MARK HELLERMAN MD
NPI 1033614045
Internal Medicine - Cardiovascular Disease in Stony Brook, NY
About Mark Hellerman Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK HELLERMAN MD (NPI 1033614045) is an individual cardiovascular disease provider in Stony Brook, New York, licensed in New York (314341) and active in the NPI registry since March 2018. He is enrolled in Medicare PECOS, is affiliated with New York-presbyterian Hospital, and maintains a secondary practice location in New York.
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Location 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
Mark Hellerman 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 Reassignments
2Medicare enrollment records show Mark Hellerman reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Great Neck, NY 11021
- Reassigned Medicare billing, New York enrollment
- 9,353 clinicians in this Medicare group
New York, NY 10032
- Reassigned Medicare billing, New York enrollment
- 3,922 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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
New York-Presbyterian Hospital
Acute Care Hospitals · New York, NYSuny/Stony Brook University Hospital
Acute Care Hospitals · Stony Brook, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11794 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.
STONY BROOK, NY 11794
STONY BROOK, NY 11794
STONY BROOK, NY 11794
STONY BROOK, NY 11794
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 Mark Hellerman's NPI number?
The NPI number for Mark Hellerman is 1033614045. It was assigned to this individual provider in the NPPES registry on March 30, 2018.
Where is Mark Hellerman located?
Mark Hellerman practices at 101 Nicolls Rd, Stony Brook, NY 11794. The listed phone number is (631) 444-3278.
What is Mark Hellerman's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.
Is Mark Hellerman enrolled in Medicare?
Yes. Mark Hellerman 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 organizations bill Medicare for Mark Hellerman's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Hellerman reassigns Medicare benefits to 2 organizations: North Shore-Lij Medical PC (Great Neck, NY) and Trustees Of Columbia University In The City Of New York (New York, NY). Each 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 Mark Hellerman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Mark Hellerman affiliated with any hospitals?
According to CMS data, Mark Hellerman is affiliated with New York-Presbyterian Hospital and Suny/Stony Brook University Hospital.
When was this NPI record last updated?
The NPPES record for Mark Hellerman was last updated on May 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months 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.
# Mark Hellerman, MD · NPI 1033614045
Cardiovascular Disease physician in Stony Brook, New York. Individual provider, active in the CMS NPPES registry since March 30, 2018.
## Identity
- **NPI:** 1033614045 (Entity type: Individual)
- **Enumerated:** March 30, 2018
- **Primary specialty:** Internal Medicine - Cardiovascular Disease · taxonomy 207RC0000X
- **State license:** 314341 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 101 NICOLLS RD, Stony Brook, NY 11794-3816
- **Phone:** (631) 444-3278
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): North Shore-Lij Medical PC (NPI 1053688572, Great Neck, NY); Trustees Of Columbia University In The City Of New York (NPI 1508266347, New York, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Albert Einstein College Of Medicine Of Yeshiva University, class of 2018
## Record status
- **NPPES last updated:** May 19, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1033614045) · Data from the CMS NPPES public registry.