Dr. Thomas L. Mertz, DO.,PharmD., FAAAAI, FACAAI

"Dr Mertz is very informative, communicates and listens to his patients. I always recommend anyone with bad allergies and asthma to experience his Professionalism."

"I love seeing Dr. Mertz. I wish he’d been my doctor all my life. Do you know how some doctors get you in and out as soon as possible, and then you’re left wondering what they even said and what happened? Not Dr. Mertz. He genuinely takes the time, listens to me without interrupting, and gives me a range of options that I can then choose from. He’s made a real difference in my health, and if you’re looking for someone to help with allergies and asthma, I really recommend him."

"I had two long sessions of extensive allergy testing with Dr. Mertz and his staff. He spent a lot of time making sure I understood everything, and was comfortable. I loved his staff too. VERY comfortable experience with caring doctor and staff….You can see him at a Harmar Township location, as well as downtown…."

"I have always been impressed with Dr. Mertz and his office and wonderful staff. I went to get my allergy shot and the office was set up for social distancing. The staff was ready with sanitizing pens after each use. They were pleasant but careful. Dr. Mertz always spends time to make sure you are getting the best possible care."

"Wonderful doctor! He figured out I have asthma, which no other doctor has ever managed to test for and I've seen dozens. He also takes his time with patients (he saw me for nearly an hour). I've recommended him to multiple people already! He's well worth the drive to downtown Pittsburgh!"