THOMAS J HARRISON FNP-C
NPI 1083642938
Nurse Practitioner - Family in West Islip, NY

Q: What is Thomas Harrison's NPI number?

The NPI number for Thomas Harrison is 1083642938. It was assigned to this individual provider in the NPPES registry on June 29, 2006.

Q: What is Thomas Harrison's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Q: When was this NPI record last updated?

The NPPES record for Thomas Harrison was last updated on December 11, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.

Active since June 29, 2006PECOS EnrolledAccepts Medicare Assignment

540 UNION BLVD, WEST ISLIP, NY 11795(631) 669-2555(631) 669-5787 Get Directions Write a Review

NPPES record last updated: December 11, 2014. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Thomas J Harrison Fnp-c NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

THOMAS J HARRISON FNP-C (NPI 1083642938) is an individual family provider in West Islip, New York, licensed in New York (F334847) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Ns/lij Hs Southside Hospital, and is a graduate of State University Of New York At Stony Brook, School Of Medicine (2005).

NPPES Registry Identity

NPI1083642938

Entity TypeIndividualMale

Primary Taxonomy363LF0000X

Provider Legal NameTHOMAS J HARRISONCredential: FNP-C

Location Address540 UNION BLVDWest Islip, NY 11795-3105

Mailing AddressPo Box 1609Port Washington, NY 11050-7609 · (631) 669-2555 · Fax (631) 669-5787

Phone(631) 669-2555

Fax(631) 669-5787

Sole ProprietorNo

Medical School CMSState University Of New York At Stony Brook, School Of MedicineGraduated 2005

Enumeration DateJune 29, 2006

Last NPPES UpdateDecember 11, 2014

✔ NPI 1083642938 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LF0000X

License✔ Licensed in NY · F334847

Also ListedRegistered NurseTaxonomy 163W00000X · License F334847 (NY)

540 UNION BLVD, West Islip, NY 11795

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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

Thomas J Harrison Fnp-c 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.

PECOS PAC ID5890899736

PECOS Enrollment IDI20070402000460

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Thomas Harrison reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

St. Francis Hospital

Same address

Cardiovascular Disease

540 UNION BLVD
West Islip, NY 11795

Reassigned Medicare billing, New York enrollment
187 clinicians in this Medicare group

NPI 1528386810 (631) 669-5595

North Shore - Lij Medical PC

22 mi

Internal Medicine

270-05 76TH AVE
New Hyde Park, NY 11040

Reassigned Medicare billing, New York enrollment
9,353 clinicians in this Medicare group

NPI 1790043479 (516) 465-8089

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.

Ns/Lij Hs Southside Hospital

Acute Care Hospitals · Bay Shore, NY

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330043

Location301 East Main StreetBay Shore, NY 11706 · Suffolk County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11795 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$105.06 typical visit price

range $67.40 – $203.53

Typical copayment $26.26 (range $16.85 – $50.88)

Most-billed visit code 99203

Established Patient

$117.62 typical visit price

range $21.66 – $164.45

Typical copayment $29.40 (range $5.41 – $41.11)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

ASHLEY ANNE HUBBARD NP-C

Nurse Practitioner (Adult Health)