DR. STEFANOS GIANNOPOULOS MD
NPI 1538717129
Student in an Organized Health Care Education/Training Program in Stony Brook, NY
About Dr. Stefanos Giannopoulos Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. STEFANOS GIANNOPOULOS MD (NPI 1538717129) is an individual student in an organized health care education/training program in Stony Brook, New York and active in the NPI registry since August 2019. He is enrolled in Medicare PECOS, maintains a secondary practice location in Aurora, and is a graduate of Other (2017).
NPPES Registry Identity
Specialties & Licenses 2
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
Dr. Stefanos Giannopoulos 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 Stefanos Giannopoulos reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Stony Brook, NY 11794
- Reassigned Medicare billing, New York enrollment
- 114 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.
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 Stefanos Giannopoulos's NPI number?
The NPI number for Stefanos Giannopoulos is 1538717129. It was assigned to this individual provider in the NPPES registry on August 28, 2019.
Where is Stefanos Giannopoulos located?
Stefanos Giannopoulos practices at 101 Nicolls Rd, Stony Brook, NY 11794. The listed phone number is (631) 638-2698.
What is Stefanos Giannopoulos's specialty?
The primary specialty registered for this NPI is Student in an Organized Health Care Education/Training Program with taxonomy code 390200000X.
Is Stefanos Giannopoulos enrolled in Medicare?
Yes. Stefanos Giannopoulos 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 Stefanos Giannopoulos's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stefanos Giannopoulos reassigns Medicare benefits to Stony Brook Surgical Associates, University Faculty Practice Corporati (Stony Brook, 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 Stefanos Giannopoulos'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 Stefanos Giannopoulos was last updated on March 22, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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. Stefanos Giannopoulos, MD · NPI 1538717129
Student in an Organized Health Care Education/Training Program provider in Stony Brook, New York. Individual provider, active in the CMS NPPES registry since August 28, 2019.
## Identity
- **NPI:** 1538717129 (Entity type: Individual)
- **Enumerated:** August 28, 2019
- **Primary specialty:** Student in an Organized Health Care Education/Training Program · taxonomy 390200000X
- **Sole proprietor:** Yes
## Practice location
- **Address:** 101 NICOLLS RD, Stony Brook, NY 11794-8434
- **Phone:** (631) 638-2698
## 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:** Stony Brook Surgical Associates, University Faculty Practice Corporati (NPI 1063468536, Stony Brook, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** March 22, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1538717129) · Data from the CMS NPPES public registry.