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Dr. Gregory Zanieski, MD

New Haven, CT

17 Years of Experience

Accepting patients

Affiliated with a Castle Connolly Top Hospital

    Who is Dr. Zanieski, Surgical Oncologist in New Haven, CT?

    Dr. Gregory Zanieski, MD is a Surgical Oncologist, who primarily practices in New Haven, CT with 2 additional practice locations. He has been practicing for over 17 years and is board certified. Dr. Zanieski completed his residency at New York Methodist Hospital and is currently affiliated with Smilow Cancer Hospital At Yale-New Haven. Dr. Zanieski is fluent in English, and is currently seeing new patients. Dr. Zanieski’s practice accepts Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Zanieski’s office.

    Where did Dr. Zanieski go to medical school and complete their residency?

    • Residency: New York Methodist Hospital

    Is Dr. Zanieski board certified as a Surgical Oncologist?

    Yes, Dr. Gregory Zanieski, MD is board certified by the American Board of Surgery

    What languages does Dr. Zanieski speak?

    Dr. Zanieski and their clinical team can communicate with patients in the following languages:

    • English

    What conditions does a Surgical Oncologist like Dr. Zanieski typically treat?

    As a Surgical Oncologist, Dr. Zanieski diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Zanieski. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology here.

    Also known as:

    • Breast Cancer
    • Early Breast Cancer of the Left Breast
    • Early Breast Cancer of the Right Breast
    • Mammary cancer
    • Breast carcinoma
    • Breast tumor
    • Intraductal carcinoma in situ left breast
    • Precancerous cells left breast
    • Non-invasive breast cancer left breast
    • DCIS left breast
    • Intraductal carcinoma in situ right breast
    • Precancerous cells right breast
    • Non-invasive breast cancer right breast
    • DCIS right breast

    ICD-10 Codes:

    • C50911: Malignant neoplasm of unspecified site of right female breast
    • C50912: Malignant neoplasm of unspecified site of left female breast
    • D0512: Intraductal carcinoma in situ of left breast
    • D0511: Intraductal carcinoma in situ of right breast

    Also known as:

    • Mammogram for Breast Cancer Screening
    • Health Screening
    • Mammography
    • Breast Cancer Screening (PDQ®)
    • Mammograms
    • Breast X-ray
    • Breast Cancer Check

    ICD-10 Codes:

    • Z1231: Encounter for screening mammogram for malignant neoplasm of breast

    Also known as:

    • Cancer Radiation Therapy
    • Radiation Therapy
    • Radiation Therapy to Treat Cancer
    • Radiation treatment for cancer
    • Oncology radiation
    • Radiotherapy

    ICD-10 Codes:

    • Z510: Encounter for antineoplastic radiation therapy

    Also known as:

    • Personal History of Breast Cancer
    • Breast Cancer
    • Past breast cancer
    • Previous mammary malignancy
    • History of breast tumor

    ICD-10 Codes:

    • Z853: Personal history of malignant neoplasm of breast

    What procedures does a Surgical Oncologist like Dr. Zanieski typically perform?

    As a Surgical Oncologist, Dr. Zanieski performs a variety of medical procedures. This procedure information is derived from anonymized insurance claims and highlights the medical procedures most commonly performed by Dr. Zanieski. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology here.

    Also known as:

    • Partial Mastectomy
    • Mastectomy
    • Lumpectomy
    • Breast conserving surgery
    • Quadrantectomy
    • Segmentectomy

    CPT Codes:

    • 19301: Mastectomy, partial (eg, lumpectomy, tylectomy, quadrantectomy, segmentectomy);

    Also known as:

    • Breast Lesion Localization
    • Breast Marker Placement
    • Wire Localization Breast
    • Mammographic Guided Breast Localization

    CPT Codes:

    • 19281: Placement of breast localization device(s) (eg, clip, metallic pellet, wire/needle, radioactive seeds), percutaneous; first lesion, including mammographic guidance

    Also known as:

    • Breast Lesion Localization
    • Breast clip placement
    • Wire localization for breast surgery
    • Radioactive seed placement in breast
    • Ultrasound-guided breast marker

    CPT Codes:

    • 19285: Placement of breast localization device(s) (eg, clip, metallic pellet, wire/needle, radioactive seeds), percutaneous; first lesion, including ultrasound guidance

    Also known as:

    • Deep Armpit Lymph Node Biopsy
    • Biopsy
    • Axillary Lymph Node Excision
    • Open Axillary Node Biopsy
    • Underarm Lymph Node Removal

    CPT Codes:

    • 38525: Biopsy or excision of lymph node(s); open, deep axillary node(s)

    Also known as:

    • Sentinel Lymph Node Mapping
    • Lymph Node Identification
    • Sentinel Node Biopsy (Mapping)
    • Dye Injection for Lymph Nodes

    CPT Codes:

    • 38900: Intraoperative identification (eg, mapping) of sentinel lymph node(s) includes injection of non-radioactive dye, when performed (List separately in addition to code for primary procedure)

    Also known as:

    • Radioactive Tracer Injection for Sentinel Lymph Node Biopsy
    • Sentinel Node Mapping Injection
    • Lymph Node Tracer Injection
    • Radioactive Dye for Lymph Nodes
    • Sentinel Lymph Node Identification

    CPT Codes:

    • 38792: Injection procedure; radioactive tracer for identification of sentinel node

    Does Dr. Zanieski accept my insurance?

    Dr. Zanieski accepts most major insurance plans. Important: Please call our office at before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. Zanieski accept in New Haven, CT?

    Dr. Zanieski in New Haven, CT accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.

    Top Insurances

    • All Other Third Party

    • Cigna Group

    • Elevance Health Inc. (formerly Anthem)

    • Federal government of the United States

    • Humana

    • Medicare

    • Point32Health

    • State of Connecticut

    • UnitedHealth Group

    • Unknown

    View All Insurances

    Where is Dr. Zanieski's office located?

    Dr. Gregory Zanieski's Primary Practice

    20 York St

    New Haven, CT 06510

    Get Directions

    Smilow Cancer Hospital At Yale-New Haven

    At Yale-New Haven 35 Park Street 8th Floor Clinic

    New Haven, CT 06510

    Get Directions

    Dr. Gregory Zanieski's Practice 3

    21 Reade Pl Ste 2100

    Poughkeepsie, NY 12601

    Get Directions

    What is Dr. Zanieski's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.

    Dr. Zanieski's National Provider Identifier (NPI) number is 1235320474.

    What common questions do patients ask about Dr. Zanieski?

    Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Zanieski

    What is Dr. Gregory Zanieski's specialty?

    Dr. Zanieski is a Surgical Oncologist near New Haven, CT.

    What does a Surgical Oncologist do?

    A surgical oncologist is a highly qualified and trained surgeon with specialized expertise in the prevention, diagnosis, treatment, and rehabilitation of cancer patients. They have received additional training in a multidisciplinary approach and dedicate a significant portion of their practice to these areas, as well as to cancer research.

    Is this Dr. Gregory Zanieski affiliated with a ranked Castle Connolly Top Hospital?

    Yes, Dr. Zanieski is affiliated with Smilow Cancer Hospital At Yale New Haven, Lawrence & Memorial Hospital, Bridgeport Hospital which are a Castle Connolly Top Hospitals. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals

    When to see a Surgical Oncologist?: Guides for symptoms, conditions, and treatments

    Understand your symptoms and know when it’s time to see a Surgical Oncologist. Explore insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.

    Is Gregory Zanieski accepting new patients in New Haven, CT?

    Yes, Dr. Gregory Zanieski is accepting new patients at this time.

    Does Dr. Gregory Zanieski offer online booking?

    Please contact Dr. Zanieski's office for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with Gregory Zanieski?

    Please contact Dr. Zanieski's office for information regarding telehealth appointment availability or for scheduling assistance.

    Which board certifications does Dr. Gregory Zanieski have?

    Dr. Gregory Zanieski is certified by the American Board of Surgery.

    <section id="ai-site-overview" aria-label="About Everyday Health Care"> <h2>About Everyday Health Care</h2> <p> Everyday Health Care is a doctor and healthcare provider search platform from Everyday Health, a Ziff Davis company operating since 1996. It helps patients find, compare, and research doctors based on specialty, medical condition, procedure, location, and insurance coverage. </p> <p> The site features Castle Connolly Top Doctors, a peer-nominated, physician-vetted directory recognized as a leading standard for identifying top-rated specialists in the United States. Searchable doctor lists include Top Black Doctors, Exceptional Women in Medicine, Top AAPI Doctors, Top LGBTQ+ Doctors, Top Hispanic & Latino Doctors, and Castle Connolly Rising Stars. </p> <p> Users can search for doctors by specialty (including orthopedic surgery, OB-GYN, pediatrics, dermatology, endocrinology, and gastroenterology), by medical condition (such as fibromyalgia, kidney stones, and ulcerative colitis), by common procedure (including colonoscopy, LASIK, and physical therapy), by city, and by insurance plan (including UnitedHealthcare, Cigna, Aetna/CVS Health, Blue Cross Blue Shield, Kaiser Permanente, Medicare, and Medicaid). </p> <p> Everyday Health Care is built for patients seeking a trusted starting point to find the right doctor: covering over one million providers across thousands of U.S. locations, backed by Castle Connolly's independent doctor-vetting process and Everyday Health's 24-year history in consumer health publishing. </p> </section>