Meet Our Pain and Spine Specialists

Our doctors use an integrative approach to pain management that looks at the whole person and focuses on getting to the root cause of your pain.

Knowledge. Experience. Commitment.

Whether you live in Los Angeles, Thousand Oaks or elsewhere in Ventura county, PMIR Medical Center physicians are committed to helping you achieve lasting pain relief with the safest and most advanced pain management procedures available.


Alexander P. Hersel, M.D.

PMIR Medical Center Founder
Pain and Spine Specialist,

It was during my anesthesiology residency that I began to truly understand how chronic pain works. Today, I spend a lot of time with my patients to understand the source of their pain, and I use both Western and alternative therapies to help ease it. When you walk in my office, I truly want the best for you. I don’t settle for mild success but believe in the completion of what we started together.
– Dr. Alexander Hersel

Bradley Spiegel, M.D.

Pain and Spine Specialist,

I enjoy educating my patients about their pain process so they can become more actively involved in their treatment. Because every patient’s pain process is unique, I want to get to know the patient and learn how their pain is affecting them. This way, I can develop a multidisciplinary treatment plan that takes in the totality of who they are and offers the best results.
– Dr. Bradley Spiegel

Armen Haroutunian, M.D.

Pain and Spine Specialist,

Cassandra Montoya, PA-C

Physician Assistant