biocompatibility and Toxicity Assessments of Functionalized Magnetic Nanosystems6. Functionalized Magnetic Nanosystems for Diagnostic Tools and Devices: New Perspectives in Disease Diagnosis7. Functionalized Magnetic Nanosystems for Point of Care and Point of Need Diagnostic Applications8. Biogenic and Biomimetic Functionalized Magnetic Nanosystems: Synthesis, Properties and Biomedical Applications9. Functionalized Magnetic Nanosystems for Cancer Diagnosis and Therapy10. Functionalized Magnetic Nanosystems for Immobilization of Proteins and Enzymes11. Functionalized Magnetic Nanosystems for Diagnostic Tools and Devices in Bio-Barcodes and Smartphones12. Functionalized Magnetic Nanosystems for Medical Imaging13. Functionalized Magnetic Nanosystems for Drug Delivery Applications14. Functionalized Magnetic Nanosystems for Tissue Engineering Applications15. Functionalized Magnetic Nanosystems for Molecular Detection of Biomarkers16. Functionalized Magnetic Nanosystems for the Detection and Control of Infectious Diseases17. Functionalized Magnetic Nanosystems in Nanomedicine18. Functionalized Magnetic Nanosystems for In-vivo Treatment of Diseases19. Functionalized Magnetic Nanosystems Based Electrochemical Sensors for Medical Diagnostic Tools and Devices20. Functionalized Magnetic Nanosystems for Narco Drug Detections and Military Applications 21. Polymer Mediated Functionalized Magnetic Nanosystems for Biomedical Applications22. Mesoporous Core-Shell Structured Functionalized Magnetic Nanosystems for Diagnostic Tools and Devices23. Functionalized Magnetic Nanogels for Diagnostic Tools and Devices24. Functionalized Magnetic Nanocomposites/Hybrids for Diagnostic Tools and Devices25. Safety Considerations, Environmental, Legal and Health Impact of Functionalized Magnetic Nanosystems26. A Futuristic Insight into Functionalized Magnetic Nanosystems for Diagnostic Tools and Devices: From Lab to Commercial Applications