Thomas J. Harrison, FNP-C
Family Nurse Practitioner · West Islip, NY
Thomas J. Harrison, FNP-C is a family nurse practitioner with a practice address in West Islip, New York, and NPI 1083642938, issued on Jun 29, 2006. Check the license (New York F334847, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Thomas J. Harrison
- Credential
- FNP-C
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- F334847 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
- Jun 29, 2006
- Record last updated
- Dec 11, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (631) 669-5787
- Medicare enrollment
- Enrolled (PECOS I20070402000460); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Stony Brook, School Of Medicine, 2005
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 14,805 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.
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- Wilbur Asheld, DONuclear Cardiology Physician1710247549
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Verify Thomas J. Harrison in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New York board licenses this profession
Search for license F334847Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average family nurse practitioner in 2024
172 Medicare Part D claims for 82 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Clopidogrel57 claims
- Atorvastatin Calcium17 claims
- Metoprolol Succinate13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $249.92
12 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 99,489 providers of this specialty with any payment received $650.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- North Shore-Lij Medical PCBay Shore, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas J. Harrison among 14,805 family nurse practitioner records in New York
Thomas J. Harrison, FNP-C 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 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 91% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 49% of these records are
- Graduated2005 · median 2019 among the 7,239 with a school on file
- Record last updated2014 · 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).
44 family nurse practitioner records list a practice address in West Islip
They are 44 of the 1,107 NPPES records with a practice address in West Islip, and 14,805 family nurse practitioner records in New York.
All 14,805 in New York → Every provider in West Islip → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Eileen Alessandro, NPWest Islip, NY 117951649601758
- Suzanne Angelillo, FNPWest Islip, NY 117951760777668
- Tracey Bennardo, NPWest Islip, NY 117951194063594
- Nicole Boeckel, FNPWest Islip, NY 117951144493768
- Laura Candelaria, FNPWest Islip, NY 117951851670590
- Karyn Carpenter, FNP-CWest Islip, NY 117951922363910
- Camille CollettiWest Islip, NY 117951871847210
- Meghan Derocchis, NPWest Islip, NY 117951720305519
Common questions
What is Thomas J. Harrison, FNP-C's NPI number?
Thomas J. Harrison, FNP-C's National Provider Identifier (NPI) is 1083642938, issued on Jun 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas J. Harrison, FNP-C 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 Thomas J. Harrison, FNP-C's license?
NPPES lists New York license number F334847, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
How much does Thomas J. Harrison, FNP-C prescribe under Medicare Part D?
In 2024, Thomas J. Harrison, FNP-C had 172 Medicare Part D claims for 82 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions 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.
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.