About Dr. Cassandra Mullen
Dr. Cassandra Mullen is a sleep medicine physician at The Oregon Clinic in Portland, OR, and is also listed at 1 other location.
Dr. Mullen graduated from Georgetown University School of Medicine in 2018.
According to Medicare, Dr. Mullen accepts Medicare assignment and offers telehealth visits.
Where Dr. Mullen practices
1111 NE 99th Avenue, Suite 200, Portland, OR 97220
(503) 963-3030
Clinic rated 4.1 from 61 Google reviews
Questions about Dr. Cassandra Mullen
Where does Dr. Cassandra Mullen practice?
Dr. Cassandra Mullen is listed at The Oregon Clinic (Portland, OR) and The Oregon Clinic- Sleep Medicine (Portland, OR). Call the clinic to confirm before you book.
How do I make an appointment with Dr. Cassandra Mullen?
Call The Oregon Clinic at (503) 963-3030 and ask for Dr. Mullen. Ask whether you need a referral and whether your insurance is accepted.
What does Dr. Cassandra Mullen specialize in?
Dr. Cassandra Mullen specializes in sleep medicine. Sleep medicine physicians diagnose and treat conditions such as sleep apnea, insomnia, narcolepsy, and restless legs syndrome.
Does Dr. Cassandra Mullen accept Medicare?
Medicare's clinician directory lists Dr. Mullen 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. Cassandra Mullen offer telehealth?
Medicare's clinician directory lists Dr. Mullen 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. Cassandra Mullen, or is something here out of date? Let us know. Find a sleep doctor near you.