NPPES file of Aug 9, 2026

Naomi Ysimura

Family Nurse Practitioner · East Setauket, NY

Naomi Ysimura is a family nurse practitioner with a practice address in East Setauket, New York, and NPI 1255138624, issued on Feb 25, 2025. Check the license (New York 353764, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1255138624
Name
Naomi Ysimura
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License number
353764 NY
Self-reported in NPPES; status is on the state search
Practice location
45 Research Way Ste 108, East Setauket, NY 11733
Phone
(631) 941-2000
Enumerated
Feb 25, 2025
Record last updated
Feb 25, 2025
Medicare enrollment
Enrolled (PECOS I20250623000806); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest family nurse practitioner records → All 14,805 in New York → Look up another NPI →

Also registered at 45 Research Way Ste 108

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Enas Abuhadba, FNP-BCFamily Nurse Practitioner1891511531
  2. Spencer Alvarado, PAPhysician Assistant1427833631
  3. Kathleen Callaghan, NP, RNAdult Health Nurse Practitioner1053097691
  4. Katelyn Doherty, NPNurse Practitioner1851991194
  5. Liliana Garcia, NPFamily Nurse Practitioner1841037058
  6. Kristen Hass, PA-CPhysician Assistant1538972054

Verify Naomi Ysimura in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich New York board licenses this profession
    Search for license 353764    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the New York license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Chs Physician Partners PCBay Shore, NY

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Naomi Ysimura among 14,805 family nurse practitioner records in New York

Naomi Ysimura is one of 14,805 family nurse practitioner records with a practice address in New York. 68% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2025, is newer than 90% of them.

  • NPI issued2025 · 90% of these records are older, 4% newer
  • In a Medicare fileYes · 68% of these records are
  • In the CMS Doctors and Clinicians fileYes · 49% of these records are
  • Graduated2024 · median 2019 among the 7,239 with a school on file
  • Record last updated2025 · 45% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

25 family nurse practitioner records list a practice address in East Setauket

They are 25 of the 972 NPPES records with a practice address in East Setauket, and 14,805 family nurse practitioner records in New York.

All 14,805 in New York → Every provider in East Setauket → Family Nurse Practitioner nationwide →

The 8 family nurse practitioner records with the nearest ZIP codes

  1. Kristen Alarcon, F.N,P.East Setauket, NY 117331033365028
  2. Beverly Dean, NPEast Setauket, NY 117331124039060
  3. Melissa Feraca, FNP,BCEast Setauket, NY 117331982263091
  4. Lorraine Freire, FNPEast Setauket, NY 117331609972652
  5. Erin Henkes, CRNPEast Setauket, NY 117331447685847
  6. Catheryne LeonEast Setauket, NY 117331164806535
  7. Robert Long, FNPEast Setauket, NY 117331790013498
  8. Constance Madu, NPEast Setauket, NY 117331982932158

Common questions

What is Naomi Ysimura's NPI number?

Naomi Ysimura's National Provider Identifier (NPI) is 1255138624, issued on Feb 25, 2025. An NPI identifies a provider in billing; it is not a license.

Where is Naomi Ysimura located?

The NPPES record lists a practice address at 45 Research Way Ste 108, East Setauket, NY, 11733. Phone: (631) 941-2000. Providers update this record themselves, so call before visiting.

How can I verify Naomi Ysimura's license?

NPPES lists New York license number 353764, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.