Specialties and Conditions I Treat

  • Neurology
  • Neurotology
  • Meniere Disease
  • Labyrinthitis
  • Vertigo
  • Vestibular Neuronitis
  • Migraine Disorders
  • Dizziness
  • Vestibular Diseases
  • Arnold-Chiari Malformation

Locations Where I Practice

Please note: Not all physicians schedule patients at each listed location. Please call the “Schedule an appointment” number shown above for scheduling assistance.

Education and Training

Medical Degree

University of Texas Medical Branch


University of Texas Medical Branch
7/1/1987 - 6/30/1990


UCLA Medical Center
7/1/1990 - 6/30/1992

More About My Work

My Background

Board Certification

American Board of Psychiatry & Neurology (Subspecialty: Neurology)

My Department



167 Patient Satisfaction Reviews

The overall patient satisfaction rating is an average of all patient responses to the six doctor communication related questions shown below from the Clinician and Group Consumer Assessment of Healthcare Providers and Systems survey. For additional information about the patient satisfaction survey, please visit our Patient Satisfaction Survey page.

The comments are submitted by patients and reflect their view and opinions. The comments are not endorsed by and do not necessarily reflect the views of Ohio State Wexner Medical Center.

  • Overall
    4.3 out of 5
  • Explains Things Clearly 4
  • Listens Carefully 4.2
  • Gives Understandable Instructions 4.1
  • Knows My Medical History 4.4
  • Shows Respect 4.2
  • Time Spent Together 4.7

25 Patient Comments

Reviewed on May 18, 2018

Dr. Oas is a brilliant doctor; I felt lucky to be able to see him again.

Reviewed on May 18, 2018

Professional and friendly. Used terminology that was sometimes hard to follow.

Reviewed on May 10, 2018

Every thing was great.

Reviewed on May 09, 2018

Exceptional attention to medical history, digestible explanation of medical issue.

Reviewed on May 08, 2018

Very thorough. Spent a good amount of time with me. The questions were somewhat overwhelming, but I understand he was just trying to get to the bottom of my issues. Sometimes he was hard to follow due to the speed & quantity of questions. Overall I really like Dr. Oas & I appreciate time & the questions because I feel like I finally have some answers. Now I can begin to recover.

Reviewed on Apr 17, 2018

I like Dr. Oas, he listened, got to the point & was competent & professional. A great person to be in charge of my care.

Reviewed on Mar 13, 2018

All good. He communicated well and appeared to have a genuine concern for my health and well being. Explained things in terms I could understand and was not arrogant or condescending. Good doc - I really liked him.

Reviewed on Mar 11, 2018

A nightmare.

Reviewed on Mar 08, 2018

I didn't get to ask any questions regarding my problem. The doctor seemed very knowledgeable and thorough but I felt rather confused when I left.

Reviewed on Mar 06, 2018

I travel over two hours, each way, to see Dr. John G. Oas. He is the best health care provider I have ever known. You are extremely lucky to have him on your staff, and I feel very lucky to have access to him in the state of Ohio. He is genuine, brilliant, and has an insatiable appetite for knowledge of best-practices research about what can help his patients. Dr. Oas is also very well-informed regarding the connections between nutritional health and emotional well-being in helping his patients to be as healthy as possible.

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Consulting and Related Relationships

At The Ohio State University Wexner Medical Center, we support a faculty member’s research and consulting in collaboration with medical device, research and/or drug companies because a faculty member’s expertise can guide important advancements in the practice of medicine and improve patient care. In order to provide effective management of these relationships, the University requires annual disclosures from all faculty members with external interests related to their University responsibilities.

As of 03/26/2018, Dr. Oas has reported no relationships with companies or entities.