Our Medical Staff


Dr. N. Ramakrishnan

Dr. Babu K. Abraham

Dr. R. Senthil Kumar

Dr. Ashwin K Mani

Dr. Ramesh Venkataraman

Dr. Dedeepiya Devaprasad

Dr. R. Ebenezer

Dr. C. Vignesh

Dr. J. Devachandran

Dr. Raymond Dominic Savio

Dr. R. Pratheema

Dr. Meghena Mathew

Dr. Bharath Kumar

Tirupakuzhi Vijayaraghavan

Dr. Vijay

Chakkaravarthy . K. R.

Dr. N.C. Usha Rani

Dr. Ajay Padmanaban

Dr. Gaurav Sharma

Dr. Pavan Kumar

Dr. Sristi Patodia

Ms. Lakshmi Ranganathan


Dr. N. Ramakrishnan

AB (Internal Medicine), AB (Critical Care), AB (Sleep Medicine), MMM – Founder & Managing Director

Dr. Ramakrishnan is an American Board Certified in Internal Medicine, Critical Care Medicine & Sleep Medicine & also has a Master’s degree in Medical Management (MMM) from University of Southern California. He is a Fellow of American College of Physicians (FACP), American College of Chest Physicians (FCCM), American College of Critical Care Medicine (FCCM) and Indian Society of Critical Care Medicine (FISCCM). He has been practicing Critical Care Medicine for over 18 years and Sleep Medicine for over 16 years. He is currently Senior Consultant in Critical Care & Sleep Medicine and Director, Critical Care Services for Apollo Group of Hospitals. He established Nithra Institute of Sleep Sciences in 2004 which is the first- of-its- kind freestanding comprehensive sleep center. The Institute prides itself with being the first institution to offer University affiliated post-doctoral fellowship in Sleep Medicine and also being the first Sleep Center to be accredited by National Accreditation Board of Hospitals and Healthcare Organizations (NABG).

Dr. Ramakrishnan is currently Vice Chancellor of Indian College of Critical Care Medicine, the academic wing of Indian Society of Critical Care Medicine. He is the Immediate Past President of Indian Sleep Disorders Association (ISDA) and has been involved in designing the Indian Diploma in Sleep Medicine.

He was honored with fellowship amongst the first group of Sleep Medicine specialists in 2011 and also received Philips ISDA Oration. Dr. N. Ramakrishnan is keen on educating healthcare professionals and the general public on sleep problems and has authored books in Tamil and participates in healthcare awareness programs of print and visual media.


Dr. Babu K. Abraham

MD, MRCP - Director

He has a postgraduate degree in Medicine from the prestigious Kasturba Medical College in Manipal. He subsequently trained in Pulmonary Medicine in the United Kingdom and is a Member of Royal College of Physicians (MRCP), United Kingdom. He then pursued fellowship training in Critical Care Medicine at University of Toronto. He is currently a Senior Consultant in Pulmonary & Critical Care Medicine at Apollo Hospitals, Chennai. He is well respected as a clinician and teacher and has authored original publications in journals of repute. He is an examiner for the FNB Critical Care Exam and the IFFCM exam. He is the course director for ATLS course.


Dr. R. Senthil Kumar

MD, IDCCM, FICCM, EDIC - Director

He is currently a Senior Consultant in Critical Care Medicine at Apollo Hospitals, Chennai. He has a postgraduate degree in Anesthesia from Government Medical College, Nagpur, where he was ranked first in the university. He has completed the Indian Diploma in Critical Care Medicine (IDCCM), European Diploma in Intensive Care (EDIC). He also has a Fellowship in Pain Medicine.


Dr. Ashwin K Mani

AB (Internal Medicine), AB (Pulmonary), AB (Critical Care) - Director

Dr. Ashwin K Mani is American Board certified Pulmonary, Internal Medicine and Critical Care Medicine. He was trained at the prestigious Thomas Jefferson University Hospital, Pennsylvania. He has several original Publications and presented many presentations during conference in India and overseas. He is currently Consultant in-charge of the Critical Care Unit at Apollo First Med Hospitals, Chennai. Dr. Ashwin Mani has a special interest in interstitial lung disease, Pulmonary hypertension, ARDS and non invasive ventilation.


Dr. Ramesh Venkataraman

AB (Int Med), AB (Crit Care) - Director

Dr. Ramesh Venkataraman is American Board certified in Critical Care Medicine and is a Fellow of American College of Physicians (FACP), American College of Chest Physicians (FCCP), American College of Critical Care Medicine (FCCM) and Indian College of Critical Care Medicine (FICCM). He is a Senior consultant & the Academic Coordinator for Department of Critical Care Medicine at Apollo Hospitals, Chennai. He has completed a postdoctoral certification in clinical education and has a special interest in simulation based education.

Since 2007, he has been an active educator for the ISCCM and is one of the core organizers for Chennai Chapter’s highly sought after mechanical ventilation, hemodynamic monitoring and refresher courses. He has been an examiner for IDCCM and IFCCM examinations and a regular faculty in ISCCM national conferences. He is involved in the development of the 4C and the Critical Care Infectious Disease courses created by the Indian College of Critical Care Medicine.


Dr. V. Dedeepiya Devaprasad

MD, DNB, IDCCM - Consultant

He has a postgraduate degree in Internal Medicine from Government Stanley Medical College, Chennai and also National Board of Examinations. He has won several gold medals during his under graduation and post graduate studies and subsequently pursued the Indian Diploma in Critical Care Medicine and working as a consultant in Critical Care at Apollo Hospitals. He is currently pursuing post doctoral research in role of stem cells in healthcare.


Dr. R. Ebenezer

DNB(ANAES), IDCCM, IFCCM, EDIC – Consultant

He has graduated from Madurai Medical College and then completed his Masters in Anaesthesiology, apart from completing IDCCM AND IFCCM. He is a European diplomate in Intensive Care Medicine.


Dr. C. Vignesh

MD (Anaes), FNB (Critical Care), EDIC - Consultant

He has graduated from Perundurai Medical College & Research Centre, Perundurai and post graduate degree in anaesthesiology from Sri Ram Chandra Bhanj Medical College, Cuttack, Orissa. He worked as Senior Resident in the Dept. Of Anesthesia, JIPMER, Puducherry for couple of years. He completed his Fellowship, National Board of Examinations in Critical Care (FNB) and European Diplomate in Intensive Care Medicine (EDIC).


Dr. J. Devachandran

MD (Anaes), FRCA, MRCP, EDIC - Consultant

He has graduated from Chengalpattu Medical College and has a post graduate degree in Anaesthesia from Madras Medical College, where he won the best outgoing student award. He then underwent structured modular training in Anaesthesia in the UK and is a Fellow of the Royal College of Anaesthetists, London (FRCA). After completing his anaesthetic training in various hospitals in the North East of England, he subspecialised in Intensive care and obtained a joint CCT in Anaesthesia and Intensive care. Subsequently, he completed a fellowship in advanced critical care including trauma at Sunnybrook Hospital in Toronto, Canada. He holds a masters degree (MSc) in evidence based medicine awarded by the Teesside University, Middlesbrough and a certificate in medical education awarded by the Durham University, Durham, UK. He has also completed the European diploma in intensive care (EDIC). Currently, he is working as a senior consultant in critical care at Apollo speciality hospital – OMR.


Dr. Raymond Dominic Savio

MD (Internal Medicine), D.M (Critical Care), EDIC – Consultant

He completed his graduation from Rajah Muthiah Medical College, Annamalai University with the distinction of "best outgoing student" apart from various endowment awards. He secured his post graduation in Internal Medicine from J.S.S. medical college, Rajiv Gandhi University of Health Sciences and further, his super specialization in Critical Care from S.R.M.C., Sri Ramachandra University. He additionally holds a European Diploma in Intensive Care (EDIC) awarded by the European Society of Intensive Care Medicine. Currently, he is a consultant in Critical Care Medicine at Apollo Main Hospital.


Dr. R. Pratheema

DNB (Anaes), IDCCM, IFCCM ,EDIC - Consultant

She has graduated from Vinayaka Mission’s Kirupananda Variyar Medical College,Salem and completed her postgraduation in Anaesthesiology - Diplomate (DNB) in Anaesthesiology from National Board of Examinations, Delhi.

She also has completed Indian diploma in Critical care medicine (IDCCM), Indian Fellowship in Critical Care Medicine.(IFCCM) and European Diploma in Intensive Care (EDIC). She is currently pursuing her career at Apollo Speciality Hospitals, OMR.


Dr. Meghena Mathew

DNB, IDCCM, EDIC, Pursuing IFCCM - Consultant

She has graduated from Christian Medical College, Vellore and has completed post graduation in Pulmonary Medicine from National Board of Examinations, New Delhi (DNB). She has completed her Indian Diploma in Critical Care Medicine(IDCCM) and European Diploma in Intensive Medicine(EDIC) and is currently pursuing Indian Fellowship in Critical Care Medicine(IFCCM). She is currently working as Consultant in Apollo First Med Hospitals, Chennai.


Dr. Bharath Kumar Tirupakuzhi Vijayaraghavan

MD, DNB, EDIC - Consultant

He has a post graduate degree in Anaesthesiology from the prestigious Post Graduate Institute of Medical Education and Research(PGIMER), Chandigarh. He completed this with Honors and was awarded the Bronze Medal for academic excellence by PGI. He subsequently went on to complete Fellowships in Critical Care from National University Hospital, Singapore and Sunnybrook Health Sciences Centre, Toronto. He has also completed the European Diploma in Intensive Care and is currently working as Consultant at Apollo Hospitals, Chennai.

He is also pursuing a MSc in Clinical Trials from the prestigious London School of Hygiene and Tropical Medicine and is deeply passionate about research in Lower Middle Income Countries(LMICs). Specifically, he is interested in the establishment and development of research networks for critical care in LMICs and the epidemiology of critical illness in resource limited settings.


Dr. Vijay Chakkaravarthy . K. R.

DNB (Internal Medicine), IDCCM - Associate Consultant

He has graduated MBBS from JJM Medical College, Davangere. Then completed his post graduation in Internal Medicine from National Board of Examinations, New Delhi. Performed a year of formal training in Critical Care at Apollo Main Hospital, Greams road, Chennai and now he is an Associate Consultant at the same institution.


Dr. N.C. Usha Rani

M.D (Anaesthesiology) – Associate Consultant

She has graduated from Madras Medical College, Chennai and holds post graduate degree in Anaesthesiology from the same Institute. Currently works as Associate Consultant in Critical Care Unit at Apollo Speciality Hospitals, Vanagaram.


Dr. Ajay Padmanaban

M.D (Anesthesiology), IDCCM, Pursuing IFCCM - Associate Consultant

He has graduated from Rajah Muttiah medical college, Annamalai University and completed his post graduate degree in Anesthesiology from Postgraduate Institute of Medical education and research(PGIMER) Chandigarh. He has completed Indian diploma in critical care medicine(IDCCM). He is pursuing Indian fellowship in critical care medicine(IFCCM) in Apollo hospitals chennai and has completed EDIC Part1. Currently he is an Associate consultant in Critical care in Apollo speciality hospitals Teynampet Chennai.


Dr. Gaurav Sharma

MD (Anesthesiology), FNB (Critical Care Medicine) - Associate Consultant

He has graduated from Topiwala National Medical college, Mumbai. He has done his Postgraduate degree in Anesthesiology B J Medical College, Ahmedabad. He has completed his National Board Fellowship in Critical Care Medicine(FNB) from Apollo Hospital, Chennai. He has completed EDIC part1. He is presently working as associate consultant with Apollo Hospital Greams Road Chennai.


Dr. Pavan Kumar

MD (Anesthesiology), FNB (Critical Care Medicine) - Associate Consultant

He has graduated from Mahadevappa Rampure Medical College, Rajiv Gandhi University of Health Sciences (RGUHS ), Karnataka and holds a post-graduate degree in Anaesthesiology from Byramjee Jeejeebhoy Medical College (BJMC), Gujarat University. He has completed his National Board Fellowship course(FNB) in Critical Care Medicine at Sudhamayi Hospitals and Clinics, Amrita vishwavidypeetam, Kochi. Currently, he is an Associate Consultant in Critical Care Medicine at Apollo Speciality Hospital, Chennai.


Dr. Sristi Patodia

MD (General Medicine) - Associate Consultant

She graduated from Sri Ramachandra Institute of Higher Education and Research (formerly Sri Ramachandra Medical College & Research Institute), Chennai and went on to complete her MD in General Medicine, with a University Gold Medal. She has over 5 years of post MD experience with multispecialty hospitals across Chennai, particularly in the field of Critical Care. She has also completed formal training in Critical Care at the Apollo Main Hospital, Chennai, while pursuing the Indian Diploma in Critical Care Medicine (IDCCM). She is currently working as an Associate Consultant at Apollo Proton Cancer Centre (APCC), Taramani, Chennai.


Ms. Lakshmi Ranganathan Ph.D

Clinical Research Manager

Ms. Lakshmi Ranganathan is working with our team as Research Manager. She has completed post doctoral research and holds a PhD in Biochemistry.