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Dr. O'neil Mason, MD

Morristown, NJ

Accepting patients

Affiliated with a Castle Connolly Top Hospital

    Who is Dr. Mason, Cardiologist in Morristown, NJ?

    Dr. O'neil Mason, MD is a Cardiologist, who primarily practices in Morristown, NJ. Dr. Mason is fluent in English, and is currently seeing new patients. Dr. Mason’s practice accepts Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Mason’s office at (312) 926-2000.

    What languages does Dr. Mason speak?

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

    • English

    What conditions does a Cardiologist like Dr. Mason typically treat?

    As a Cardiologist, Dr. Mason 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. Mason. 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:

    • Narrowed Aortic Valve
    • Leaky Mitral Valve
    • Heart Valve Disease
    • Aortic Valve Stenosis
    • Tight Aortic Valve
    • Mitral Valve Insufficiency
    • Mitral Regurgitation

    ICD-10 Codes:

    • I350: Nonrheumatic aortic (valve) stenosis
    • I340: Nonrheumatic mitral (valve) insufficiency

    Also known as:

    • Having a Prosthetic Heart Valve
    • Heart Valve Disease
    • Artificial heart valve
    • Mechanical heart valve
    • Bioprosthetic valve

    ICD-10 Codes:

    • Z952: Presence of prosthetic heart valve

    Also known as:

    • Chronic Systolic Heart Failure
    • Heart Failure
    • Long-term Systolic Heart Failure
    • Chronic HFrEF
    • Ongoing Pumping Heart Failure

    ICD-10 Codes:

    • I5022: Chronic systolic (congestive) heart failure

    What procedures does a Cardiologist like Dr. Mason typically perform?

    As a Cardiologist, procedures performed by Dr. O'neil Mason may include:

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

    Does Dr. Mason accept my insurance?

    Dr. Mason accepts most major insurance plans. Important: Please call our office at (312) 926-2000 before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. Mason accept in Morristown, NJ?

    Dr. Mason in Morristown, NJ accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.

    Top Insurances

    • Carepoint Health

    • Cigna Group

    • CVS Health (formerly Aetna)

    • Elevance Health Inc. (formerly Anthem)

    • Horizon BlueCross BlueShield

    • Horizon Mutual Holdings

    • Medicare

    • Promedica Health Systems

    • Service Employees International Union (SEIU)

    • UnitedHealth Group

    View All Insurances

    Where is Dr. Mason's office located?

    Dr. O'neil Mason's Primary Practice

    100 Madison Ave

    Morristown, NJ 07960

    (312) 926-2000

    Get Directions

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

    Dr. Mason's National Provider Identifier (NPI) number is 1699046748.

    What common questions do patients ask about Dr. Mason?

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

    What is Dr. O'neil Mason's specialty?

    Dr. Mason is a Cardiologist near Morristown, NJ.

    What does a Cardiologist do?

    An internist specializing in cardiovascular diseases focuses on the diagnosis and management of complex heart and blood vessel conditions, including heart attacks and life-threatening arrhythmias.

    Is Dr. O'neil Mason affiliated with a ranked Castle Connolly Top Hospital?

    Yes, Dr. Mason is affiliated with Atlantic Health Morristown Medical Center which is a Castle Connolly Top Hospital. 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 Cardiologist?: Guides for symptoms, conditions, and treatments

    Understand your symptoms and know when it’s time to see a Cardiologist. 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. O'neil Mason accepting new patients in Morristown, NJ?

    Yes, Dr. O'neil Mason is accepting new patients at this time.

    Does Dr. O'neil Mason offer online booking?

    Please contact Dr. Mason's office at (312) 926-2000 for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with Dr. O'neil Mason?

    Please contact Dr. Mason's office at (312) 926-2000 to schedule an appointment.

    Where is Dr. Mason's office located?

    Dr. Mason's office is located in Morristown, NJ.