Sleep Division

The Division of Sleep Medicine at Massachusetts General Hospital provides sophisticated diagnostic testing and comprehensive treatment options for people struggling with any kind of sleep problem.

The goal of the Division of Sleep Medicine is to advance the gold standard of care in the emerging field of sleep medicine.

Our approach to treating sleep disorders encompasses both clinical work and research. As a leading teaching hospital, we have the following clinical goals:

  • To treat every patient with the considerable resources at our disposal
  • To train physicians who eventually will be caring for their own patients with sleep disorders
  • To educate patients and disprove common cultural misconceptions about sleep

Part of the Neurology Department

We are one of the few sleep divisions in the nation housed within a hospital's neurology department. This arrangement creates numerous benefits for our division and our patients.

For instance, we have access to sophisticated technology that allows us to take higher-resolution snapshots of brain activity during sleep studies--and gain a deeper understanding of what is happening in the brain during sleep. In addition, we can tap into the expertise of outstanding neurological specialists from elsewhere in the department.

Patient Testimonials

AdusumilliWhen his doctor couldn't find a solution to his ongoing sleep issues, Jon, 66, sought help from an expert- Dr. Josna Adusumilli, sleep expert at MGH Neurology.  After a sleep study and a consultation with Jon, Dr. Adusumilli was able to connect his medication for Restless Leg Syndrome to contributing to his sleep issues, as well as diagnosing a sleep disorder, sleep apnea.  Now off his RLS medication and enjoying sleep again with the help of a CPAP mask, Jon says, "the level of sophistication and comprehensive care I'm getting here at MGH is such a contrast to my former provider.  I'm really grateful. Dr. Adusumilli has been fantastic-such a great help.  She was the perfect person to see."

A Multidisciplinary Team

The science of diagnosing and treating sleep disorders should be approached from many different angles. Our team of sleep experts regularly meets to review complex cases together. Specialists from across the hospital's psychiatry, pulmonary and pediatric groups also meet with our sleep physicians to review our most complex cases, particularly those interacting with their specialties. The collective knowledge of these experts gives us multilayered insight into how to effectively manage a complex case.

By taking a collaborative approach to sleep medicine, we can address even the most complex cases. We also streamline the patient experience. Rather than being shuffled back and forth among various specialists, patients enjoy a centrally managed, seamlessly integrated course of treatment.

A First-Rate Sleep Laboratory

In 2007 the Division of Sleep Medicine took a major step forward with the opening of our world-class sleep laboratory. Located in a separate building next to the hospital, this eight-bed diagnostic center is one of the few U.S. facilities hosting sleep studies in a "hotel-like" environment. In an effort to continually advance the field of sleep medicine, we also participate in research programs with other sleep labs.

Our sleep lab sets new standards for the patient experience. The rooms are quiet and comfortable. A technician is always on hand to monitor the patient and offer assistance. And cutting-edge technology enables us to conduct complicated tests, either overnight or during the daytime. As a result, we generate far more useful insights into the patient condition than home studies ever could.

Our multi-physician division is headed by Bianchi, Matt, MD, PhD.  Each member of our group cares for patients over the full spectrum of sleep disorders.  It is the mission of our sleep laboratory to provide the highest level of diagnostic and therapeutic services for sleep apnea, insomnia, and other sleep disorders.  Our active ambulatory clinic provides consultation and chronic care for patients with a spectrum of sleep disorders.  The division also hosts cutting edge clinical research in the areas of the two most common sleep disorders: sleep apnea and insomnia.

Patients seeking our services suffer from a variety of sleep disorders including:

  • Insomnia
  • Narcolepsy
  • Nocturnal seizures
  • Parasomnia (e.g. acting out dreams)
  • Restless legs syndrome
  • Sleep apnea

Patients who suspect they might have a sleep disorder should speak with their primary care physician, who might want to order a sleep study (see below) and/or a consultation from our staff of sleep experts.

Safe, Informative Testing for Sleep Disorders

The Division of Sleep Medicine's sleep laboratory features an eight-bed diagnostic center for testing outpatients. For comfort and convenience, it is located at the Holiday Inn, immediately next to Mass General. As we tell our patients, coming to the sleep lab is similar to checking in to a hotel.

This state-of-the-art facility allows us to safely and efficiently deliver overnight testing (in the form of sleep study called a polysomnogram) and daytime testing (including the multiple sleep latency test, or MSLT) in a home-like atmosphere. Testing for young children and challenged adults is often performed in the main hospital. All of our facilities are wheelchair-accessible.

Depending on the requests of their primary care physician, patients might have a sleep study that is interpreted by our team of sleep physicians. They might also be seen by one of our sleep physicians in his or her clinic during the daytime. After the patient completes the study, a specialist is available to discuss the results and develop a personalized treatment plan.

Our division conducts innovative studies that produce significant breakthroughs in diagnosing and treating patients. For information about ongoing studies and the ability to participate, please call 617-724-7419.


Referrals are accepted from primary care physicians and other specialists by calling 617-724-7426. We require a completed Sleep Study Requisition form which can be downloaded as a PDF. Please print, complete and fax to 617-724-6513.

Our Staff

Margaret Merlino, Chief Technician


Updated 1/02/15

Restless Legs Syndrome (RLS)

Restless legs syndrome (RLS) is a sleep disorder in which a person experiences unpleasant sensations in the legs.

Sleep Apnea

Sleep apnea is a serious breathing disorder that causes brief interruptions of breathing during sleep.


Snoring is the sound that occurs during sleep when flow of air is obstructed in the area where the tongue and upper throat meet the soft palate and uvula.

Sleep Research: Do Try This At Home

About 10 percent of Americans suffer from sleep apnea, a disorder of nighttime breathing that disrupts sleep but often goes undiagnosed. Apnea can lead to daytime drowsiness, which puts people at risk of accidents and injuries. Poor sleep due to apnea or other causes also raises the chances of developing high blood pressure, diabetes, depression, heart disease and stroke.

New year, better sleep

Better sleep is a resolution that should be on everyone’s list, according to Josna Adusumilli, MD, an MGH neurologist and sleep specialist. But when it comes to sleep, how much is enough and what is the best way to get restful sleep? Adusumilli explains.

The Division of Sleep Medicine Receives Program Accreditation

The Division of Sleep Medicine at Massachusetts General Hospital in Boston recently received program accreditation from the American Academy of Sleep Medicine (AASM).

Continuing Medical Education in Neurology

The Neurology Service at Mass General offers Continuing Medical Education through Harvard Medical School.

Partners Neurology Residency

Neurology residents, program graduates, faculty members, and the education director talk about training at Mass General Hospital and Brigham and Women’s Hospital.

Division of Sleep Medicine, Department of Neurology

Wang Ambulatory Care Center
Division of Sleep Medicine, Neurology
15 Parkman Street, Wang ACC 720
Boston, MA 02114

Phone: 617-724-7426
Fax: 617-724-6513

Public Transportation Access: yes
Disabled Access: yes

Adult Overnight Outpatient Testing Unit 

Massachusetts General Hospital
Division of Sleep Medicine, Department of Neurology
Wyndham Hotel
5 Blossom Street
Boston, MA 02114

Patient Frequently Asked Questions 

Download FAQ PDF

Q: What is your office contact information?
A: Phone: 617-724-7426
Fax: 617-724-6513

Q: Where is the clinic location?
A: Our clinics are at the following locations:
Wang Building, Floor 8, Suite 835
Wang Building, Floor 7, Suite 720
Wyndham Hotel 2nd Floor, 5 Blossom St. Boston MA 02114

Q: What is your mailing address?
A: Attn: Sleep Unit
Wang 720
55 Fruit Street
Boston, MA 02114

Q: What is required in order to schedule a new patient appointment?
A: Most recent office visit note from your referring doctor explaining why the patient needs to be seen and if it is for a consult for Sleep Study. (If for Sleep Study what kind: Diagnostic, Split or Titration Study).
We need copies of any prior Sleep Studies

Q: What is my doctor’s NPI number for an insurance referral?
A: Dr. Matt Bianchi: 1881715084
Dr. John Stakes: 1871570325
Dr. Kenneth Sassower: 1619968179
Dr. John Winkelman: 1619950045
Dr. Josna Adusumilli: 15686633789
Dr. Deirdre O’rourke: 1194092858

Q: How can I obtain a copy of my medical records from the Sleep Unit?
A: You will need to complete the MGH Release of Information form and either fax or mail it back to our office. The release form can be found here.

Q: Where do I have my PCP fax my insurance referral to?
A: Referrals Office fax: 781-960-1265

Q: How do I know if my insurance will cover my visit?
A: Please call your insurance company to verify that your appointment or test will be covered. You can also contact our Financial Access Unit at 617-726-6828.

Q: How do I update my demographic and insurance information?
A: Please contact our Registration and Referrals Center at 866-211-6588

Q: How long will it take for me to receive my test results and how will they be communicated to me?
A: For Sleep Study results it will take 2-3 weeks for the results to be ready.  Once they are ready they are sent to the patients referring doctor and they will need to contact the patient to review.

Next Steps: