Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Johnny Kao, MD

Individual provider Radiation Oncology Physician · NPI 1639141476

Johnny Kao, MD practises Radiation Oncology in West Islip, New York. Graduated from Icahn School of Medicine at Mount Sinai in 2000, 26 years ago. Practices with Good Samaritan Hospital Medical Center, a 147-clinician group and accepts Medicare assignment. Licensed in Florida and New York.

Years since qualifying
26
Trained at
Icahn School of Medicine at Mount Sinai
Licensed in
FL, NY
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1000 Montauk Hwy
West Islip, NY 11795-4927 Not confirmed with CMS for 13 years — call before visiting
Phone: (631) 376-4047
Fax: (631) 376-3392
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence 234755 (NY)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence ME 108316 (FL)

Record details

NPI number1639141476
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 6, 2006
Last updated in NPPESFebruary 14, 2013

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyRADIATION ONCOLOGY
Medical schoolICAHN SCHOOL OF MEDICINE AT MOUNT SINAI
Graduated 2000 (26 years in practice)
Group practice Good Samaritan Hospital Medical Center — 147 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients411
Services billed 6,244 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $31 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Good Samaritan Hospital Medical Center

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 147 clinicians in the practice; 12 are shown here.

Other providers in West Islip