Cassandra Marie O'connor, MD - Medicare Internal Medicine in Roslyn, NY

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Cassandra Marie O'connor, MD is a medicare enrolled "Internal Medicine" physician in Roslyn, New York. Her current practice location is 100 Port Washington Blvd, Roslyn, New York. You can reach out to her office (for appointments etc.) via phone at (516) 562-6000.

Cassandra Marie O'connor is licensed to practice in New York (license number 33108401) and she also participates in the medicare program. She does not accept medicare assignments directly but she may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. Her NPI Number is 1184200289.

Contact Information

Cassandra Marie O'connor, MD
100 Port Washington Blvd,
Roslyn, NY 11576-1353
(516) 562-6000
Not Available

Map and Direction




Physician's Profile

Full NameCassandra Marie O'connor
GenderFemale
SpecialityInternal Medicine
Location100 Port Washington Blvd, Roslyn, New York
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1184200289
  • Provider Enumeration Date: 03/20/2021
  • Last Update Date: 08/08/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 4082151840
  • Enrollment ID: I20240730002188

Medical Identifiers

Medical identifiers for Cassandra Marie O'connor such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1184200289NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 33108401 (New York)Primary

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Cassandra Marie O'connor allows following entities to bill medicare on her behalf.
Entity NameSouthwest Suffolk Medical Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1104096049
PECOS PAC ID: 0244396349
Enrollment ID: O20090225000297

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Cassandra Marie O'connor is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Cassandra Marie O'connor, MD
929 S 6th St,
Lindenhurst, NY 11757-5510

Ph: (163) 187-3830		Cassandra Marie O'connor, MD
100 Port Washington Blvd,
Roslyn, NY 11576-1353

Ph: (516) 562-6000

Reviews and Comments


Internal Medicine Doctors in Roslyn, NY

Dr. Roosha Parikh, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 100 Port Washington Blvd, Roslyn, NY 11576
Phone: 516-622-4508    Fax: 713-790-2643
Dr. Maria V Fedoseeva, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 100 Port Washington Blvd, Roslyn, NY 11576
Phone: 516-562-6385    Fax: 516-562-6300
San San Wynn, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 56 Hamilton Dr, Roslyn, NY 11576
Phone: 718-498-5754    Fax: 718-498-0950
Dr. Aimee Cowan, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 100 Port Washington Blvd, Roslyn, NY 11576
Phone: 516-562-6000    
Dr. Sanford R Goldberg, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 1800 Northern Blvd, Roslyn, NY 11576
Phone: 516-277-4027    Fax: 516-801-5928
Ryan Murphy, D.O.
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 100 Port Washington Blvd Ste G02, Roslyn, NY 11576
Phone: 516-629-2090    Fax: 516-629-2094
Dr. Paul Arthur Feffer, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 7 Wimbledon Dr, Roslyn, NY 11576
Phone: 516-365-3411    Fax: 516-365-3411

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.