Oncology,
- MBBS - All India Institute of Medical Sciences, New Delhi
- MD - Internal Medicine - All India Institute of Medical Sciences, New Delhi
- DM - Medical Oncology - All India Institute of Medical Sciences, New Delhi
- Fellowship - RCP, Edinburgh and London Memberships
- Medical Oncology, Executive Director- Fortis Memorial Research Institute, Gurgaon , currently working
- Medical Oncology , Professor and Head- All India Institute of Medical Sciences (AIIMS), New Delhi , 2001
- Cancer Center, Head - Royal Hospital, Muscat, Oman , 2001
- Medical Oncology, Associate Editor - Annals of Oncology , 2008
- Medical Oncology, Head - All India Institute of Medical Sciences (AIIMS), New Delhi , 2007Delhi Cancer
- Registry , Head- All India Institute of Medical Sciences (AIIMS), New Delhi , 2005
- Record Section, Head- IRCH AIIMS
- Medical Oncology, Executive Director- CrediHealth Video