Dr. Thomas Mertz, DO

Allergy & ImmunologyMale

Dr. Thomas Mertz, DO is a Allergy & Immunology Specialist in Pittsburgh, PA and has over 17 years of experience in the medical field. Dr. Mertz has more experience with Environmental Allergies than other specialists in his area. He graduated from Lake Erie College Of Osteopathic Medicin--Erie medical school in 2004. He is affiliated with medical facilities such as Upmc Shadyside and UPMC St. Margaret. Be sure to call ahead with Dr. Mertz to book an appointment.

Dr. Mertz

Allergy and Asthma Associates of Pittsburgh

2585 Freeport Rd Ste 210 Pittsburgh, PA 15238

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At a Glance

  • Explains Conditions Well
    Patients said this doctor explains conditions well. See reviews
  • Practices at Top Hospital
    Patient Safety Excellence Award™ See hospitals
  • Hospital Satisfaction
    Patients said they were highly satisfied at this doctor's hospital. See hospitals

Experience and Background Checks


Background Check

Healthgrades does not collect malpractice claims information for Pennsylvania
No disciplinary actions found for the years we collect data
No board actions found for the years we collect data
Learn more about background checks

Frequently Treated by Dr. Mertz

Based on treatment records, we have identified the following as areas of care that Dr. Mertz treats more often than their peers. If you are unsure whether Dr. Mertz treats other conditions, please contact the office at (412) 828-3800.

Environmental Allergies

Compare with other Environmental Allergies specialists.

Dr. Mertz is experienced in the area of Environmental Allergies. See the graph below to learn more about his experience.

Based on claims data for 14 conditions and procedures

Dr. Mertz
Similar Providers
Allergic Rhinitis
Pollen Allergy
Animal Allergies
Allergic Conjunctivitis
Very High

Check Dr. Mertz's experience treating your condition or procedure

Dr. Mertz's conditions and procedures:

  • Abdominal Pain
  • Acute Upper Respiratory Infection
  • All Types of Food Poisoning
  • Allergen Immunotherapy
  • Allergic Conjunctivitis
  • Allergic Disorders
  • Allergic Reactions to Food
  • Allergic Reactions to Insect Stings
  • Allergic Reactions to Medications
  • Allergic Rhinitis
  • Allergic Rhinoconjunctivitis
  • Allergy Shots
  • Allergy Shots for Insect Stings
  • Allergy Skin Testing
  • Allergy Testing
  • Allergy Testing for Hypersensitivity to Insects
  • Allergy Treatment
  • Anaphylaxis
  • Angioedema
  • Animal Allergies
  • Arthritis
  • Arthritis of the Elbow
  • Asthma
  • Atopic Dermatitis (Eczema)
  • Blood Allergy Testing
  • Breath Testing
  • Bronchitis
  • Chronic Sinusitis
  • Combined Immunity Deficiency
  • Contact Dermatitis
  • COPD (Chronic Obstructive Pulmonary Disease)
  • Cough
  • Dermatitis
  • Dermatitis Due to Food
  • Dermatitis Due to Substances Taken Internally
  • Drug Allergy Testing
  • Drug or Food Challenge
  • Dry Eyes
  • Dry Skin
  • Dyslipidemia
  • Dysphagia
  • Earwax Buildup
  • Eczema and Contact Dermatitis Due to Cosmetics
  • Eczema and Contact Dermatitis Due to Metals
  • Eosinophilia
  • Food Allergy
  • Food Poisoning
  • Gastroesophageal Reflux Disease (GERD)
  • Heart Disease
  • Hereditary Angioedema
  • Hives
  • Hyperlipidemia
  • Hypertension
  • Hypogammaglobulinemia
  • Hypothyroidism
  • IgM Deficiency
  • Immunization Administration
  • Immunodeficiency Syndromes
  • Itchy Skin
  • Joint Pain
  • Lactose Intolerance
  • Limb Swelling Caused by Fluid Overload
  • Lipid Disorders
  • Lung Spirometry
  • Malaise and Fatigue
  • Nasopharyngitis
  • Nausea
  • Nosebleed
  • Obesity
  • Osteoarthritis
  • Osteoarthritis of Ankle and Foot
  • Osteoarthritis of Shoulder
  • Overweight
  • Patch Testing
  • Penicillin Allergy
  • Pinkeye (Conjunctivitis)
  • Pollen Allergy
  • Postnasal Drip
  • Radioallergosorbent Test
  • Rash
  • Shortness of Breath
  • Sinusitis
  • Skin Allergy
  • Skin Testing and Screening
  • Sleep Apnea
  • Sulfonamide Allergy
  • Tobacco Use Disorder
  • Toxic Effect of Venom
  • Wheezing

Insurance Check

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Dr. Mertz accepts

Accepted insurance can change. Please double-check when making an appointment.

(412) 828-3800

Dr. Mertz accepts the following insurance:

Aetna HMO
Choice Plus POS II
Personal Choice PPO
National (BlueCard) PPO
Anthem Blue Cross Blue Shield
HealthKeepers Plus POS
Blue Cross Blue Shield
Blue Card PPO
Capital Blue Cross
CareFirst Blue Cross Blue Shield
Blue Choice Advantage
Blue Preferred PPO
HealthyBlue 2.0
HealthyBlue Advantage
Cigna PPO
Open Access Plus
Commercial Insurance Company
Coventry Health Care
Carelink HMO
First Health (Coventry Health Care)
First Health (Coventry Health Care) PPO
DentalGuard Preferred
Highmark Blue Cross Blue Shield
Classic Blue
Choice Care PPO
MultiPlan PPO
Mutual of Omaha
Navigate HMO
United Healthcare
UPMC Health Plan

Dr. Mertz's Reviews

Likelihood to recommend Dr. Mertz


Based on 14 ratings

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1 Star
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Dr. Mertz
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What went well
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What could be improved
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RecentHighestLowestMost Helpful
I see Dr. Mertz at the downtown office and would recommend him to all my family and friends. He achieved what other doctor's could not and that was find what was causing my head congestion and allergies. I have one negative complaint and that is the billing department. I had a billing question and tried calling at 3:15 pm. I was told the biller leaves at 3:00 pm, so if I had a question I should call before that which is unheard of and very inconvenient.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
4 people found this helpful
Robert in Pittsburgh, PA – Jan 27, 2018
×Post a ResponseAre you Dr. Thomas Mertz, DO?
Dr. Mertz is a very skilled, detailed, professional, and pleasant doctor that leaves no stone unturned. He was instrumental in my husband and myself and getting our allergies pinpointed and other issues resolved.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
9 people found this helpful
W in Pittsburgh, PA – Oct 24, 2016
×Post a ResponseAre you Dr. Thomas Mertz, DO?

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About Me

Care Philosophy

My philosophy is to care for the whole person and treat patients as if they were family. I also have a PharmD. and practiced pharmacy for 10 years prior...Read more


  • Allergy & Immunology
  • Internal Medicine
  • Pediatrics

Board Certifications


Penn State-Allergy and Imunology
Fellowship Hospital
University Of Connecticut Medical Center
Residency Hospital
University of Connecticut
Internship Hospital
Lake Erie College Of Osteopathic Medicin--Erie
Medical School
West Virginia Univ
West Virginia University
Undergraduate School


  • English
  • Spanish


  • Healthgrades Honor Roll
  • Internal Medicine Intern of the Year UCONN, 2005

Media & Publications

Frequently Asked Questions

Does Dr. Thomas Mertz, DO accept my insurance?

Use the Healthgrades insurance check to verify if Dr. Mertz accepts your insurance.

What are Dr. Thomas Mertz, DO's top areas of care?

Dr. Mertz frequently treats Environmental Allergies. See all practice areas where Dr. Mertz specializes.

Where is Dr. Thomas Mertz, DO's office located?

Dr. Mertz's office is located at 2585 Freeport Rd Ste 210, Pittsburgh, PA 15238. Find other locations and directions on Healthgrades.

What languages does Dr. Thomas Mertz, DO speak?

Dr. Mertz speaks Spanish and English. View profile to see all.

Does Dr. Thomas Mertz, DO offer telehealth services?

Dr. Mertz has not yet indicated whether they offer telehealth services. Please contact the office to check for availability/eligibility.

How can I make an appointment with Dr. Thomas Mertz, DO?

Find contact information here to make an appointment.


Allergy and Asthma Associates of Pittsburgh

Allergy and Asthma Associates2585 Freeport Rd Ste 210 Pittsburgh, PA 15238

Affiliated Hospitals

Dr. Mertz is affiliated with the following hospitals. Select a hospital below to learn more.

Learn more about how Healthgrades measuresHospital Quality.

Upmc Shadyside

Pittsburgh, PA

3 Awards Received

UPMC St. Margaret

Pittsburgh, PA

75% Patient Experience Rating, 6% higher than the national average

7 Awards Received

West Penn Hospital

Pittsburgh, PA

78% Patient Experience Rating, 9% higher than the national average

3 Awards Received

Award Highlight: Patient Safety Excellence Award™ (2020)