About Us

About Us

Your Partner in Better Health

At Nithra Sleep and Health Care, we believe true health starts with sleep and is sustained through complete, connected medical care.

Today’s health problems—whether related to the heart, lungs, brain, digestion, mental health, or metabolism—are deeply interconnected with sleep and lifestyle. Treating them in isolation often leads to temporary results. That’s why we follow a multispeciality, root-cause approach to healthcare.


Nithra brings together expertise across:

Sleep Medicine, General Medicine, Pulmonology, Neurology, Psychiatry, Cardiology, Gastroenterology, ENT, Infectious Diseases, Pediatrics, Lifestyle Medicine, and Clinical Nutrition

—all under one roof to provide seamless, coordinated care.

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About Dr. Nagarajan Ramakrishnan

Dr. Nagarajan Ramakrishnan is an American Board Certified Specialist in Internal Medicine, Critical Care Medicine, Sleep Medicine, and Obesity Medicine, with a Master’s degree in Medical Management (MMM) from the University of Southern California. He is a Fellow of several prestigious medical organizations, including ACP, ACCP, AASM, and ISCCM. With over two decades of experience, he currently serves as Senior Consultant in Critical Care & Sleep Medicine and Director of Critical Care Services at Apollo Hospitals, and as Medical Director & Tele-Intensivist at Hicuity Health Care, USA. He is the Founder of TACT Academy and established the Nithra Institute of Sleep Sciences in 2004, India’s first comprehensive sleep centre. Dr. Ramakrishnan has held key leadership roles in ISCCM and ISDA and is a Past President of ISDA. He has authored multiple books, published over 100 research papers, and is a respected national and international speaker dedicated to medical education and public awareness.

Expectations & Code of Conduct

Interns are required to:

  • Be punctual and adhere to clinic timings.
  • Maintain professional behaviour in interactions with patients, caregivers, and staff.
  • Dress appropriately in a professional manner.
  • Respect patient privacy and confidentiality at all times.
  • Show initiative, curiosity, and active participation in academic and clinical discussions.
Our Vision

Building a Healthier World Through Better Sleep

  • Transforming community health and well-being through optimal sleep and healthy lifestyle.
  •  To be the most trusted healthcare partner for patient centred, integrated health care.
Quality Policy

Our Solutions

  • To inspire value and hope and improve lifelong health of our patients by providing comprehensive, high-quality and compassionate care through integrated clinical practice focusing on sleep and lifestyle modification
  • To empower individuals to reclaim their health and enhance their quality of life through accessible, expert care and education in sleep health and sustainable lifestyle practices
Why We Exist

Advancing Health Through Integrated Care

Health conditions today are interconnected—affecting the heart, lungs, brain, digestion, mental health, and overall lifestyle. While these issues are often treated separately, they are deeply linked to sleep, habits, and long-term health patterns.

At Nithra Sleep and Health Care, we focus on addressing the root cause of health problems through a comprehensive, multispeciality approach. With increasing lifestyle disorders and chronic conditions, early diagnosis and coordinated care are essential for improving overall well-being.


Founded by Dr. N. Ramakrishnan, India’s first American Board Certified Sleep Medicine specialist, Nithra has evolved into a comprehensive multispeciality healthcare center. We bring together expertise across Sleep Medicine, General Medicine, Pulmonology, Neurology, Psychiatry, Cardiology, Gastroenterology, ENT, Infectious Diseases, Pediatrics, Lifestyle Medicine, and Clinical Nutrition—all under one roof.

News & Journals

Stay Updated with the Latest in Sleep Health

Explore the latest news, research updates, medical journals, and expert insights from the world of sleep medicine, nutrition, and wellness. At Nithra, we bring you reliable information to help you stay informed about advancements in diagnosis, treatment, and healthy living.

To purchase the above publications please contact : +91 44 43502252 / +91 90949 99955, or Email: admin@nithra.com

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At Dentia, we’re dedicated to providing high-quality, personalized dental care for patients of all ages. Our skilled team uses the latest technology to ensure comfortable, efficient treatments and beautiful, healthy smiles for life.