• Anaesthesia & Pain Management
• Senior House Officer 04/10/71 – 31/12/71 & Safdarjung Hospital, New Delhi 01/07/72 – 31/12/72
• Senior Resident 10/03/73- 09/03/76 Safdarjung Hospital, New Delhi
• Senior Resident 10/03/76 – 28/04/79 A.I.I.M.S, New Delhi
• Lecturer 29/07/78 – 26/05/78 A.I.I.M.S, New Delhi
• Consultant / Lecturer 02/07/78 – 21/06/89 Lagos University Teaching Hospital / College of Medicine University of Lagos, Lagos, Nigeria Senior Consultant Head Dept. of May 1990 – March 1996 Anaesthesiology Noida Medicare Centre, Noida
• Senior Consultant and Chairman 28/09/95 – 15/01/96 Dept. of Anaesthesia, Vidyasagar Institute of Mental Health and Neurosciences, New Delhi (VIMHANS)
• Sr. Consultant Dec 1995 to till date Neuro-Anaesthesiology & Pain Management Joining on 27th Oct 1995 Indraprastha Apollo Hospital, New Delhi
• Teaching Experience
• University College of Medical July 1973 – 09/03/76 Science, New Delhi, India.
• All India Institute of Medical 10/03/76 – 26/05/78 Sciences, New Delhi, India.
• College of Medicine, Lagos 02/07/78 – 21/06/89 University Teaching Hospital. Post Graduate Responsibilities 1. Post Graduate teaching for Post Graduate students in Diploma in Anaesthesia and Post Graduate students appearing for F.N.M.C (Anaesthesia), Nigeria. 2. Departmental Representative for three years in residency programme sub-committee of Lagos University Teaching Hospital and board of Post Graduate studies of University of Lagos. 3. Supervisor to Ph.D. course, University of Delhi on “Developing and Managing Trauma Care System in Metropolis”. 4. Council member Post-doctoral Critical Care Medicine Fellowship – First such programme in the country, at Indraprastha Apollo Hospital, New Delhi. Administrative 1. Departmental responsibilities on occasions when the substantive head is away. L.U.T.H / C.M.U.L Lagos. 2. Organized the establishment of departments of Anaesthesia at Noida Medicare Centre, VIMHANS, and Neuroanaesthesiology at Indraprastha Apollo Hospitals, New Delhi. 3. Established dept. of Neuroanaesthesiology at Indraprastha Apollo Hospitals, New Delhi. 4. Executive Director, Prakash Hospital Noida (NCR Delhi), 1998- 2004 5. Chairman, Samvedana Pain Hospital, Noida 1(NCR Delhi), From 2004 till date Pain Management – Actively associated with running pain clinics from early seventies, starting from Safdarjung Hospital and AIIMS, New Delhi. Run a pain and Acupuncture clinic in the department, College of Medicine, University of Lagos for over 5 years, at Noida Medicare Centre, VIMHANS. Few publications have been made in International Journals. Dr Choudhury is the Founder Chairman & Pain Physician of Samvedana Hospital, which started its operations in April 2004. Samvedana Hospital is a specialty pain management hospital which provides integrated comprehensive pain management of all kinds of chronic pain, using modern interventional pain modalities; from simple trigger point injections to spinal cord stimulator implantation & intrathecal drug pumps. We combine scientifically proven complimentary therapies to interventional pain modalities for better results. Dr Choudhury also provides pain management service at JCI accredited Indraprastha Apollo Hospital, New Delhi. Dr Choudhury is an anaesthetist/ neuroanaesthetist by training and specializes in pain management. He has been to many reputed pain management centers as a visiting faculty, like Memorial Sloan Kettering Hospital NY, Barnes Hospital, Washington University, St Louis, and Central Texas Pain Centre (with whom Samvedana is associated). He has attended Annual meetings of Americal Academy of Pain Management, American Pain Society; the last being in May 2012 at Austin Texas. Dr Choudhury has been conducting many pain conferences & hands-on cadaver workshops with the help of prominent Indian & American Pain physicians. Held a "Chronic Pelvic Pain" conference in association with SIG group of International Association of Study of Pain. Many American pain physicians are faculty to Samvedana and they visit regularly for clinical & academic purposes. Organization
• Organizing Secretary, 1st International Conference on Trauma and Critical Care Nov. 22 –24, 1996. New Delhi.
• National president of Indian Society of Neuroanaesthesiology and Critical Care.( Two terms)
• Vice President, International Society for Study of Pain-Delhi Chapter.

Membership of Learned Associations

• Life Member – Indian Medical Association
• Member – National Academy of Medical Sciences – India
• Member – Indian Society of Anaesthesiologists
• Member – Society of Anaesthetists of West Africa
• Founder – Commonwealth Institute of Acupuncture and Natural Medicines (U.K) 
• Life Member – Indian Society for Study of Pain (Indian Chapter of International Association for Study of Pain)
• Life Member- Indian Society of Neuroanaesthesiology & Critical care
• Life Member –Indian Society for Pain Research And Therapy