Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Cassandra Marie O'Connor, MD

Individual provider Internal Medicine Physician · NPI 1184200289

Cassandra Marie O'Connor, MD is an Internal Medicine in Roslyn, New York. Qualified in 2020, 6 years ago. Practices with Southwest Suffolk Medical PC, a 200-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
6
Licensed in
NY
In the registry since
2021
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

100 Port Washington Blvd
Roslyn, NY 11576-1353
Phone: (516) 562-6000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 33108401 (NY)

Record details

NPI number1184200289
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 20, 2021
Last updated in NPPESAugust 8, 2024
Certification dateAugust 8, 2024

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2020 (6 years in practice)
Group practice Southwest Suffolk Medical Pc — 200 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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