About Dr. Gerard Diefes
Dr. Gerard Diefes is a sleep medicine physician at Pulmonary and Sleep Specialists in Exton, PA.
In Medicare's directory, Dr. Diefes is also listed under pulmonary disease, internal medicine, and critical care (intensivists).
Dr. Diefes graduated from Hahnemann University College of Medicine in 1992.
According to Medicare, Dr. Diefes accepts Medicare assignment and offers telehealth visits.
Where Dr. Diefes practices
Other sleep physicians at Pulmonary and Sleep Specialists
Questions about Dr. Gerard Diefes
Where does Dr. Gerard Diefes practice?
Dr. Gerard Diefes is listed at Pulmonary and Sleep Specialists (Exton, PA). Call the clinic to confirm before you book.
How do I make an appointment with Dr. Gerard Diefes?
Call Pulmonary and Sleep Specialists at (610) 359-5858 and ask for Dr. Diefes. Ask whether you need a referral and whether your insurance is accepted.
What does Dr. Gerard Diefes specialize in?
Dr. Gerard Diefes specializes in sleep medicine, with pulmonary disease, internal medicine, 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. Gerard Diefes accept Medicare?
Medicare's clinician directory lists Dr. Diefes 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.
Does Dr. Gerard Diefes offer telehealth?
Medicare's clinician directory lists Dr. Diefes as offering telehealth. Ask the clinic which visits can be done remotely; a sleep study itself usually happens at home or in a lab.
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. Gerard Diefes, or is something here out of date? Let us know. Find a sleep doctor near you.