Philip Diaz

Philip Diaz, MD

  • Critical Care Medicine
  • Pulmonary Disease

Appointments: (614) 293-4925

About Me

My focus is on caring for patients with chronic obstructive pulmonary disease (COPD). I also specialize in pulmonary rehabilitation for all patients who suffer from lung disease.

I believe in providing specialized, state-of-the-art and compassionate care to individuals with lung problems. Educating my patients is important to me. I feel very strongly about providing them an opportunity to participate fully in their own care.

Helping individuals make good decisions about their health is fundamental. My goal is to work together to achieve the best quality of life possible for them. Being able to do this makes me passionate about my career.

I love working at Ohio State. As the only academic medical center in central Ohio, we have the opportunity to provide world-class medical care, which includes the latest innovations.

When I'm not working, I like to relax with my family. I also enjoy sports. I'm an Ohio State football fan. As an undergraduate, I was captain of the Brown University tennis team.


  • Rated in the top 10 percent of physicians in the nation for patient satisfaction, 2014, 2015
  • Elected to the Alpha Omega Alpha Medical Honor Society, 1988
  • America's Best Doctors, 2002-present
  • National Institutes of Health (NIH) Study Section “Infections, Reproductive, Asthma and Pulmonary Epidemiology (IRAP),” Member 2009-2013
  • Named to the Castle Connolly list of America’s “Top Doctors” for 2017
  • Best Doctor in America 2017

Specialties and Conditions I Treat

  • Critical Care Medicine
  • Pulmonary Disease
  • Sleep Disorders
  • Intensive Care
  • Intensive Care Units
  • Pulmonary Medicine
  • Pulmonary Disease, Chronic Obstructive
  • Rehabilitation
  • Pneumonectomy

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

Penn State University


General Medicine
Ohio State University Wexner Medical Center
1/1/1986 - 1/1/1989


Pulmonary Disease
Ohio State University Wexner Medical Center
1/1/1989 - 1/1/1992

My Videos

More About My Work

My Background

Board Certifications

American Board of Internal Medicine

American Board of Internal Medicine (Subspecialty: Critical Care Medicine)

American Board of Internal Medicine (Subspecialty: Pulmonary Disease)

My Department

Internal Medicine

My Division

Pulmonary, Allergy, Critical Care and Sleep Medicine


146 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
    4.8 out of 5
  • Explains Things Clearly 4.8
  • Listens Carefully 4.9
  • Gives Understandable Instructions 4.8
  • Knows My Medical History 4.6
  • Shows Respect 4.9
  • Time Spent Together 4.8

12 Patient Comments

Reviewed on Feb 08, 2018


Reviewed on Feb 06, 2018

Very good.

Reviewed on Jan 21, 2018

Dr. Diaz was so easy to ask questions of and answered all questions. His personality makes one feel very comfortable and he seems to really know his "stuff." I had been seen by another pulmonologist for 8 wks. and nothing was improving. Dr. Diaz is looking at my health problems from completely different angle and said "we will get to the bottom of this."

Reviewed on Jan 11, 2018

He knows my situation and is very helpful. He works with me to control my asthma. He and his staff respond quickly to phone calls.

Reviewed on Dec 18, 2017

Dr. Diaz is terrific. likewise, he is very attentive, answers questions and an excellent physician

Reviewed on Dec 14, 2017

I'm very happy and grateful for the care I'm receiving.

Reviewed on Nov 23, 2017

Dr Diaz has helped me more than any other pulmonary doctor I have had in the past. If I have a question or concern that doesn't need immediate response. I send him a message thru My Chart. Most of the time I hear back from them with 12-24 hours. Sometimes it's with a nurse. But Dr. Diaz always calls me . Very Pleased.

Reviewed on Nov 16, 2017

Dr. Diaz is one of the best in his field, I know I have lived with asthma, emphysema, and COPD for years. When he comes in the room he brings a calm and peace with him. He always makes me feel like I am the only patient he has. He is very concerned about what I have to say. He is professional and compassionate.

Reviewed on Nov 12, 2017

Dr. Diaz is the best. Just love that guy.

Reviewed on Nov 05, 2017

Never bad.

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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 03/28/2017, Dr. Diaz has reported no financial relationships with medical device, research and/or drug companies.