Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mark Knapp, MD

Individual provider Medical Oncology Physician · NPI 1952359549

Mark Knapp, MD practises Hematology/Oncology in Columbus, Ohio. Graduated from University of Cincinnati College of Medicine in 1997, 29 years ago. Practices with American Oncology Partners PA, a 383-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Ohio.

Years since qualifying
29
Trained at
University of Cincinnati College of Medicine
Licensed in
OH
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3100 Plaza Properties Blvd
Columbus, OH 43219-1530
Phone: (614) 383-6000
Fax: (614) 383-6001
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 35078040 (OH)
Medical Oncology Physician Taxonomy 207RX0202X · Licence 35078040 (OH)

Record details

NPI number1952359549
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 5, 2006
Last updated in NPPESJanuary 11, 2023
Certification dateJanuary 11, 2023

Medicare enrollment

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

Medicare specialtyHEMATOLOGY/ONCOLOGY
Also practisesMEDICAL ONCOLOGY
Medical schoolUNIVERSITY OF CINCINNATI COLLEGE OF MEDICINE
Graduated 1997 (29 years in practice)
Group practice American Oncology Partners Pa — 383 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 patients412
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.

Consulting Fee $5,370 2 payments
Food and Beverage $1,030 32 payments · a meal or drink at a meeting or visit, not a fee
Compensation for services other than consulting , including serving as faculty or as a speaker at a venue other than a continuing education program $1,000 1 payment
Travel and Lodging $970 4 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.

  • Mount Carmel St Ann'S Hospital · Westerville, OH · listed as Mount Carmel
  • Mount Carmel East & West Hospital · Columbus, OH

Colleagues at American Oncology Partners PA

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 383 clinicians in the practice; 12 are shown here.

Other providers in Columbus