About Dr. John Ruddy
Dr. John Ruddy is a sleep medicine physician at Golden Gate Sleep Centers in Fremont, CA, and is also listed at 1 other location.
Dr. Ruddy graduated from Georgetown University School of Medicine in 1980.
According to Medicare, Dr. Ruddy accepts Medicare assignment and offers telehealth visits.
Where Dr. Ruddy practices
Other sleep physicians at these clinics
Questions about Dr. John Ruddy
Where does Dr. John Ruddy practice?
Dr. John Ruddy is listed at Golden Gate Sleep Centers (Fremont, CA) and Golden Gate Sleep Centers (San Ramon, CA). Call the clinic to confirm before you book.
How do I make an appointment with Dr. John Ruddy?
Call Golden Gate Sleep Centers at (925) 820-4472 and ask for Dr. Ruddy. Ask whether you need a referral and whether your insurance is accepted.
What does Dr. John Ruddy specialize in?
Dr. John Ruddy specializes in sleep medicine. Sleep medicine physicians diagnose and treat conditions such as sleep apnea, insomnia, narcolepsy, and restless legs syndrome.
Does Dr. John Ruddy accept Medicare?
Medicare's clinician directory lists Dr. Ruddy 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. John Ruddy offer telehealth?
Medicare's clinician directory lists Dr. Ruddy 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. John Ruddy, or is something here out of date? Let us know. Find a sleep doctor near you.