Kathleen Sullivan, DO
Emergency Medicine Physician · West Islip, NY
Kathleen Sullivan, DO is an emergency medicine physician with a practice address in West Islip, New York, and NPI 1437566593, issued on Jul 21, 2014. Check the license (New York 274346-219, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Kathleen Sullivan
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 274346-219 NY
Self-reported in NPPES; status is on the state search - Practice location
- 1000 Montauk Hwy, West Islip, NY 11795
- Phone
- (631) 376-4444
- Enumerated
- Jul 21, 2014
- Record last updated
- Apr 5, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 5,025 in New York → Look up another NPI →
Also registered at 1000 Montauk Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Almothana Aburumman, MDStudent in an Organized Health Care Education/Training Program1669267506
- Hakeem Afuwape, DODiagnostic Radiology Physician1326292806
- Samantha Ahearn, PA-CPhysician Assistant1952279572
- Michele Ahlers, NURSE PRACTITIONERAdult Health Nurse Practitioner1063037869
- Fahim Ahmed, D.O.Emergency Medicine Physician1619904372
Verify Kathleen Sullivan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 274346-219Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average emergency medicine physician in 2024
32 Medicare Part D claims for 22 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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.
The practice group's MIPS final score for 2023 (Medicare payment program): 84.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Kathleen Sullivan among 5,025 emergency medicine physician records in New York
Kathleen Sullivan, DO is one of 5,025 emergency medicine physician records with a practice address in New York. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 59% of them.
- NPI issued2014 · 59% of these records are older, 37% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2021 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
45 emergency medicine physician records list a practice address in West Islip
They are 45 of the 1,107 NPPES records with a practice address in West Islip, and 5,025 emergency medicine physician records in New York.
All 5,025 in New York → Every provider in West Islip → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Fahim Ahmed, D.O.West Islip, NY 117951619904372
- Eric Decena, M.D.West Islip, NY 117951699704007
- Tara DurasWest Islip, NY 117951194821066
- Ronald Dvorkin, MDWest Islip, NY 117951457375925
- Michelle Gebhard, DOWest Islip, NY 117951356365845
- Sanford Glantz, MDWest Islip, NY 117951124042668
- David Levy, DOWest Islip, NY 117951780608166
- Jeffrey Margulies, MDWest Islip, NY 117951689698904
Common questions
What is Kathleen Sullivan, DO's NPI number?
Kathleen Sullivan, DO's National Provider Identifier (NPI) is 1437566593, issued on Jul 21, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Kathleen Sullivan, DO located?
The NPPES record lists a practice address at 1000 Montauk Hwy, West Islip, NY, 11795. Phone: (631) 376-4444. Providers update this record themselves, so call before visiting.
How can I verify Kathleen Sullivan, DO's license?
NPPES lists New York license number 274346-219, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Kathleen Sullivan, DO prescribe under Medicare Part D?
In 2024, Kathleen Sullivan, DO had 32 Medicare Part D claims for 22 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Kathleen Sullivan, DO's MIPS final score?
The 2023 MIPS final score is 84.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.