Welcome to Vortex Physical Therapy & Balance


Vortex Physical Therapy & Balance specializes in physical therapy for vestibular and neurological disorders, as well as balance issues.

Our clinic was founded in 2011 by Diron Cassidy, PT, MPT, GCS as the first facility in Silicon Valley dedicated to the rehabilitation of vestibular disorders and balance problems. Our specialized physical therapists work one-on-one with clients to reduce dizziness and improve their balance. Using the latest techniques and evidence-based practices, along with state-of-the-art equipment, we can help you recover and return to the activities of daily life.

We regularly treat the following conditions:

  • Acoustic neuroma
  • BPPV / Vertigo
  • Cervicogenic dizziness
  • Concussion / mild traumatic brain injury (mTBI)
  • Disequilibrium and gait abnormalities
  • Labyrinthitis / Vestibular neuritis
  • Meniere’s disease
  • Parkinson’s disease
  • Persistent postural perceptual dizziness (3PD)
  • Peripheral neuropathy
  • Stroke
  • Vestibular hypofunction (bilateral / unilateral)
  • Vestibular migraine

No Doctor Referral Needed

Did you know? It’s California Law: You have direct access to a physical therapist. There are a number of benefits that come from Direct Access. Read more >>


During this crisis, Vortex is scheduling face-to-face visits with patients via telehealth and e-visits.

If you are experiencing BPPV, please call the office to discuss the situation with someone from our team.

We will continue working remotely through April 7, per state guidelines. Please stay safe at home to #flattenthecurve.