Book An Appointment
In case of emergencies, don't wait.
Call National Emergency Number
112
Alternatively you may contact Raftaar Emergency Seva to check service availability near you.
Call: 1800 233 00 00
Book An Appointment
In case of emergencies, don't wait.
Call National Emergency Number
112
Alternatively you may contact Raftaar Emergency Seva to check service availability near you.
Call: 1800 233 00 00

Dr. N. Ramakrishnan

Sleep Medicine | Critical Care | Internal Medicine

Appointment With Doctor
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Dr. N. Ramakrishnan

MBBS, MD, MRCP, DM, FRCP, FSCAI, FACC

America Board Certified – Internal Medicine, Critical Care Medicine, Obesity Medicine
& Sleep Medicine

25 Years of Experience

SPECIALIZATION

  • Obstructive Sleep Apnea (OSA)
  • Insomnia
  • Parasomnias (e.g., sleepwalking, night terrors)
  • Narcolepsy
  • Circadian Rhythm Disorders, including shift work-related sleep issues
  • Restless Leg Syndrome and other limb movement disorders
  • Sleep-related symptoms that affect patients with:
    • Hypertension
    • Diabetes
    • Heart disease
    • Neurological conditions
    • Psychiatric disorders

LANGUAGES

  • English
  • Tamil

REGISTRATION

TNMC 45732

 
Chennai

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Professional Summary

Dr. N. Ramakrishnan is a globally respected physician and one of India’s foremost experts in Sleep Medicine, Critical Care, and Internal Medicine. American Board Certified in all three specialties and trained in the U.S., he brings over 25 years of pioneering clinical, academic, and leadership experience to the forefront of modern Indian healthcare.
A visionary in his field, Dr. Ramakrishnan has transformed how India delivers sleep and intensive care from founding the country’s first Tele-ICU, to establishing India’s first NABH-accredited standalone sleep center, and leading simulation-based healthcare training for professionals and laypersons alike.
His unique combination of clinical excellence, innovation, and public health advocacy has earned him wide recognition both in India and internationally.

Awards & Honors

Fellowships:

Fellow, American College of Physicians (FACP)
Fellow, American College of Chest Physicians (FCCP)
Fellow, American College of Critical Care Medicine (FCCM)
Fellow, American Academy of Sleep Medicine (FAASM)
Fellow, Indian College of Critical Care Medicine (FICCM)
Fellow, Indian Sleep Disorders Association (FISDA)
Key Initiatives & Roles
Founder, Nithra Institute of Sleep Sciences (est. 2004)
• India’s first freestanding comprehensive sleep center
• First in India to offer a university-affiliated post-doctoral fellowship in Sleep Medicine
• First NABH-accredited sleep center in India
Founder & Managing Director, TACT Academy for Clinical Training
• India’s first simulation-based healthcare training Centre
Former Roles in Associations:
• Vice Chancellor – Indian College of Critical Care Medicine (ICCM)
• Charter Secretary – ICCM
• Past President – Indian Sleep Disorders Association (ISDA)
• Executive Committee Member – Indian Society of Critical Care Medicine (ISCCM)
Academic Contributions
Over 100 peer-reviewed abstracts and publications
Author of books in Critical Care and Sleep Medicine
Invited speaker at national and international medical conferences
Active in training doctors and public awareness programs

Honours:

• Best Doctor Award
• Young Achiever Award
• Vocational Excellence Award (Rotary International)
• Acharya Award for Excellence in Teaching
• Presidential Citations – Indian Society of Critical Care Medicine

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