KATHLEEN SULLIVAN DO
NPI 1437566593
Emergency Medicine in West Islip, NY
About Kathleen Sullivan Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KATHLEEN SULLIVAN DO (NPI 1437566593) is an individual emergency medicine provider in West Islip, New York, licensed in New York (274346-219) and active in the NPI registry since July 2014. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Kathleen Sullivan Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Kathleen Sullivan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Boynton Beach, FL 33426
- Reassigned Medicare billing, New York enrollment
- 7,712 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 4
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.
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.
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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WEST ISLIP, NY 11795
WEST ISLIP, NY 11795
WEST ISLIP, NY 11795
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 Kathleen Sullivan's NPI number?
The NPI number for Kathleen Sullivan is 1437566593. It was assigned to this individual provider in the NPPES registry on July 21, 2014.
Where is Kathleen Sullivan located?
Kathleen Sullivan practices at 1000 Montauk Hwy, West Islip, NY 11795. The listed phone number is (631) 376-4444.
What is Kathleen Sullivan's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Kathleen Sullivan enrolled in Medicare?
Yes. Kathleen Sullivan is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Kathleen Sullivan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kathleen Sullivan reassigns Medicare benefits to New York University (Boynton Beach, FL). The 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 Kathleen Sullivan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Kathleen Sullivan was last updated on April 5, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Kathleen Sullivan, DO · NPI 1437566593
Emergency Medicine physician in West Islip, New York. Individual provider, active in the CMS NPPES registry since July 21, 2014.
## Identity
- **NPI:** 1437566593 (Entity type: Individual)
- **Enumerated:** July 21, 2014
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 274346-219 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 1000 MONTAUK HWY, West Islip, NY 11795-4927
- **Phone:** (631) 376-4444
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** New York University (NPI 1285826438, Boynton Beach, FL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 5, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1437566593) · Data from the CMS NPPES public registry.