DR. JOHN FRANCIS MICHAEL HENNECKEN MD
NPI 1104856780
Internal Medicine - Cardiovascular Disease in Brooklyn, NY
About Dr. John Francis Michael Hennecken Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN FRANCIS MICHAEL HENNECKEN MD (NPI 1104856780) is an individual cardiovascular disease provider in Brooklyn, New York, licensed in New York (15076501) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of State University Of New York Downstate Medical Center (1981).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Other Identifiers 1
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 Francis Michael Hennecken Md 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 Francis Hennecken reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Brooklyn, NY 11201
- Reassigned Medicare billing, New York enrollment
- 101 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 7
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11201 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 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Francis Hennecken's NPI number?
The NPI number for John Francis Hennecken is 1104856780. It was assigned to this individual provider in the NPPES registry on July 3, 2006.
Where is John Francis Hennecken located?
John Francis Hennecken practices at 300 Cadman Plz W Fl 18, Brooklyn, NY 11201. The listed phone number is (929) 210-6135.
What is John Francis Hennecken's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.
Is John Francis Hennecken enrolled in Medicare?
Yes. John Francis Hennecken 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 Francis Hennecken's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Francis Hennecken reassigns Medicare benefits to Icahn School Of Medicine At Mount Sinai (Brooklyn, NY). 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 Francis Hennecken's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for John Francis Hennecken was last updated on May 18, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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 Francis Michael Hennecken, MD · NPI 1104856780
Cardiovascular Disease physician in Brooklyn, New York. Individual provider, active in the CMS NPPES registry since July 3, 2006.
## Identity
- **NPI:** 1104856780 (Entity type: Individual)
- **Enumerated:** July 3, 2006
- **Primary specialty:** Internal Medicine - Cardiovascular Disease · taxonomy 207RC0000X
- **State license:** 15076501 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 CADMAN PLZ W FL 18, Brooklyn, NY 11201-3226
- **Phone:** (929) 210-6135
## 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:** Icahn School Of Medicine At Mount Sinai (NPI 1255719563, Brooklyn, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** State University Of New York Downstate Medical Center, class of 1981
## Record status
- **NPPES last updated:** May 18, 2020
- **Other identifiers:** Medicaid 000508934I, J (GA)
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Source: [NPI Profile](https://npiprofile.com/npi/1104856780) · Data from the CMS NPPES public registry.