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CASSANDRA MARIE O'CONNOR MD
NPI 1184200289
Internal Medicine in Roslyn, NY

Active since March 20, 2021PECOS EnrolledAccepts Medicare Assignment
100 PORT WASHINGTON BLVD, ROSLYN, NY 11576(516) 562-6000 Get Directions Write a Review

NPPES record last updated: August 8, 2024. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Aug 8, 2024, Mar 20, 2021 (2 updates tracked since 2021).

About Cassandra Marie O'connor Md NPPES

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

CASSANDRA MARIE O'CONNOR MD (NPI 1184200289) is an individual internal medicine provider in Roslyn, New York, licensed in New York (33108401) and active in the NPI registry since March 2021. She is enrolled in Medicare PECOS, is affiliated with St Francis Hospital - The Heart Center, and is a graduate of Other (2020).

NPPES Registry Identity

NPI1184200289
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameCASSANDRA MARIE O'CONNORCredential: MD
Location Address100 PORT WASHINGTON BLVDRoslyn, NY 11576-1353
Mailing Address929 S 6th StLindenhurst, NY 11757-5510 · (163) 187-3830
Phone(516) 562-6000
Sole ProprietorNo
Medical School CMSOtherGraduated 2020
Enumeration DateMarch 20, 2021
Last NPPES UpdateAugust 8, 20242 updates tracked since enumeration
NPPES CertifiedAugust 8, 2024
✔ NPI 1184200289 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in NY · 33108401
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
100 PORT WASHINGTON BLVD, Roslyn, NY 11576
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Cassandra Marie O'connor Md 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 ID4082151840
PECOS Enrollment IDI20240730002188
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.

Areas of Expertise CMS Part B claims 3

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
590 services219 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
143 services136 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
51 services51 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

St Francis Hospital - The Heart Center

Acute Care Hospitals · Roslyn, NY
5/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number330182
Location100 Port Washington BoulevardRoslyn, NY 11576 · Nassau County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11576 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
$154.28 typical visit price
range $67.40 – $203.53
Typical copayment $38.57 (range $16.85 – $50.88)
Most-billed visit code 99204
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.

ERIN MARIE MARKEY R.N.,M.S.,APRN-BC
Nurse Practitioner (Acute Care)
100 PORT WASHINGTON BLVD
ROSLYN, NY 11576
Nassau County (516) 562-6351
DR. MENA YACOUB D.O
Internal Medicine (Clinical Cardiac Electrophysiology)
100 PORT WASHINGTON BLVD
ROSLYN, NY 11576
Nassau County (718) 689-0316
JULIA COHEN
Physician Assistant
100 PORT WASHINGTON BLVD
ROSLYN, NY 11576
Nassau County (516) 562-6000
PEDIATRIC CARDIOLOGY OF LI PC
Pediatrics (Pediatric Cardiology)
100 PORT WASHINGTON BLVD, SUITE 108
ROSLYN, NY 11576
Nassau County (516) 365-3340
PATRICK BRENNAN P.A.
Physician Assistant
100 PORT WASHINGTON BLVD
ROSLYN, NY 11576
Nassau County (516) 338-5358
KENNETH ZIELINSKI P.A.
Physician Assistant
100 PORT WASHINGTON BLVD
ROSLYN, NY 11576
Nassau County (516) 338-5358
DR. STEFAN MILTON MUEHLBAUER M.D., PHD
Emergency Medicine
100 PORT WASHINGTON BLVD, DEPT OF EMERGENCY MEDICINE
ROSLYN, NY 11576
Nassau County (165) 626-6055
MRS. MELISSA A MORELLI FNP-C
Nurse Practitioner (Family)
100 PORT WASHINGTON BLVD, ST. FRANCIS HOSPITAL EMERGENCY ROOM
ROSLYN, NY 11576
Nassau County (516) 562-6600

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 Cassandra O'connor's NPI number?

The NPI number for Cassandra O'connor is 1184200289. It was assigned to this individual provider in the NPPES registry on March 20, 2021.

Where is Cassandra O'connor located?

Cassandra O'connor practices at 100 Port Washington Blvd, Roslyn, NY 11576. The listed phone number is (516) 562-6000.

What is Cassandra O'connor's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Cassandra O'connor enrolled in Medicare?

Yes. Cassandra O'connor is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Cassandra O'connor affiliated with any hospitals?

According to CMS data, Cassandra O'connor is affiliated with St Francis Hospital - The Heart Center.

When was this NPI record last updated?

The NPPES record for Cassandra O'connor was last updated on August 8, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.