Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Marcus Messmer

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1285070490

Marcus Messmer practises Hematology/Oncology in Philadelphia, Pennsylvania. Graduated from Johns Hopkins University School of Medicine in 2014, 12 years ago. Practices with Temple Faculty Practice Plan Inc, a 1,314-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Pennsylvania.

Years since qualifying
12
Trained at
Johns Hopkins University School of Medicine
Licensed in
PA
In the registry since
2013
Specialties on file
2
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Practice location Address checks out

Student / training record This NPI belongs to someone enrolled in a health care training programme. It carries no licence and no practice of its own, so no address or phone number is published for it.

Philadelphia, PA

No coordinates on file. Search this address in Google Maps

Specialties & licences

Medical Oncology Physician (primary) Taxonomy 207RX0202X · Licence MD474051 (PA)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1285070490
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedMay 14, 2013
Last updated in NPPESJuly 7, 2021
Certification dateJuly 7, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHEMATOLOGY/ONCOLOGY
Medical schoolJOHNS HOPKINS UNIVERSITY SCHOOL OF MEDICINE
Graduated 2014 (12 years in practice)
Group practice Temple Faculty Practice Plan Inc — 1314 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients148
Services billed 355 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Compensation for services other than consulting , including serving as faculty or as a speaker at a venue other than a continuing education program $10,725 6 payments
Consulting Fee $6,170 5 payments
Food and Beverage $1,055 24 payments · a meal or drink at a meeting or visit, not a fee
Travel and Lodging $950 6 payments · travel or lodging paid or reimbursed, such as to attend a conference

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Also affiliated with 1 hospital, which CMS identifies by certification number only.

Colleagues at Temple Faculty Practice Plan Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1314 clinicians in the practice; 12 are shown here.

Other providers in Philadelphia