See All Internal Medicine Doctors in Pittsburgh, PA
Dr. Thomas Mertz, DO

Dr. Thomas Mertz, DO

Age 52 Internal Medicine M
(15) 15 reviews
Accepting New Patients


Dr. Thomas Mertz, DO is a internal medicine specialist in Pittsburgh, PA. Dr. Mertz completed a residency at University of Connecticut Medical Center. He currently practices at Allergy and Asthma Associates of Pittsburgh and is affiliated with UPMC St. Margaret. He accepts multiple insurance plans. Dr. Mertz is board certified in Pediatrics.


  • Penn State-Allergy and Imunology, Fellowship Hospital — 2012
  • University of Connecticut Medical Center, Residency Hospital — 2008
  • University of Connecticut, Internship Hospital — 2005
  • Lake Erie College Of Osteopathic Medicin--Erie, Medical School — 2004
  • West Virginia Univ, Other Education — 2000
  • West Virginia University, Undergraduate School — 1998

Insurance Accepted

  • Aetna
  • Amerihealth
  • Anthem
  • Anthem Blue Cross Blue Shield
  • Blue Cross Blue Shield
  • Capital Blue Cross
  • CareFirst Blue Cross Blue Shield
  • Cigna
  • Commercial Insurance Company
  • Coventry Health Care
  • First Health
  • Guardian
  • Highmark Blue Cross Blue Shield
  • Humana
  • MultiPlan
  • Mutual of Omaha
  • UnitedHealthCare
  • UPMC
  • UPMC Health Plan

* Please verify this information when scheduling an appointment.

Compare with other Internal Medicine Specialists

Compare Dr. Mertz with our nearby Internal Medicine Specialists at Cleveland Clinic
These providers are on the medical staff of Cleveland Clinic
These providers are on the medical staff of Cleveland Clinic.

Patient Satisfaction

Likelihood to recommend Dr. Mertz
Based on 15 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star

Leave a review

How likely are you to recommend Dr. Mertz?

(Select your rating)
Feb 26, 2022
Out of the 10 Doctors I have seen at UPMC and AHN, Dr. Mertz was the only doctor to figure out that I had an IgG deficiency. He reviewed all of my records from when I was a child, during and after chemotherapy, did a number of test to figure out what I had. I’d recommend him to my friends and family. 10/10.
— Feb 26, 2022
See more reviews on Healthgrades
Photo: Dr. Thomas Mertz, DO
How would you rate your experience with Dr. Thomas Mertz, DO?
  • Likelihood of recommending Dr. Mertz to family and friends

Dr. Mertz's Office & Staff

  • Ease of scheduling urgent appointments
  • Office environment, cleanliness, comfort, etc.
  • Staff friendliness and courteousness
  • Total wait time (waiting & exam rooms)

Experience with Dr. Mertz

  • Level of trust in provider's decisions
  • How well provider explains medical condition(s)
  • How well provider listens and answers questions
  • Spends appropriate amount of time with patients

Tell Us About Yourself

  • Your gender:
  • Your age group:
  • Number of office visits you've had in the last 2 years:

Finish Here

  • How would you like to confirm your survey information?
    Standard text messaging and data rates may apply.
Thank you for sharing your feedback about Dr. Thomas Mertz, DO.
Claim Your Profile
Are you Dr. Thomas Mertz, DO?
Claim and manage your free profile or contact our support team.

Frequently Asked Questions

Find contact information here to make an appointment.

A list of accepted insurance providers is available on the Healthgrades insurance check. It is always a good idea to verify your insurance when making an appointment.

New patients are generally accepted by Dr. Thomas Mertz, DO on Sharecare. To arrange an appointment, call the number on Dr. Mertz's profile.

Dr. Mertz frequently treats the following conditions: Allergic Rhinitis, Pollen Allergy, and Animal Allergies. See more on Sharecare.

Dr. Thomas Mertz, DO is affiliated with UPMC St. Margaret and West Penn Hospital.

Yes, Dr. Thomas Mertz, DO holds board certifications in Pediatrics.

Dr. Mertz has over 18 years of healthcare experience.

There is a star rating of 4.5/5 for Dr. Thomas Mertz, DO. Patients say that the appointment wasn't rushed and the provider explained conditions well. See all patient feedback on Sharecare.

Hospital Affiliations

  • UPMC St. Margaret
  • West Penn Hospital


  1. Allergy and Asthma Associates of Pittsburgh

    1. 1
      Allergy and Asthma Associates
      2585 Freeport Rd Ste 210, Pittsburgh, PA 15238 (412) 828-3800
  1. Allergy and Asthma Associates of Pittsburgh

    1. 2
      Gateway Towers
      320 Fort Duquesne Blvd Ste 380, Pittsburgh, PA 15222 (412) 471-3818