About Dr. Frederic Dewil
Dr. Frederic Dewil is a sleep medicine physician at Institute for Sleep/Wake Disorders in Hackensack, NJ.
In Medicare's directory, Dr. Dewil is also listed under internal medicine, pulmonary disease, and critical care (intensivists).
Dr. Dewil graduated from State University of New York at Stony Brook, School of Medicine in 1986.
According to Medicare, Dr. Dewil accepts Medicare assignment.
Where Dr. Dewil practices
30 Prospect Avenue, Hackensack, NJ 7601
(551) 996-3732
Clinic rated 3.9 from 101 Google reviews
Other sleep physicians at Institute for Sleep/Wake Disorders
Questions about Dr. Frederic Dewil
Where does Dr. Frederic Dewil practice?
Dr. Frederic Dewil is listed at Institute for Sleep/Wake Disorders (Hackensack, NJ). Call the clinic to confirm before you book.
How do I make an appointment with Dr. Frederic Dewil?
Call Institute for Sleep/Wake Disorders at (551) 996-3732 and ask for Dr. Dewil. Ask whether you need a referral and whether your insurance is accepted.
What does Dr. Frederic Dewil specialize in?
Dr. Frederic Dewil specializes in sleep medicine, with internal medicine, pulmonary disease, and critical care (intensivists) also listed. Sleep medicine physicians diagnose and treat conditions such as sleep apnea, insomnia, narcolepsy, and restless legs syndrome.
Does Dr. Frederic Dewil accept Medicare?
Medicare's clinician directory lists Dr. Dewil as accepting Medicare assignment, which means agreeing to the Medicare-approved amount as full payment for covered services. Confirm with the clinic before your visit.
From the NPI registry (data through November 2, 2026) and Medicare's Doctors and Clinicians directory (released November 12, 2026). These are records physicians and clinics keep with the government, and they can lag behind changes. They do not show board certification. Are you Dr. Frederic Dewil, or is something here out of date? Let us know. Find a sleep doctor near you.