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

John Michael Allen, DO

Individual provider Family Medicine Physician · NPI 1215514815

John Michael Allen, DO practises Internal Medicine in Mentor, Ohio. Graduated from Ohio University, College of Osteopathic Medicine in 2021, 5 years ago. Practices with Lake Hospital System, Inc, a 94-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Ohio.

Years since qualifying
5
Trained at
Ohio University, College of Osteopathic Medicine
Licensed in
OH
In the registry since
2021
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

9500 Mentor Ave Ste 100
Mentor, OH 44060-8702
Phone: (440) 898-1021
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 27100 Chardon Rd, Richmond Heights, OH 44143-1116 — (440) 585-6500

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 34.017207 (OH)

Record details

NPI number1215514815
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMarch 28, 2021
Last updated in NPPESJuly 10, 2024
Certification dateJuly 10, 2024

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOHIO UNIVERSITY, COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2021 (5 years in practice)
Group practice Lake Hospital System, Inc. — 94 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients86
Services billed 124 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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 $548 35 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.

Colleagues at Lake Hospital System, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 94 clinicians in the practice; 12 are shown here.

Other providers in Mentor