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Dr. Justin Gainor, MD

Medical Oncologist, Internist, Hematology / Oncology Specialist

Boston, MA

Accepting patients

Affiliated with a Castle Connolly Top Hospital

    Who is Dr. Gainor, Medical Oncologist in Boston, MA?

    Dr. Justin Gainor, MD is a Medical Oncologist, who primarily practices in Boston, MA. He is board certified. Dr. Gainor is currently affiliated with Massachusetts General Hospital. Dr. Gainor is fluent in English, and is currently seeing new patients. Dr. Gainor’s practice accepts Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Gainor’s office.

    Is Dr. Gainor board certified as a Medical Oncologist?

    Yes, Dr. Justin Gainor, MD is board certified by the American Board of Internal Medicine

    What languages does Dr. Gainor speak?

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

    • English

    What conditions does a Medical Oncologist like Dr. Gainor typically treat?

    As a Medical Oncologist, Dr. Gainor 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. Gainor. 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.

    Also known as:

    • Lung Cancer
    • Bronchial cancer
    • Malignant neoplasm of lung
    • Pulmonary cancer
    • Right lung cancer
    • Left Lung Cancer
    • Bronchial Cancer
    • Malignant Lung Tumor

    ICD-10 Codes:

    • C3490: Malignant neoplasm of unspecified part of unspecified bronchus or lung
    • C3491: Malignant neoplasm of unspecified part of right bronchus or lung
    • C3492: Malignant neoplasm of unspecified part of left bronchus or lung

    Also known as:

    • Cancer Chemotherapy
    • Chemo treatment
    • Oncology chemotherapy
    • Cancer drug therapy

    ICD-10 Codes:

    • Z5111: Encounter for antineoplastic chemotherapy

    What procedures does a Medical Oncologist like Dr. Gainor typically perform?

    As a Medical Oncologist, procedures performed by Dr. Justin Gainor may include:

    Please contact Dr. Gainor's office directly to confirm care for your specific procedure, for more information, or to schedule a consultation.

    Does Dr. Gainor accept my insurance?

    Dr. Gainor accepts most major insurance plans. Important: Please contact the office before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. Gainor accept in Boston, MA?

    Dr. Gainor in Boston, MA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.

    Top Insurances

    • Blue Cross Blue Shield of Massachusetts

    • Cigna Group

    • Mass General Brigham

    • Medicare

    • Molina Healthcare

    View All Insurances

    Where is Dr. Gainor's office located?

    Massachusetts General Hospital

    55 Fruit St

    Boston, MA 02114

    Get Directions

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

    Dr. Gainor's National Provider Identifier (NPI) number is 1487813010.

    What common questions do patients ask about Dr. Gainor?

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

    What is Dr. Justin Gainor's specialty?

    Dr. Gainor is a Medical Oncologist near Boston, MA.

    What does a Medical Oncologist do?

    An internist specializing in the diagnosis and treatment of various cancers and both benign and malignant tumors. This specialist determines and administers therapy for malignancies and collaborates with surgeons and radiation oncologists on additional cancer treatment options.

    Is Dr. Justin Gainor affiliated with a ranked Castle Connolly Top Hospital?

    Yes, Dr. Gainor is affiliated with Massachusetts General Hospital, Rhode Island Hospital, Brigham And Women's 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 Medical Oncologist?: Guides for symptoms, conditions, and treatments

    Understand your symptoms and know when it’s time to see a Medical 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 Dr. Justin Gainor accepting new patients in Boston, MA?

    Yes, Dr. Justin Gainor is accepting new patients at this time.

    Does Dr. Justin Gainor offer online booking?

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

    How can I make an appointment with Dr. Justin Gainor?

    Please contact Dr. Gainor's office to schedule an appointment.

    Where is Dr. Gainor's office located?

    Dr. Gainor's office is located in Boston, MA.

    Which board certifications does Dr. Justin Gainor have?

    Dr. Justin Gainor is certified by the American Board of Internal Medicine.