Dr. Gregary D. Marhefka, MD
- Medicare services, 2024
- 1,725
- Medicare patients, 2024
- 563
- Part D claims, 2024
- 2,447
- Publications
- 30
- Clinical trials
- 1
- Practice address
- 111 South 11th Street, Philadelphia, PA 19107
- Practice phone
- Call (215) 955-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Marhefka'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. Gregary D. Marhefka is a cardiologist in Philadelphia, Pennsylvania
Dr. Marhefka practices at Thomas Jefferson University Hospital in Philadelphia, Pennsylvania, part of Thomas Jefferson University.
Dr. Marhefka's NPI, 1649226184, was assigned on May 26, 2006. Dr. Marhefka graduated from Sidney Kimmel Medical College at Thomas Jefferson University in 1998. Dr. Marhefka holds Pennsylvania license MD423362.
- NPI
- 1649226184NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8022024553
- NPI enumeration date
- May 26, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (215) 955-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregary D. Marhefka practices at Thomas Jefferson University Hospital in Philadelphia, Pennsylvania
Dr. Marhefka's primary practice is Thomas Jefferson University Hospital, at 111 South 11th Street, Philadelphia, PA 19107 in Philadelphia County. The practice phone is (215) 955-6000.
- Thomas Jefferson University Hospital111 South 11th Street, Philadelphia, PA 19107 · Philadelphia CountyPhone(215) 955-6000
Source: Dmand AI Affiliation Data
Dr. Gregary D. Marhefka is affiliated with 5 sites of care and 2 medical groups
Dr. Marhefka's primary practice is Thomas Jefferson University Hospital in Philadelphia, Pennsylvania, part of Thomas Jefferson University. Dr. Marhefka is also affiliated with Beebe Healthcare. The medical group on file is Jefferson University Physicians. Dmand AI also links Dr. Marhefka to 2 more hospitals, 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregary D. Marhefka's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marhefka practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Thomas Jefferson University Hospital | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Thomas Jefferson University and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Gregary D. Marhefka is one of 1,206 cardiologists in Pennsylvania
Cardiovascular disease is Dr. Marhefka's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dmand AI has Dr. Marhefka's licenses on file in 2 states: Pennsylvania and New Jersey.
Specialties and state licenses
- Cardiovascular disease, PennsylvaniaPrimary
- New Jersey license
Cardiologists near Dr. Marhefka
Counts of cardiologists 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. Gregary D. Marhefka billed Medicare for 1,725 services in 2024
CMS data shows 1,725 Medicare services from Dr. Marhefka across 18 procedure codes in 2024, for 563 Medicare patients. Medicare paid $102,943 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Marhefka's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 6672024: 77817%
- Office and hospital visits
- 2023: 8692024: 77411%
- Other services
- 2023: 02024: 128
- Imaging
- 2023: 212024: 45114%
Dr. Marhefka compared with the Pennsylvania median for cardiologists, 2024
- Dr. Marhefka
- Pennsylvania median
- Medicare services
- 1,725vs 1,745Close to median
- Medicare patients
- 563vs 85534% below
- Part D claims
- 2,170vs 1,66930% above
Medians across 1,207 cardiologists in Pennsylvania with Dmand AI profiles that report each measure.
Dr. Marhefka'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. Marhefka?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Marhefka and other cardiologists in Pennsylvania.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregary D. Marhefka treated 563 Medicare patients in 2024, average age 74
CMS counts 563 Medicare patients who saw Dr. Marhefka in 2024. The largest group is 65 to 74, with 249 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 15% are also on Medicaid. Their average risk score is 2.08, 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. Marhefka's median patient age at 69, with 44% women.
Dr. Marhefka's Medicare patients by age, 2024
Dr. Marhefka's Medicare patients by sex, 2024
- Women24744%
- Men31656%
Chronic conditions among Dr. Marhefka's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease63%
- Arthritis51%
- Heart failure50%
- Chronic kidney disease45%
- Atrial fibrillation43%
- Diabetes39%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marhefka's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women44%
- Men54%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregary D. Marhefka wrote 2,447 Medicare Part D claims in 2024
In 2024, Dr. Marhefka wrote 2,447 Medicare Part D claims for 275 patients. 82% of them were for generic drugs. CMS names the drug for 2,170 of them, across 40 drugs with 11 or more claims each, at $480,975 in total drug cost. In 2023, CMS named 2,047 claims across 40 drugs.
Dr. Marhefka's Part D claims by kind of drug, 2024
- Generic2,014 claims82%
- Brand-name433 claims18%
Dr. Marhefka'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. Marhefka's Part D claims, 2024
- Antibiotics1%16 of 2,447 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: 2,0472024: 2,1706%
Drugs named by CMS: 40 in 2024, 40 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
Dr. Gregary D. Marhefka offers telehealth to Medicare patients
Dr. Marhefka accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Marhefka as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Pacemaker insertion or repair: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Gregary D. Marhefka has 30 publications on record
Dmand AI links 30 papers to Dr. Marhefka, published from 2012 to 2025. 2022 was the busiest year, with 4. The most frequent topics are Electrocardiography, Echocardiography and Cardiac Tamponade. Dr. Marhefka has published most often in Tex Heart Inst J. Dr. Marhefka's most frequent co-authors are Matthew Decaro, MD, Vakhtang Tchantchaleishvili, MD and Nicholas C. Cavarocchi, MD.
Dr. Marhefka's papers by year, 2014 to 2025
Topics Dr. Marhefka writes about most
- Electrocardiography
- Echocardiography
- Cardiac Tamponade
- Acute Coronary Syndrome
- Coronary Artery Bypass
- Coronary Artery Disease
- Diagnosis, Differential
- Heart Failure
Dr. Marhefka's most frequent co-authors
- Matthew Decaro, MD3 shared papers
- Vakhtang Tchantchaleishvili, MD3 shared papers
- Nicholas C. Cavarocchi, MD2 shared papers
Recent publications by Dr. Marhefka
J Electrocardiol
See who Dr. Marhefka researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Marhefka works with, so you can find a warm path to the right cardiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Gregary D. Marhefka has worked on 1 clinical trial
Dmand AI links Dr. Marhefka to 1 clinical trial. Conditions studied include Myocardial Infarction and Infarction.
Conditions in Dr. Marhefka's trials
- Myocardial Infarction
- Infarction
Investigators on the most trials with Dr. Marhefka
- Jinnette Dawn Abbott, MD1 shared trial
- Farhad Abtahian1 shared trial
- Richard G. Bach, MD1 shared trial
Recent clinical trials with Dr. Marhefka
Myocardial Ischemia and Transfusion (opens in a new tab)
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Gregary D. Marhefka received $624 in industry payments from 2016 to 2025
CMS Open Payments shows 14 general payments to Dr. Marhefka from 9 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Abiomed paid the most, $134.
General payments to Dr. Marhefka by program year, 2016 to 2025
Companies that paid Dr. Marhefka the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregary D. Marhefka graduated from Sidney Kimmel Medical College at Thomas Jefferson University
Dr. Marhefka graduated from Sidney Kimmel Medical College at Thomas Jefferson University in 1998.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregary D. Marhefka'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)Doctors and Clinicians Utilization Data (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 |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab) |
| 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. Gregary D. Marhefka
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. Gregary D. Marhefka's NPI number?
Dr. Gregary D. Marhefka's NPI number is 1649226184. It was assigned on May 26, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregary D. Marhefka?
Dr. Gregary D. Marhefka is a cardiologist in Philadelphia, Pennsylvania. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Gregary D. Marhefka practice?
Dr. Marhefka practices at 111 South 11th Street, Philadelphia, PA 19107. Dr. Marhefka's primary practice is Thomas Jefferson University Hospital in Philadelphia, Pennsylvania, part of Thomas Jefferson University. Dmand AI also links Dr. Marhefka to 2 hospitals, 1 group practice or clinic and 1 medical group.
What is Dr. Gregary D. Marhefka's office phone number?
The practice phone on file for Dr. Marhefka is (215) 955-6000.
What is Dr. Gregary D. Marhefka's medical license number?
Dr. Marhefka holds Pennsylvania license MD423362, one of the licenses on file in 2 states.
Which states has Dr. Gregary D. Marhefka been licensed in?
Dmand AI has state licenses on file for Dr. Marhefka in Pennsylvania and New Jersey.
Which hospitals is Dr. Gregary D. Marhefka affiliated with?
Dr. Marhefka practices at Thomas Jefferson University Hospital in Philadelphia, Pennsylvania. Dr. Marhefka is also affiliated with Beebe Healthcare. Dmand AI links Dr. Marhefka to 2 more hospitals.
What medical group is Dr. Gregary D. Marhefka part of?
Dr. Marhefka is linked to Jefferson University Physicians. Dmand AI links Dr. Marhefka to 1 more medical group.
Does Dr. Gregary D. Marhefka accept Medicare?
Yes. CMS data shows Dr. Marhefka billed Medicare for 1,725 services in 2024, and Dr. Marhefka accepts Medicare assignment.
Does Dr. Gregary D. Marhefka offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Marhefka as offering telehealth services.
Show 8 more questionsShow fewer questions
How many Medicare patients does Dr. Gregary D. Marhefka see?
CMS counts 563 Medicare patients who saw Dr. Marhefka in 2024, with an average age of 74.
What services does Dr. Gregary D. Marhefka bill to Medicare?
In 2024, Dr. Marhefka's most billed Medicare services were heart test or procedure (93010), critical care (99291) and office visit, established patient (99214).
Where did Dr. Gregary D. Marhefka go to medical school?
Dr. Marhefka graduated from Sidney Kimmel Medical College at Thomas Jefferson University in 1998.
What drugs does Dr. Gregary D. Marhefka prescribe most?
In 2024 Medicare Part D data, Dr. Marhefka's most prescribed drugs by claims were Metoprolol Succinate, Atorvastatin Calcium and Rosuvastatin Calcium.
Has Dr. Gregary D. Marhefka received payments from drug or device companies?
CMS Open Payments shows $624 in general payments to Dr. Marhefka from 9 companies from 2016 to 2025. The largest total came from Abiomed.
How long has Dr. Gregary D. Marhefka been practicing?
Dr. Marhefka graduated from medical school in 1998, 28 years ago.
Does Dr. Gregary D. Marhefka do research?
Dmand AI links 30 publications to Dr. Marhefka, published from 2012 to 2025. Dr. Marhefka has worked on 1 clinical trial.
Who does Dr. Gregary D. Marhefka publish with?
Dr. Marhefka's most frequent co-authors are Matthew Decaro, MD (3 shared papers), Vakhtang Tchantchaleishvili, MD (3 shared papers) and Nicholas C. Cavarocchi, MD (2 shared papers).
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