The Center for Sleep & Wake Disorders  
Helene A. Emsellem, MD, FAASM
Medical Director

John R. Ruddy, MD
Linda C. Croom, ANPC
Annemarie Zabbara, PA-C
Sandy Evanson, PA-C







Fully Accredited by the AASM

The Center for Sleep & Wake Disorders is fully accredited by the American Academy of Sleep Medicine (AASM). The AASM developed its Standards for Accreditation to promote excellence in the provision of medical care for patients with sleep disorders. The Standards for Accreditation address the prerequisites for structural, professional and human resource, clinical and technical standards, emergency and quality assurance methods required for accreditation by the AASM... Read More

What Sets Us Apart

The Center for Sleep & Wake Disorders is a full service sleep center caring for patients with all disorders of sleep and wakefulness. Patients enjoy the advantages of an expertly trained staff, the latest diagnostic equipment, and personalized attention in a quiet and comfortable out-patient atmosphere. Our mission is to provide high quality, compassionate medical care on an individualized basis to all of our patients... Read More

Frequently Asked Questions (FAQ)

A new book by Dr. Helene Emsellem, Medical Director from The Center for Sleep & Wake DisordersA new book by Dr. Helene Emsellem, Medical Director from The Center for Sleep & Wake Disorders. Snooze or Lose
10 Snooze or Lose10 "No-War" Ways to Improve Your Teen's Sleep Habits
Click to here learn more

Poor Sleep May Lead to Too Much Stored Fat (NPR article)

Worse grades if you study instead of sleep!

NPR Morning Edition: sleep in families

Sleep Apnea Tied to Cancer (NY Times article)

Reasons to Use Your CPAP

Some Helpful Hints on How to Adapt to Your CPAP Successfully

The Race to Nowhere
NSF Ask the Expert: After your Sleep Study: CPAP and Sleep Apnea

NSF Ask the Expert: Women and Sleep Apnea

Messages to the Public - March 2008 “The Role of Sleep in Memory and Learning Conference”
Experts Weigh in Restless Legs Syndrome

We hope that you are all well and sheltering safely at home during these unprecedented days of the COVID-19 pandemic. We are conducting tele-medicine visits for new and returning patients, running home sleep tests for obstructive sleep apnea, virtual CPAP mask fittings with our sleep technologists, particpating in several clinical drug trials, and performing limited in-lab sleep studies for select patients. Let us know what we can do to help. Stay safe and sleep well.
Helene Emsellem, MD & The Dream Team

New Patients Register Here

Complete your Questionnaire***If you are submitting a new patient questionnaire, but not completing the registration form, please contact us to schedule an appointment.

RETURNING PATIENTS: Please contact us to schedule a follow-up appointment. After scheduling your appointment, please complete the Follow-up Questionnaire and bring it with you to your visit.

Current Customers Complete your Questionnaire Here

These online forms are on a SSL Secure Server and are HIPAA compliant. Any and all information you enter into these forms is 100% secure.

In order to comply with Federal regulations regarding the protection of electronic protected health information (ePHI), the Center for Sleep & Wake Disorders requires that all electronic communication with patients be via our secure patient portal unless this form is signed ahead of time. We can no longer use email to communicate with patients without this document on file.  Please note that we require that all electronic communication from patients to clinicians must be via the portal.
Click here to register for the portal, or click here to log in. When registering, only input your date of birth, do not enter your social security number or account number.

Click here to securely upload a file to us.

We are no longer participating providers for:

MultiPlan &

We will continue to see patients with these insurances on a fee-for-service basis
and will do our best to accommodate any
patients in need.

Clinical Research Trials

At The Center for Sleep & Wake Disorders, we believe that the exploration of innovative treatments and new medications for sleep disorders is essential to the growth of the field. Our participation in research studies keeps us on the forefront of sleep-related healthcare and allows us to offer our patients pioneering treatments for their disorders, if they wish to participate. Read More


At the Center for Sleep & Wake Disorders, our medical staff recognizes that patients with disorders of sleep and wakefulness require special attention. Our evaluation and treatment methods are based on a multidisciplinary, scientific approach to identifying and managing sleep/wake disorders.Our goal is to deliver individualized, comprehensive care by taking the time to understand your problem, make a correct diagnosis and plan an effective course of treatment.




5454 Wisconsin Ave.,
Suite 1725
Chevy Chase, MD 20815

Phone: 301-654-1575
Fax: 301-654-5658