Physician, Professor
Critical Care Medicine, Pulmonary Disease
Department: Internal Medicine
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.
Please note: Not all physicians schedule patients at each listed location.
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.
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 11/3/2025 Dr. Diaz has reported relationships with the companies or entities listed below. If you have questions about the relationships listed below, please ask the faculty member. If you have questions about how these relationships are monitored by The Ohio State University Wexner Medical Center, please contact our Compliance Office.
Dr. Diaz is the best. He is kind, patient, and very knowledgeable.
Professional, caring
I think so highly of Dr Diez that I've referred friends to him.
Always a great provider
He's great. He listens and includes my opinions and thoughts. I have absolutely no concerns with my treatment.
Dr. Diaz is the best pulmonologist ever. He's caring and very knowledgeable. I would recommend him to anyone.
Dr. Diaz. Is always friendly, appears concerned and questions me about how I'm doing
Excellent and took care of getting all the information he needed from me.
very good
Good
All good
Dr Diaz is truly amazing he answers questions and you feel that he really cares I have never had a bad experience
Extremely knowledgeable, explored treatment options, my care was paramount to this provider
Doctor was kind and understandable.
Excellent
Dr. Diaz is simply the BEST. He knows my history with COPD very well, always listens intently, and thoroughly explains all my treatment options.I not only consider him to be an excellent doctor, but a good friend as well. That is Indeed very rare!
Doctor Philip Diaz, is the BEST!!!Your facilities in my opinion is the best in the state.
Very good
He listened to me. Looked me in the eyes when I was talking (Not all doctors do) I felt completely heard.
Excellent
Dr. Diaz is wonderful. He is easy to talk to and explains in detail what is going on with my COPD. My husband and I feel very lucky to have found him.
The best
I have been seeing Dr. Diaz as my pulmonologist for over 20 years. He is excellent in his specialty.
I never have bad experiences with Dr. Diaz, he is without a doubt the best doctor I have ever had.
Dr Diaz is a great doctor
Excellent..!
Clinical notes on this visit have not been posted on my chart.
Outstanding! Professional yet personable, informative and caring.
Dr. Philip Diaz and Mahasti are great healthcare providers. They care. They talk. They explain. They listen. They respond. Who could ask for more.
No complaints very good very helpful and explained what would happen
He made sure he understood what I was trying to say and was very thorough
Absolutely
I love him. He is a excellent doctor
Dr Diaz is excellent Doctor
Dr. Diaz has been wonderful. He is such a good listener. I am most appreciative of his efforts to teach me strategies to cope better. His Respiratory Therapy Program taught me a lot of very useful information as well. I am so appreciative to him for the care he has shown me.
Dr. Diaz is the best!!
All very good bb
Seemed to care. Really listened
They were very attentive when hearing of my experiences, and reasonable when discussing adjustments to prescription drugs. Even though they are the experts, they showed respect for my empirical experiences.
The same is true of the doctor; he handled my emotions as well as my disease.
Dr. Diaz is very knowledgeable, informative and very respectful answering questions and treating me as a whole person.
Dr Diaz is awesome.
He was very polite and listened to my concerns
Very kind listened closely to everything I had to say. Explained everything very well to me and made sure I understood everything. He was kind and curious!! Wonderful Doctor!! Need more Doctors like him!!
My comfort level is very high with dr Diaz and his team
Dr. Diaz always acts aggressively to my health problems.
All good
All good
Enjoy the doctor he was very knowledgeable and so helpful.
Awesome
Dr. Diaz in my opinion is exceptional. He listens and spends the time explaining what my condition is and the things and meds I can use to help with the problem. He is just a very uplifting person. I am so glad we found him.
Dr Diaz has always been an excellent doctor and I will definitely continue to see him for my health care.
I was EXTREMELY lucky to get Dr Diaz
All good
Dr Diaz is amazing. His bad side demeanor is amazing and the trust he had in me as I was explaining my health issues. He listened and then explained the direction we were going.
I was reassured that my COPD is mild! Thank goodness because no provider has explained this to me.