DR. JOHN MICHAEL CLARK D.O.
NPI 1831484138
Internal Medicine - Advanced Heart Failure and Transplant Cardiology in Wynnewood, PA
About Dr. John Michael Clark D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN MICHAEL CLARK D.O. (NPI 1831484138) is an individual advanced heart failure and transplant cardiology provider in Wynnewood, Pennsylvania, licensed in Pennsylvania (OS019297) and active in the NPI registry since June 2011. He is enrolled in Medicare PECOS, is affiliated with Bryn Mawr Hospital, and is a graduate of Philadelphia College Of Osteopathic Medicine (2011).
NPPES Registry Identity
Specialties & Licenses 3
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. John Michael Clark D.o. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show John Clark reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Newtown Square, PA 19073
- Reassigned Medicare billing, Pennsylvania enrollment
- 1,638 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 13
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Bryn Mawr Hospital
Acute Care Hospitals · Bryn Mawr, PAPaoli Hospital
Acute Care Hospitals · Paoli, PAMain Line Hospital Lankenau
Acute Care Hospitals · Wynnewood, PARiddle Memorial Hospital
Acute Care Hospitals · Media, PAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 19096 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WYNNEWOOD, PA 19096
WYNNEWOOD, PA 19096
WYNNEWOOD, PA 19096
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Clark's NPI number?
The NPI number for John Clark is 1831484138. It was assigned to this individual provider in the NPPES registry on June 14, 2011.
Where is John Clark located?
John Clark practices at 100 E Lancaster Ave Heart Pavilion Mezzanine Level, Wynnewood, PA 19096. The listed phone number is (484) 476-1000.
What is John Clark's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Advanced Heart Failure and Transplant Cardiology, with taxonomy code 207RA0001X.
Is John Clark enrolled in Medicare?
Yes. John Clark is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for John Clark's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Clark reassigns Medicare benefits to Main Line Healthcare (Newtown Square, PA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Clark's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is John Clark affiliated with any hospitals?
According to CMS data, John Clark is affiliated with Bryn Mawr Hospital, Paoli Hospital, Main Line Hospital Lankenau and Riddle Memorial Hospital.
When was this NPI record last updated?
The NPPES record for John Clark was last updated on October 17, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. John Michael Clark, D.O. · NPI 1831484138
Advanced Heart Failure and Transplant Cardiology physician in Wynnewood, Pennsylvania. Individual provider, active in the CMS NPPES registry since June 14, 2011.
## Identity
- **NPI:** 1831484138 (Entity type: Individual)
- **Enumerated:** June 14, 2011
- **Primary specialty:** Internal Medicine - Advanced Heart Failure and Transplant Cardiology · taxonomy 207RA0001X
- **State license:** OS019297 (Pennsylvania)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 E LANCASTER AVE, HEART PAVILION MEZZANINE LEVEL, Wynnewood, PA 19096-3435
- **Phone:** (484) 476-1000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Main Line Healthcare (NPI 1922077643, Newtown Square, PA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Philadelphia College Of Osteopathic Medicine, class of 2011
## Record status
- **NPPES last updated:** October 17, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1831484138) · Data from the CMS NPPES public registry.