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

Mark John Frilling, MD

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1326535139

Mark John Frilling, MD practises Otolaryngology in Dayton, Ohio. Graduated from University of Toledo College of Medicine in 2018, 8 years ago. Practices with Southwest Ohio ENT Specialists Inc, a 41-clinician group and accepts Medicare assignment. Licensed in Ohio.

Years since qualifying
8
Trained at
University of Toledo College of Medicine
Licensed in
OH
In the registry since
2018
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

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.

Dayton, OH

No coordinates on file. Search this address in Google Maps

Specialties & licences

Otolaryngology Physician (primary) Taxonomy 207Y00000X · Licence 35.147238 (OH)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1326535139
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 17, 2018
Last updated in NPPESJune 12, 2023
Certification dateJune 12, 2023

Medicare enrollment

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

Medicare specialtyOTOLARYNGOLOGY
Medical schoolUNIVERSITY OF TOLEDO COLLEGE OF MEDICINE
Graduated 2018 (8 years in practice)
Group practice Southwest Ohio Ent Specialists Inc — 41 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Skin biopsy 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients388
Services billed 1,806 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.

Food and Beverage $323 8 payments · a meal or drink at a meeting or visit, not a fee

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.

  • Kettering Health Main Campus Hospital · Kettering, OH · listed as Kettering Medical Center
  • Upper Valley Medical Center Hospital · Troy, OH
  • Grand Lake Health System Hospital · Saint Marys, OH
  • Kettering Health Dayton Hospital · Dayton, OH
  • Kettering Health Troy Hospital · Troy, OH

Colleagues at Southwest Ohio ENT Specialists Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 41 clinicians in the practice; 12 are shown here.

Other providers in Dayton