NPPES file of Aug 9, 2026

Mary Ann Defalco, NP

Nurse Practitioner · West Islip, NY

Mary Ann Defalco, NP is a nurse practitioner with a practice address in West Islip, New York, and NPI 1144208570, issued on Jan 5, 2006. Check the license (New York F3042641, 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 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1144208570
Name
Mary Ann Defalco
Credential
NP
Primary taxonomy
Nurse Practitioner 363L00000X
License number
F3042641 NY
Self-reported in NPPES; status is on the state search
Practice location
540 Union Blvd, West Islip, NY 11795
Phone
(631) 669-2555
Enumerated
Jan 5, 2006
Record last updated
Jul 13, 2026
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest nurse practitioner records → All 3,097 in New York → Look up another NPI →

Also registered at 540 Union Blvd

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

  1. Michael Aaron, MDCardiovascular Disease Physician1790762623
  2. Eileen Alessandro, NPFamily Nurse Practitioner1649601758
  3. Larry Altschul, MDCardiovascular Disease Physician1093794901
  4. John Asheld, DONuclear Cardiology Physician1699935973
  5. Wilbur Asheld, DONuclear Cardiology Physician1710247549
  6. Uschi Auguste, MDCardiovascular Disease Physician1679872824

Verify Mary Ann Defalco 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 F3042641    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

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Industry payments in 2024: $129.58

5 payments; by number, the most common kind was food and beverage; the largest payer was Boston Scientific Corporation. The 38,884 providers of this specialty with any payment received $791.64 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Mary Ann Defalco$129.58
  2. Specialty average$791.64

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Mary Ann Defalco among 3,097 nurse practitioner records in New York

Mary Ann Defalco, NP is one of 3,097 nurse practitioner records with a practice address in New York. 64% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.

  • NPI issued2006 · 5% of these records are older, 70% newer
  • In a Medicare fileYes · 64% of these records are
  • In the CMS Doctors and Clinicians fileNo · 44% of these records are
  • Record last updated2026 · 58% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Nurse Practitioner providers in New York

There are 3,097 nurse practitioner records in New York.

All 3,097 in New York → Every provider in West Islip → Nurse Practitioner nationwide →

The 8 nurse practitioner records with the nearest ZIP codes

  1. Sherri Lee, NPWest Islip, NY 117951508843434
  2. Alyssa Marklin, NPWest Islip, NY 117951700511961
  3. Alicia Noto, NPWest Islip, NY 117951265605505
  4. Eileen Swailes, NPWest Islip, NY 117951740506807
  5. Patricia Toolan, NPWest Islip, NY 117951326025255
  6. Serena Borrero Lovelace, NP, RNStony Brook, NY 117941679163729
  7. Wai Ying ChanStony Brook, NY 117941144066648
  8. Bernadette Chaplin-Swope, AGNP-CStony Brook, NY 117941629225206

Common questions

What is Mary Ann Defalco, NP's NPI number?

Mary Ann Defalco, NP's National Provider Identifier (NPI) is 1144208570, issued on Jan 5, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Mary Ann Defalco, NP located?

The NPPES record lists a practice address at 540 Union Blvd, West Islip, NY, 11795. Phone: (631) 669-2555. Providers update this record themselves, so call before visiting.

How can I verify Mary Ann Defalco, NP's license?

NPPES lists New York license number F3042641, 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.