About Dr. Brian Kossak
Dr. Brian Kossak is a sleep medicine physician at New Hampshire Sleep Medicine in Nashua, NH, and is also listed at 1 other location.
In Medicare's directory, Dr. Kossak is also listed under neurology.
Dr. Kossak completed medical school in 1986.
According to Medicare, Dr. Kossak accepts Medicare assignment and offers telehealth visits.
Where Dr. Kossak practices
280 Main Street, Suite 441, Nashua, NH 03060
(603) 577-2062
Clinic rated 5 from 1 Google review
Sleep Center At Southern NH Medical Center, 29 Northwest Boulevard, Nashua, NH 03063
(603) 577-2273
Clinic rated 5 from 1 Google review
Questions about Dr. Brian Kossak
Where does Dr. Brian Kossak practice?
Dr. Brian Kossak is listed at New Hampshire Sleep Medicine (Nashua, NH) and Southern NH Health-Sleep Center (Nashua, NH). Call the clinic to confirm before you book.
How do I make an appointment with Dr. Brian Kossak?
Call New Hampshire Sleep Medicine at (603) 577-2062 and ask for Dr. Kossak. Ask whether you need a referral and whether your insurance is accepted.
What does Dr. Brian Kossak specialize in?
Dr. Brian Kossak specializes in sleep medicine, with neurology also listed. Sleep medicine physicians diagnose and treat conditions such as sleep apnea, insomnia, narcolepsy, and restless legs syndrome.
Does Dr. Brian Kossak accept Medicare?
Medicare's clinician directory lists Dr. Kossak 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. Brian Kossak offer telehealth?
Medicare's clinician directory lists Dr. Kossak 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. Brian Kossak, or is something here out of date? Let us know. Find a sleep doctor near you.