Postgrad Med
HeartPericarditis, Constrictive
Dr. Thomas Paul Marnejon, DO
NPI1891898607PAC ID2365576741
- Medicare services, 2024
- 49
- Medicare patients, 2024
- 56
- Part D claims, 2024
- 129
- Publications
- 9
- Hospital affiliations
- 1
- Practice address
- 1044 Belmont Avenue, Youngstown, OH 44501
- Practice phone
- Call (330) 480-3022
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Marnejon'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 Paul Marnejon is an internist in Youngstown, Ohio
Dr. Marnejon practices at Mercy Health - St. Elizabeth Youngstown Hospital in Youngstown, Ohio, part of Bon Secours Mercy Health.
Dr. Marnejon's NPI, 1891898607, was assigned on September 7, 2006. Dr. Marnejon graduated from Philadelphia College of Osteopathic Medicine in 1987. Dr. Marnejon holds Ohio license 34004912.
NPI and contact details
- NPI
- 1891898607NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2365576741
- NPI enumeration date
- September 7, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (330) 480-3022
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas Paul Marnejon practices at Mercy Health - St. Elizabeth Youngstown Hospital in Youngstown, Ohio
Dr. Marnejon's primary practice is Mercy Health - St. Elizabeth Youngstown Hospital, at 1044 Belmont Avenue, Youngstown, OH 44501 in Mahoning County. The practice phone is (330) 480-3022.
- Mercy Health - St. Elizabeth Youngstown Hospital1044 Belmont Avenue, Youngstown, OH 44501 · Mahoning CountyPhone(330) 480-3022
Source: Dmand AI Affiliation Data
Dr. Thomas Paul Marnejon is affiliated with 3 sites of care and 2 medical groups
Dr. Marnejon's primary practice is Mercy Health - St. Elizabeth Youngstown Hospital in Youngstown, Ohio, part of Bon Secours Mercy Health. The medical group on file is Mercy Health Physicians. Dmand AI also links Dr. Marnejon to 2 more group practices and clinics and 1 medical group, each named with a free account.
Mercy Health Physicians2 group practices and clinicsNames with a free account1 medical groupName with a free account
See all 5 affiliations for Dr. MarnejonSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Thomas Paul Marnejon's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marnejon practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mercy Health - St. Elizabeth Youngstown Hospital | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Thomas Paul Marnejon is one of 4,708 internists in Ohio
Internal medicine is Dr. Marnejon's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Marnejon is licensed in Ohio.
Specialties and state licenses
- Internal medicine, OhioPrimary
Internists near Dr. Marnejon
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
4,708internists in Ohio143internists in Youngstown82internists at Mercy Health - St. Elizabeth Youngstown Hospital
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Thomas Paul Marnejon billed Medicare for 49 services in 2024
CMS data shows 49 Medicare services from Dr. Marnejon across 2 procedure codes in 2024, all of them office visits, for 56 Medicare patients. Medicare paid $2,633 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 202449
Medicare patients56
Paid by Medicare$2,633
Procedure codes2
Dr. Marnejon's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 342024: 4944%
Dr. Marnejon compared with the Ohio median for internists, 2024
- Dr. Marnejon
- Ohio median
- Medicare services
- 49vs 48790% below
- Medicare patients
- 56vs 19271% below
- Part D claims
- 13vs 29496% below
Medians across 4,703 internists in Ohio with Dmand AI profiles that report each measure.
Dr. Marnejon'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. Marnejon?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Marnejon and other internists in Ohio.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas Paul Marnejon treated 56 Medicare patients in 2024, average age 66
CMS counts 56 Medicare patients who saw Dr. Marnejon in 2024. The largest group is 65 to 74, with 23 patients. 75% of them have high blood pressure, and 68% have high cholesterol. 54% are also on Medicaid. Their average risk score is 1.73, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Marnejon's median patient age at 61, with 54% women.
Medicare patients, 202456
Average age66
Average risk score1.73
Also on Medicaid54%
Dr. Marnejon's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Marnejon's Medicare patients by sex, 2024
- Women2239%
- Men3461%
Chronic conditions among Dr. Marnejon's Medicare patients, 2024
- High blood pressure75%
- High cholesterol68%
- Diabetes48%
- Heart failure39%
- Arthritis38%
- Mood disorders34%
- Anxiety32%
- Depression32%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marnejon's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women54%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas Paul Marnejon wrote 129 Medicare Part D claims in 2024
In 2024, Dr. Marnejon wrote 129 Medicare Part D claims for 46 patients. 80% of them were for generic drugs. CMS names the drug for 13 of them, across 1 drug with 11 or more claims each, at $38 in total drug cost. In 2023, CMS named 47 claims across 3 drugs.
Part D claims, 2024129
Drugs named by CMS1
Total drug cost$38
Part D patients46
Dr. Marnejon's Part D claims by kind of drug, 2024
- Generic103 claims80%
- Brand-name and other26 claims20%
Dr. Marnejon'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 472024: 1372%
Drugs named by CMS: 1 in 2024, 3 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 Paul Marnejon takes part in Medicare
Dr. Marnejon 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 Paul Marnejon has 9 publications on record
Dmand AI links 9 papers to Dr. Marnejon, published from 2013 to 2021. 2013 was the busiest year, with 2. The most frequent topics are Catheterization, Central Venous, Catheterization, Peripheral and Magnetic Resonance Imaging. Dr. Marnejon's most frequent co-authors are Anthony F. Cutrona, Linh Pham, MD and Harneel Saini, DO.
Papers9
Years published2013 to 2021
Topics Dr. Marnejon writes about most
- Catheterization, Central Venous
- Catheterization, Peripheral
- Magnetic Resonance Imaging
- Ohio
Dr. Marnejon's most frequent co-authors
- Anthony F. Cutrona1 shared paper
- Linh Pham, MD1 shared paper
- Harneel Saini, DO1 shared paper
Recent publications by Dr. Marnejon
J Am Osteopath Assoc
Aneurysm, FalseAneurysm, InfectedAorta, Thoracic
See who Dr. Marnejon researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Marnejon works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Thomas Paul Marnejon received $224 in industry payments from 2016 to 2018
CMS Open Payments shows 15 general payments to Dr. Marnejon from 7 drug and device companies from 2016 to 2018. Food and beverage make up the largest share, 100% of the total. Boston Scientific Corporation paid the most, $59.
General payments to Dr. Marnejon by program year, 2016 to 2018
Companies that paid Dr. Marnejon the most, 2016 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thomas Paul Marnejon graduated from Philadelphia College of Osteopathic Medicine
Dr. Marnejon graduated from Philadelphia College of Osteopathic Medicine in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Thomas Paul Marnejon'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 DataDmand AI Org Hierarchy 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) |
| Training, board certification and memberships | Dmand AI Professional Profile 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 Paul Marnejon
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 Paul Marnejon's NPI number?
Dr. Thomas Paul Marnejon's NPI number is 1891898607. It was assigned on September 7, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas Paul Marnejon?
Dr. Thomas Paul Marnejon is an internist in Youngstown, Ohio. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Thomas Paul Marnejon practice?
Dr. Marnejon practices at 1044 Belmont Avenue, Youngstown, OH 44501. Dr. Marnejon's primary practice is Mercy Health - St. Elizabeth Youngstown Hospital in Youngstown, Ohio, part of Bon Secours Mercy Health. Dmand AI also links Dr. Marnejon to 2 group practices and clinics and 1 medical group.
What is Dr. Thomas Paul Marnejon's office phone number?
The practice phone on file for Dr. Marnejon is (330) 480-3022.
What is Dr. Thomas Paul Marnejon's medical license number?
Dr. Marnejon holds Ohio license 34004912.
Which hospitals is Dr. Thomas Paul Marnejon affiliated with?
Dr. Marnejon practices at Mercy Health - St. Elizabeth Youngstown Hospital in Youngstown, Ohio.
What medical group is Dr. Thomas Paul Marnejon part of?
Dr. Marnejon is linked to Mercy Health Physicians. Dmand AI links Dr. Marnejon to 1 more medical group.
Does Dr. Thomas Paul Marnejon accept Medicare?
Yes. CMS data shows Dr. Marnejon billed Medicare for 49 services in 2024, and Dr. Marnejon accepts Medicare assignment.
How many Medicare patients does Dr. Thomas Paul Marnejon see?
CMS counts 56 Medicare patients who saw Dr. Marnejon in 2024, with an average age of 66.
What services does Dr. Thomas Paul Marnejon bill to Medicare?
In 2024, Dr. Marnejon's most billed Medicare services were office visit, established patient (99214) and office visit, established patient (99213).
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Where did Dr. Thomas Paul Marnejon go to medical school?
Dr. Marnejon graduated from Philadelphia College of Osteopathic Medicine in 1987.
What drugs does Dr. Thomas Paul Marnejon prescribe most?
In 2024 Medicare Part D data, Dr. Marnejon's most prescribed drugs by claims were Warfarin Sodium.
Has Dr. Thomas Paul Marnejon received payments from drug or device companies?
CMS Open Payments shows $224 in general payments to Dr. Marnejon from 7 companies from 2016 to 2018. The largest total came from Boston Scientific Corporation.
How long has Dr. Thomas Paul Marnejon been practicing?
Dr. Marnejon graduated from medical school in 1987, 39 years ago.
Does Dr. Thomas Paul Marnejon do research?
Dmand AI links 9 publications to Dr. Marnejon, published from 2013 to 2021.
Who does Dr. Thomas Paul Marnejon publish with?
Dr. Marnejon's most frequent co-authors are Anthony F. Cutrona (1 shared paper), Linh Pham, MD (1 shared paper) and Harneel Saini, DO (1 shared paper).
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