J Allergy Clin Immunol
AllergensHeteropteraHypersensitivity
Dr. Thomas L. Mertz, DO, PharmD
NPI1942495825PAC ID8426121724
- Medicare services, 2024
- 3,488
- Medicare patients, 2024
- 196
- Part D claims, 2024
- 1,591
- Publications
- 3
- Hospital affiliations
- 2
- Practice address
- 2585 Freeport Rd Suite 210 Suite 210, Pittsburgh, PA 15238-1426
- Practice phone
- Call (412) 828-3800
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Allergy & Asthma Associates Of Pittsburgh
Multi-specialty group site · Pittsburgh, Pennsylvania
Find Dr. Mertz's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Thomas L. Mertz is an allergist and immunologist in Pittsburgh, Pennsylvania
Dr. Mertz practices at Allergy & Asthma Associates Of Pittsburgh in Pittsburgh, Pennsylvania.
Dr. Mertz's NPI, 1942495825, was assigned on September 13, 2007. Dr. Mertz graduated from LECOM at Seton Hill - Greensburg in 2004. Dr. Mertz holds Pennsylvania license OS015695.
NPI and contact details
- NPI
- 1942495825NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8426121724
- NPI enumeration date
- September 13, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (412) 828-3800
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas L. Mertz practices at Allergy & Asthma Associates of Pittsburgh in Pittsburgh, Pennsylvania
Dr. Mertz's primary practice is Allergy & Asthma Associates of Pittsburgh, at 2585 Freeport Rd Suite 210 Suite 210, Pittsburgh, PA 15238-1426. The practice phone is (412) 828-3800.
- Allergy & Asthma Associates of Pittsburgh2585 Freeport Rd Suite 210 Suite 210, Pittsburgh, PA 15238-1426Phone(412) 828-3800
Source: Dmand AI Affiliation Data
Dr. Thomas L. Mertz is affiliated with 3 sites of care and 1 medical group
Dr. Mertz's primary practice is Allergy & Asthma Associates Of Pittsburgh in Pittsburgh, Pennsylvania. Dr. Mertz is also affiliated with UPMC Passavant-McCandless. The medical group on file is Allergy and Asthma Associates of Pittsburgh. Dmand AI also links Dr. Mertz to 1 more hospital, named with a free account.
Allergy & Asthma Associates Of PittsburghPrimary
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Thomas L. Mertz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mertz practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Allergy & Asthma Associates Of Pittsburgh | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Thomas L. Mertz is one of 133 allergists and immunologists in Pennsylvania
Allergy and immunology is Dr. Mertz's primary specialty in the NPI Registry, under taxonomy code 207K00000X. Dr. Mertz is board certified in allergy & immunology by the American Board of Allergy and Immunology. Dmand AI has Dr. Mertz's licenses on file in 2 states: Pennsylvania and Connecticut.
Specialties and state licenses
- Allergy and immunology, PennsylvaniaPrimary
- Internal medicine, Connecticut
Clinical focus
Dmand AI lists acid reflux, acute sinusitis, asthma, chronic nasal allergies, chronic obstructive pulmonary disease (COPD), chronic sinusitis, conjunctivitis and contact dermatitis among the conditions Dr. Mertz treats.
Allergists and immunologists near Dr. Mertz
Counts of allergists and immunologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Thomas L. Mertz billed Medicare for 3,488 services in 2024
CMS data shows 3,488 Medicare services from Dr. Mertz across 10 procedure codes in 2024, for 196 Medicare patients. Medicare paid $39,836 for them. Every service was in an office.
Medicare services, 20243,488
Medicare patients196
Paid by Medicare$39,836
Procedure codes10
Dr. Mertz's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 1,5572024: 3,287111%
- Office and hospital visits
- 2023: 1452024: 20139%
Dr. Mertz compared with the Pennsylvania median for allergists and immunologists, 2024
- Dr. Mertz
- Pennsylvania median
- Medicare services
- 3,488vs 9473.7 times
- Medicare patients
- 196vs 13941% above
- Part D claims
- 1,462vs 3274.5 times
Medians across 129 allergists and immunologists in Pennsylvania with Dmand AI profiles that report each measure.
Dr. Mertz's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Mertz?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mertz and other allergists and immunologists in Pennsylvania.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas L. Mertz treated 196 Medicare patients in 2024, average age 72
CMS counts 196 Medicare patients who saw Dr. Mertz in 2024. The largest group is 65 to 74, with 117 patients. 71% of them have high cholesterol, and 62% have high blood pressure. Their average risk score is 0.79, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Mertz's median patient age at 54, with 64% women.
Medicare patients, 2024196
Average age72
Average risk score0.79
Dr. Mertz's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Mertz's Medicare patients by sex, 2024
- Women13569%
- Men6131%
Chronic conditions among Dr. Mertz's Medicare patients, 2024
- High cholesterol71%
- High blood pressure62%
- Arthritis59%
- Asthma51%
- Anxiety25%
- Osteoporosis25%
- COPD19%
- Diabetes15%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mertz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women64%
- Men35%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas L. Mertz wrote 1,591 Medicare Part D claims in 2024
In 2024, Dr. Mertz wrote 1,591 Medicare Part D claims for 332 patients. 76% of them were for generic drugs. CMS names the drug for 1,462 of them, across 25 drugs with 11 or more claims each, at $263,333 in total drug cost. In 2023, CMS named 1,191 claims across 23 drugs.
Part D claims, 20241,591
Drugs named by CMS25
Total drug cost$263,333
Part D patients332
Dr. Mertz's Part D claims by kind of drug, 2024
- Generic1,209 claims76%
- Brand-name382 claims24%
Dr. Mertz's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Mertz's Part D claims, 2024
- Antibiotics1%12 of 1,591 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,1912024: 1,46223%
Drugs named by CMS: 25 in 2024, 23 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Thomas L. Mertz takes part in Medicare
Dr. Mertz accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Thomas L. Mertz has 3 publications on record
Dmand AI links 3 papers to Dr. Mertz, published from 2011 to 2012. Dr. Mertz's most frequent co-authors are Timothy J. Craig, DO and Shenil S. Shah, MD.
Papers3
Years published2011 to 2012
Dr. Mertz's most frequent co-authors
Recent publications by Dr. Mertz
Allergy Asthma Proc
Complement C2Shock, SepticStreptococcal Infections
See who Dr. Mertz researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Mertz works with, so you can find a warm path to the right allergists and immunologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Thomas L. Mertz received $466 in industry payments from 2017 to 2022
CMS Open Payments shows 7 general payments to Dr. Mertz from 6 drug and device companies from 2017 to 2022. Food and beverage make up the largest share, 97% of the total. Genentech, Inc. paid the most, $118.
General payments to Dr. Mertz by program year, 2017 to 2022
General payments to Dr. Mertz by kind, 2017 to 2022
$466in total
- Food and beverage$45197%
- Education$153%
Companies that paid Dr. Mertz the most, 2017 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thomas L. Mertz has 1 award and honors on record
Dmand AI lists 1 award for Dr. Mertz, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Mertz
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Thomas L. Mertz graduated from LECOM at Seton Hill - Greensburg
Dr. Mertz graduated from LECOM at Seton Hill - Greensburg in 2004. Dr. Mertz is a member of AAAAI, ACOI, ACP, AMA and AOA.
- Medical school
- Board certified in allergy & immunology
- Board certified in internal medicine
- Board certified in internal medicine
- Board certified in pediatrics
- Board certified in 2008 - 2011
- Board certified in 1995 - 2007
- Board certified in 2000 - 2026
Source: Dmand AI Professional Profile Data
Dr. Thomas L. Mertz accepts plans from 17 insurance carriers
Dr. Mertz is in network with 17 carriers, including Aetna, Elevance and Highmark. PPO plans come from the most carriers, 11. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Highmark
- HCSC
- United Healthcare
- Cigna
- Aspirus Health Plan
- Blue Cross Blue Shield of Massachusetts
- +9 more carriersWith a free account
Plan types Dr. Mertz accepts, by number of carriers
- PPO11
- Medicare10
- HMO9
- POS6
- EPO5
Source: Dmand AI Insurance Network Data
Sources for Dr. Thomas L. Mertz's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Thomas L. Mertz
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Thomas L. Mertz's NPI number?
Dr. Thomas L. Mertz's NPI number is 1942495825. It was assigned on September 13, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas L. Mertz?
Dr. Thomas L. Mertz is an allergist and immunologist in Pittsburgh, Pennsylvania. The primary specialty in the NPI Registry is Allergy & Immunology Physician (taxonomy code 207K00000X).
Where does Dr. Thomas L. Mertz practice?
Dr. Mertz practices at 2585 Freeport Rd Suite 210 Suite 210, Pittsburgh, PA 15238-1426. Dr. Mertz's primary practice is Allergy & Asthma Associates Of Pittsburgh in Pittsburgh, Pennsylvania. Dmand AI also links Dr. Mertz to 1 hospital.
What is Dr. Thomas L. Mertz's office phone number?
The practice phone on file for Dr. Mertz is (412) 828-3800.
What is Dr. Thomas L. Mertz's medical license number?
Dr. Mertz holds Pennsylvania license OS015695, one of the licenses on file in 2 states.
Which states has Dr. Thomas L. Mertz been licensed in?
Dmand AI has state licenses on file for Dr. Mertz in Pennsylvania and Connecticut.
Which hospitals is Dr. Thomas L. Mertz affiliated with?
Dr. Mertz is affiliated with UPMC Passavant-McCandless. Dmand AI links Dr. Mertz to 1 more hospital.
What medical group is Dr. Thomas L. Mertz part of?
Dr. Mertz is linked to Allergy and Asthma Associates of Pittsburgh.
Does Dr. Thomas L. Mertz accept Medicare?
Yes. CMS data shows Dr. Mertz billed Medicare for 3,488 services in 2024, and Dr. Mertz accepts Medicare assignment.
How many Medicare patients does Dr. Thomas L. Mertz see?
CMS counts 196 Medicare patients who saw Dr. Mertz in 2024, with an average age of 72.
Show 9 more questionsShow fewer questions
Is Dr. Thomas L. Mertz board certified?
Yes. Dr. Mertz is board certified in allergy & immunology by the American Board of Allergy and Immunology.
What services does Dr. Thomas L. Mertz bill to Medicare?
In 2024, Dr. Mertz's most billed Medicare services were allergy test or treatment (95004), allergy test or treatment (95117) and allergy test or treatment (95165).
Where did Dr. Thomas L. Mertz go to medical school?
Dr. Mertz graduated from LECOM at Seton Hill - Greensburg in 2004.
What drugs does Dr. Thomas L. Mertz prescribe most?
In 2024 Medicare Part D data, Dr. Mertz's most prescribed drugs by claims were Montelukast Sodium, Fluticasone Propionate and Azelastine HCl.
Has Dr. Thomas L. Mertz received payments from drug or device companies?
CMS Open Payments shows $466 in general payments to Dr. Mertz from 6 companies from 2017 to 2022. The largest total came from Genentech, Inc.
How long has Dr. Thomas L. Mertz been practicing?
Dr. Mertz graduated from medical school in 2004, 22 years ago.
Does Dr. Thomas L. Mertz do research?
Dmand AI links 3 publications to Dr. Mertz, published from 2011 to 2012.
Who does Dr. Thomas L. Mertz publish with?
Dr. Mertz's most frequent co-authors are Timothy J. Craig, DO (2 shared papers) and Shenil S. Shah, MD (1 shared paper).
What insurance does Dr. Thomas L. Mertz accept?
Dr. Mertz is in network with 17 carriers, including Aetna, Elevance and Highmark. PPO plans come from the most carriers, 11. Check the plan with the practice before a visit.
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