Dr. Subramanian Natarajan

MD Pulmonary Medicine

18+ years of experience

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With esteemed credentials and commitment to respiratory & sleep medicine, Dr. Subramanian Natarajan is recognized as one of the best pulmonologists in Mumbai.

A national talent scholar, he completed his MBBS from Seth G.S. Medical College & KEM Hospital, then went on with an MD in pulmonary medicine and critical care medicine. His approach ensures specialized treatment for every patient, as Dr. Natarajan is also a leading sleep medicine specialist and somnologist in Mumbai, having established an advanced lab for an accurate treatment of conditions such as sleep apnea and insomnia in Mumbai.

At Remesleep, Dr. Natarajan offers expert care, treatments and diagnoses, helping patients sleep better. Making remesleep the best sleep clinic in Mumbai, ideally best for patients searching for a sleep doctor in Mumbai. Beyond his expertise, he also conducts lectures and awareness programs on the importance of sleep health and treating sleep apnea early.

He specializes in pulmonary medicine with expertise in treating sleep apnea in Mumbai, insomnia, and other sleep disorders. In addition, he offers advanced care for pulmonary issues, breathlessness, and lung health management. As a leading sleep specialist and somnologist in Mumbai, he provides expert care for individuals seeking the best sleep doctor or sleep apnea specialist near them.

We have all had those days, tossing, turning, staring at the ceiling, wondering why sleep just won’t come. It can be occasional, as an extra cup of coffee can throw anyone off.

But what if it’s not normal? It can be normal to have sleepless nights, but if you are having this almost every day. You may have a sleep disorder, “says sleep specialist Dr. Subramanian Natarajan. And here’s a thing, sleep problems don’t just make you tired. Left untreated, they can affect your heart, mood, weight, and overall quality of life.

If any of this sounds familiar to you, it might be time to dig deeper. And that’s where a slep study comes in.

A sleep study is also called a polysomnography, which is a totally painless, non-invasive test that monitors what happens to your body during sleep. It tracks your brain activity, breathing patterns, heart rate, oxygen levels and body temperatures/movements throughout the night.
The whole of this sleep study is to find out if you have a sleep disorder, and if there is one, what is actually causing it. Sleep studies can be done overnight or during the day, depending on what your sleep medicine specialist is looking for. Or they can be conducted at a specialised sleep centre, even in the comfort of your own home.
If you think you might have a sleep problem, the first step is to discuss your symptoms with a sleep doctor near you.

Who Should Get a Sleep Study?

As per the sleep experts, not everyone with a bad night’s sleep study. But if you are the one experiencing ongoing issues with sleep problems that affect your daily life, it is worth getting checked. You should consider seeing a sleep specialist if you have:
Snore loudly, especially if your partner says you stop breathing or gasp during sleep.
Feel excessively tired throughout the day, even after a full night’s rest.
Have been troubled falling asleep or staying up all night.
wake up countless times in the night for no obvious reasons.
Experience restless legs or an uncomfortable urge to move your legs at night.
Fall asleep unexpectedly in the middle of the day, at work, while driving, or in conversations.
Waking up with dry mouth, sore throat, and headaches often.
Have been struggling with focus, memory, or mood changes that seem linked to poor sleep.
If you have conditions like High BP, diabetes, heart disease, or obesity, your doctor might also recommend a sleep study. These conditions are closely linked to sleep apnea, and treating the sleep disorder can gradually improve your health condition.

The evaluation of sleep problems can be done at home or in a specialized sleep center by an experienced sleep study doctor that can study your sleep during the day or at night. The sleep specialist will decide which type of study is best to evaluate your sleep problem.

There are different types of studies conducted at night, called “overnight studies,” and they can be performed at home or in a sleep lab:

Home sleep testing: This study records breathing rate and airflow, heart rate, and oxygen levels and is performed in the home. A technician will train you in using the equipment and will not be present overnight during the study.

Full Polysomnography: This study is generally performed in a Polysomnography laboratory (lab). Several body functions are measured during sleep, including breathing, heart rate, body movements, brain activity, and eye movements. A technician is available and observing during the study.

Continuous Positive Airway Pressure Trial: This test is done to see how well you sleep while using nasal continuous positive airway pressure therapy (CPAP), a treatment for obstructive sleep apnea. As you sleep, CPAP delivers air to you through a mask placed over your mouth and nose or only over your nose. The air that flows into your lungs under slight pressure prevents the airways from narrowing or closing, allowing you to breathe normally and sleep well.

Split Night Study: This study is a combination of a full polysomnography and CPAP trial described above. In a split-night study, you sleep part of the night without the CPAP to see whether you have sleep apnea. If you have sleep apnea, you will sleep with CPAP the rest of the night. This study is also performed in a sleep lab.

Studies conducted during the day include: 

Multiple Sleep Latency Test (MSLT): This study is conducted to assess your daytime sleepiness. The MSLT is used most often to diagnose narcolepsy (inability to stay awake during the day) and see what might be causing your excessive daytime sleepiness.

Maintenance of Wakefulness Test (MWT): This study aims to assess your ability to remain awake in situations that typically induce sleepiness.

 
How Do I Prepare for a Sleep Study?

Preparing for a sleep study is simple. Here’s what to do:

Do:

  • Eat your regular meals on the day of the study
  • Shower and wash your hair before arriving
  • Bring comfortable sleepwear and any personal items you need (toothbrush, book, etc.)
  • Follow your normal bedtime routine as much as possible
  • Ask your healthcare provider about any medications you’re taking

Don’t:

  • Consume alcohol, caffeine, or chocolate for at least 24 hours before the study
  • Take naps on the day of your study
  • Use makeup, lotion, hair gel, hairspray, or cologne; these can interfere with the electrodes
  • Change your sleep schedule dramatically before the test
What Happens After My Sleep Study?

Once your study is complete, a sleep medicine specialist or sleep study doctor will analyse the data which includes reviewing your sleep stages, breathing patterns, oxygen levels, heart activity, and any movements or disturbances during the night.

A detailed report will be sent to your sleep doctor, usually within one to two weeks. You’ll then schedule a follow-up appointment to discuss the results. If the study shows you have a sleep disorder, your doctor will recommend a treatment plan. This might include:

  • CPAP or BiPAP therapy for sleep apnea
  • Oral appliances to keep your airway open
  • Medications for insomnia, narcolepsy, or restless leg syndrome
  • Lifestyle changes like weight loss, sleep hygiene improvements, or positional therapy
  • Cognitive behavioural therapy for insomnia (CBT-I), a highly effective, non-medication approach

Your insomnia specialist or sleep disorder doctor will work with you to find the best solution for your specific situation.

Benefits of Getting a Sleep Study

Still wondering if a sleep study is worth it? Here’s what you stand to gain:

  1. Accurate Diagnosis: Sleep disorders often overlap in symptoms. A sleep study provides objective data that helps your sleep medicine doctor pinpoint exactly what’s going on, so you’re not guessing or treating the wrong problem.
  2. Personalised Treatment Once you know what you’re dealing with, your doctor can create a treatment plan tailored to your needs. No more generic advice, just solutions that work for you.
  3. Better Sleep Quality This one’s obvious, but it’s worth saying: treating a sleep disorder means finally getting the restful, restorative sleep your body needs.
  4. More Energy During the Day. Say goodbye to that constant fatigue. When you sleep well, you wake up refreshed and ready to take on the day.
  5. Improved Health Untreated sleep disorders, especially sleep apnea, are linked to serious health issues like high blood pressure, heart disease, stroke, diabetes, and obesity. 
  6. Better Mood and Mental Clarity. Poor sleep affects your brain. You may notice improved focus, memory, and emotional stability once your sleep disorder is under control.
  7. Safer Days (and Nights) Excessive daytime sleepiness can be dangerous, especially if you drive or operate machinery. Treating your sleep problem keeps you and others safe.
  8. Happier Relationships: Snoring and restless nights don’t just affect you. Your partner’s sleep matters too. Treating your sleep disorder can improve life for everyone in the household.
When to See a Sleep Specialist?

If you’ve been struggling with sleep for weeks or months, it’s time to take action. You don’t have to keep pushing through exhaustion or accepting poor sleep as “just how it is.”

Consider consulting a sleep disorder specialist or an insomnia treatment doctor if:

  • Home remedies and lifestyle changes haven’t helped
  • Your sleep problems are affecting your work, relationships, or daily functioning
  • You’ve been told you snore loudly or stop breathing during sleep
  • You feel unsafe driving or working due to sleepiness
  • You have underlying health conditions that may be linked to poor sleep

And if you’re not sure where to start, an online sleep doctor consultation can be a convenient first step. Many sleep specialists now offer virtual appointments to review your symptoms and determine if a sleep study is right for you.

Take the First Step Toward Better Sleep

Sleep isn’t a luxury; it’s a necessity. And if something’s getting in the way of your rest, you deserve answers.

Whether it’s insomnia, sleep apnea, narcolepsy, or another sleep disorder, a sleep study can help identify the problem and set you on the path to better health.

If you’re in Mumbai and looking for an experienced sleep study doctor, Dr Subramanian Natarajan can help. With expertise in diagnosing and treating a wide range of sleep problems, Dr Natarajan and his team provide comprehensive care, from initial consultation to diagnosis to treatment.

Don’t let poor sleep control your life. Book a consultation today and take the first step toward the restful nights you deserve.

Our Clinic Locations:

Mumbai

Bangalore: If you are looking for an online consultation with the best sleep doctor in Bangalore, Call us directly at +919867227188 to book your consultation.

Areas of Expertise

  • Pulmonary & Critical Care Medicine
  • Sleep Apnea & Insomnia Diagnosis & Treatment
  • Advanced Sleep Lab Evaluations
  • Respiratory Disorders & Breathlessness
  • Comprehensive Sleep / Lung Health Management

Book an Appointment with the Best Sleep Apnea Doctor in Mumbai

At Remesleep, our sleep doctors provide expert evaluation and holistic treatment plans to help you sleep better and live healthier. Whether you’re searching for a sleep apnea doctor near me or a top pulmonologist for sleep disorders, Remesleep is your trusted destination. Book your consultation today.

Highly recommended to get Sleep peacefully

I had been struggling with sleepless nights and constant fatigue for almost three years. I came across RemeSleep, and their personalised treatment made all the difference. I’m now sleeping peacefully and feeling refreshed every morning. Thank you, RemeSleep, truly life-changing and highly recommended.

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My Son get benefit from Remesleep Solutions

He could not sleep at night for almost one month. My son got relief in two days and I am very much thankful to the doctor

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Snoring issue get resolved

I was motivated to try RemeSleep when my partner & I realized how much my snoring was affecting our sleep. The tailored sleep study & support from RemeSleep stood out. It’s been six months since I started & I am sleeping better

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IT Professional

Best Doctor for Sleep apnea in Mumbai

Since consulting Dr Poonam at RemeSleep, I no longer wake up multiple times during the night. This positive change has had a ripple effect on my overall well-being, making me more focused & energetic throughout the day

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Sales

Best doctor in Mumbai for Insomnia

I had been struggling with sleepless nights and constant fatigue for almost three years. I came across Remesleep, and their personalized treatment made all the difference. I’m now sleeping peacefully and feeling refreshed every morning. Thank you, Remesleep, truly life-changing and highly recommended!

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IT Professional

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I was diagnosed with insomnia and had been suffering for the past two years. I tried various treatments from top hospitals but never found a permanent solution. Then I got connected with Remesleep, went through their complete treatment, and now I can finally sleep well. Thanks to Remesleep ,  highly recommended to everyone!

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Best Doctor for Sleeping issue at night

He could not sleep at night for almost one month. My son got relief in two days and I am very much thankful to the doctor

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Best Doctor for snoring issue

I was motivated to try RemeSleep when my partner & I realized how much my snoring was affecting our sleep… It’s been six months since I started & I’m sleeping better.

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Frequently Asked Questions

  • He practices at Remesleep – Mulund West: 404, 4th Floor, Marathon Chambers, Above Maharajan Sarees, Near Panch Rasta, P.K. Road, Mulund West, Mumbai. Typical consultation timings listed as Mon-Sat 10:00 AM - 07:00/08:00 PM.  It’s advisable to call ahead to check availability, as his schedule may include procedures or therapies that take more time.

  • At the first consultation with a pulmonologist in Mumbai, such as Dr Natarajan, you should bring:
    • Previous chest X-rays/CT scans, if any, pulmonary function tests (PFTs) if done, sleep study (if sleep issues), and previous treatment history for lung/breathing issues.
    • This helps him assess the condition comprehensively, especially because his profile mentions Sleep Medicine & respiratory diagnostics.
  • You might consider consulting Dr. Natarajan if you have:
    • Persistent or chronic cough, unexplained breathlessness, or recurring respiratory infections.
    • Suspected sleep‐related breathing disorders (like sleep apnea, snoring, and insomnia tied to breathing).
    • Need for advanced diagnostic procedures (bronchoscopy, EBUS) or critical‐care respiratory support.
    • A desire for a specialist who engages in detailed explanation and individualized care.
    • Sleep medicine (including sleep apnea, insomnia), he operates a sleep lab.
    • Diagnostic interventions like bronchoscopy and EBUS.
    • He is known for a compassionate approach, taking care of complex respiratory cases and being patient-centric.
  • Dr. Natarajan is a chest physician/pulmonologist in Mumbai. He is associated with Remesleep (Sleep specialist in Mumbai) and his expertise includes respiratory medicine, critical care, sleep medicine (sleep apnea & insomnia), and diagnostic bronchoscopy & endobronchial ultrasound (EBUS).
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