FIONA WILLIAMS FNP-BC
NPI 1083352314
Nurse Practitioner - Family in Douglaston, NY
About Fiona Williams Fnp-bc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
FIONA WILLIAMS FNP-BC (NPI 1083352314) is an individual family provider in Douglaston, New York, licensed in New York (349373) and active in the NPI registry since May 2022. She is enrolled in Medicare PECOS, is affiliated with North Shore University Hospital, and is a graduate of Other (2021).
NPPES Registry Identity
Specialties & Licenses 2
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
Fiona Williams Fnp-bc 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
4Medicare enrollment records show Fiona Williams reassigns Medicare billing to 4 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
- 3 clinicians in this Medicare group
New Hyde Park, NY 11040
- Reassigned Medicare billing, New York enrollment
- 9,353 clinicians in this Medicare group
Huntington, NY 11743
- Reassigned Medicare billing, New York enrollment
- 5 clinicians in this Medicare group
Hauppauge, NY 11788
- Reassigned Medicare billing, New York enrollment
- 6 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 6
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
North Shore University Hospital
Acute Care Hospitals · Manhasset, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11362 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 4
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 Fiona Williams's NPI number?
The NPI number for Fiona Williams is 1083352314. It was assigned to this individual provider in the NPPES registry on May 25, 2022.
Where is Fiona Williams located?
Fiona Williams practices at 24102 Northern Blvd, Douglaston, NY 11362. The listed phone number is (718) 461-0163.
What is Fiona Williams's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Fiona Williams enrolled in Medicare?
Yes. Fiona Williams 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 Fiona Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Fiona Williams reassigns Medicare benefits to 4 organizations: Endocrine Consultants Of Long Island LLP (Great Neck, NY), North Shore - Lij Medical PC (New Hyde Park, NY), Nsuh Huntington Physicians Ufp Corporation (Huntington, NY) and Huntington Faculty Medical Affiliates University Faculty Prac (Hauppauge, 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 Fiona Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Fiona Williams affiliated with any hospitals?
According to CMS data, Fiona Williams is affiliated with North Shore University Hospital.
When was this NPI record last updated?
The NPPES record for Fiona Williams was last updated on April 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Fiona Williams, FNP-BC · NPI 1083352314
Family physician in Douglaston, New York. Individual provider, active in the CMS NPPES registry since May 25, 2022.
## Identity
- **NPI:** 1083352314 (Entity type: Individual)
- **Enumerated:** May 25, 2022
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 349373 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 24102 NORTHERN BLVD, Douglaston, NY 11362-1055
- **Phone:** (718) 461-0163
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Endocrine Consultants Of Long Island LLP (NPI 1598061046, Great Neck, NY); North Shore - Lij Medical PC (NPI 1790043479, New Hyde Park, NY); Nsuh Huntington Physicians Ufp Corporation (NPI 1164223657, Huntington, NY); Huntington Faculty Medical Affiliates University Faculty Prac (NPI 1841132511, Hauppauge, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2021
## Record status
- **NPPES last updated:** April 14, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1083352314) · Data from the CMS NPPES public registry.