MISS STACY-ANN GRENAN NP
NPI 1679018444
Nurse Practitioner - Gerontology in Roslyn, NY
About Miss Stacy-ann Grenan Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MISS STACY-ANN GRENAN NP (NPI 1679018444) is an individual gerontology provider in Roslyn, New York, licensed in New York (307898) and active in the NPI registry since January 2017. She is enrolled in Medicare PECOS, is affiliated with St Francis Hospital - The Heart Center, and is a graduate of State University Of New York At Stony Brook, School Of Medicine (2016).
NPPES Registry Identity
Specialties & Licenses
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
Miss Stacy-ann Grenan Np 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 Stacy-ann Grenan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Roslyn, NY 11576
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Chs Physician Partners PC
- 944 clinicians in this Medicare group
West Islip, NY 11795
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Samaritan Medical Services PC
- 209 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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
St Francis Hospital - The Heart Center
Acute Care Hospitals · Roslyn, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11576 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.
ROSLYN, NY 11576
ROSLYN, NY 11576
ROSLYN, NY 11576
ROSLYN, NY 11576
ROSLYN, NY 11576
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 Stacy-ann Grenan's NPI number?
The NPI number for Stacy-ann Grenan is 1679018444. It was assigned to this individual provider in the NPPES registry on January 3, 2017.
Where is Stacy-ann Grenan located?
Stacy-ann Grenan practices at 100 Port Washington Blvd, Roslyn, NY 11576. The listed phone number is (516) 562-6000.
What is Stacy-ann Grenan's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Gerontology, with taxonomy code 363LG0600X.
Is Stacy-ann Grenan enrolled in Medicare?
Yes. Stacy-ann Grenan 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 Stacy-ann Grenan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stacy-ann Grenan reassigns Medicare benefits to 2 organizations: Chs Physician Partners, P.C (Roslyn, NY) and Samaritan Medical Services, P.C. (West Islip, 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 Stacy-ann Grenan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Stacy-ann Grenan affiliated with any hospitals?
According to CMS data, Stacy-ann Grenan is affiliated with St Francis Hospital - The Heart Center.
When was this NPI record last updated?
The NPPES record for Stacy-ann Grenan was last updated on January 3, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Miss Stacy-Ann Grenan, NP · NPI 1679018444
Gerontology physician in Roslyn, New York. Individual provider, active in the CMS NPPES registry since January 3, 2017.
## Identity
- **NPI:** 1679018444 (Entity type: Individual)
- **Enumerated:** January 3, 2017
- **Primary specialty:** Nurse Practitioner - Gerontology · taxonomy 363LG0600X
- **State license:** 307898 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 100 PORT WASHINGTON BLVD, Roslyn, NY 11576-1347
- **Phone:** (516) 562-6000
## 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): Chs Physician Partners, P.C (NPI 1164585725, Roslyn, NY); Samaritan Medical Services, P.C. (NPI 1124184544, West Islip, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** State University Of New York At Stony Brook, School Of Medicine, class of 2016
## Record status
- **NPPES last updated:** January 3, 2017
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Source: [NPI Profile](https://npiprofile.com/npi/1679018444) · Data from the CMS NPPES public registry.