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

Dr. John Michael Clark, DO

Individual provider Internal Medicine Physician · NPI 1831484138

Dr. John Michael Clark, DO is registered under Cardiovascular Disease (Cardiology) in Wynnewood, Pennsylvania. Graduated from Philadelphia College of Osteopathic Medicine in 2011, 15 years ago. Practices with Main Line Healthcare, a 1,153-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Pennsylvania.

Years since qualifying
15
Trained at
Philadelphia College of Osteopathic Medicine
Licensed in
PA
In the registry since
2011
Specialties on file
3
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

100 E Lancaster Ave Heart Pavilion Mezzanine Level
Wynnewood, PA 19096-3435
Phone: (484) 476-1000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Advanced Heart Failure and Transplant Cardiology Physician (primary) Taxonomy 207RA0001X · Licence OS019297 (PA)
Internal Medicine Physician Taxonomy 207R00000X · Licence OS019297 (PA)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence OS019297 (PA)

Record details

NPI number1831484138
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJune 14, 2011
Last updated in NPPESOctober 17, 2024
Certification dateOctober 17, 2024

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesADVANCED HEART FAILURE AND TRANSPLANT CARDIOLOGY
Medical schoolPHILADELPHIA COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2011 (15 years in practice)
Group practice Main Line Healthcare — 1153 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations8 on file with Medicare

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 patients439
Services billed 1,811 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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 $37 2 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.

Colleagues at Main Line Healthcare

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1153 clinicians in the practice; 12 are shown here.

Other providers in Wynnewood