Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. John-Paul Grenier, MD

Individual provider Diagnostic Radiology Physician · NPI 1366977092

Dr. John-Paul Grenier, MD practises Diagnostic Radiology in New York, New York. Graduated from Louisiana State University School of Medicine in New Orleans in 2017, 9 years ago. Practices with Fpa Hospital Based, a 422-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Louisiana.

Years since qualifying
9
Trained at
Louisiana State University School of Medicine in New Orleans
Licensed in
LA
In the registry since
2017
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

1468 Madison Ave
New York, NY 10029-6508
Phone: (212) 241-6500
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 800 Old Metairie Dr, Metairie, LA 70001-6095 — (225) 610-6520

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence 2085R0202X (LA)

Record details

NPI number1366977092
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 1, 2017
Last updated in NPPESSeptember 26, 2024
Certification dateSeptember 26, 2024

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolLOUISIANA STATE UNIVERSITY SCHOOL OF MEDICINE IN NEW ORLEANS
Graduated 2017 (9 years in practice)
Group practice Fpa Hospital Based — 422 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 patients1,262
Services billed 2,606 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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Fpa Hospital Based

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 422 clinicians in the practice; 12 are shown here.

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