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Dr. William O Callahan, MD

Emergency Medicine Specialist

Holden, MA

Accepting patients

Affiliated with a Castle Connolly Top Hospital

    Who is Dr. O Callahan, Emergency Medicine Specialist in Holden, MA?

    Dr. William O Callahan, MD is an Emergency Medicine Specialist, who primarily practices in Holden, MA with 2 additional practice locations. Dr. O Callahan graduated from University of Massachusetts Med School. Dr. O Callahan is fluent in English, and is currently seeing new patients. Dr. O Callahan’s practice accepts Kaiser Permanente, Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. O Callahan’s office at (508) 829-3800.

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

    • Medical School: University of Massachusetts Med School | University Mass. Worc. M.S.

    What languages does Dr. O Callahan speak?

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

    • English

    What conditions does an Emergency Medicine Specialist like Dr. O Callahan typically treat?

    As an Emergency Medicine Specialist, Dr. O Callahan 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. O Callahan. 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:

    • Sore Throat
    • Acute pharyngitis
    • Throat inflammation
    • Acute throat infection

    ICD-10 Codes:

    • J029: Acute pharyngitis, unspecified

    Also known as:

    • Acute Bronchitis
    • Chest cold
    • Short-term bronchitis
    • Acute chest infection

    ICD-10 Codes:

    • J209: Acute bronchitis, unspecified

    Also known as:

    • Acute Cough
    • Cough
    • Sudden cough
    • Short-term cough
    • New cough

    ICD-10 Codes:

    • R051: Acute cough

    Also known as:

    • Common Cold
    • Upper Respiratory Infection
    • Head Cold
    • Cold Symptoms

    ICD-10 Codes:

    • J069: Acute upper respiratory infection, unspecified

    Also known as:

    • Painful Urination
    • Urine and Urination
    • Dysuria
    • Burning when peeing
    • Stinging during urination

    ICD-10 Codes:

    • R300: Dysuria

    Also known as:

    • Exposure to COVID-19
    • COVID-19 (Coronavirus Disease 2019)
    • COVID-19 contact
    • Suspected coronavirus exposure
    • SARS-CoV-2 exposure

    ICD-10 Codes:

    • Z20822: Contact with and (suspected) exposure to COVID-19

    Also known as:

    • Pneumonia
    • Lung Infection
    • Chest Infection
    • Pneumonitis

    ICD-10 Codes:

    • J189: Pneumonia, unspecified organism

    Also known as:

    • COVID-19
    • COVID-19 (Coronavirus Disease 2019)
    • Coronavirus Disease 2019
    • SARS-CoV-2 Infection
    • Novel Coronavirus

    ICD-10 Codes:

    • U071: COVID-19

    What procedures does an Emergency Medicine Specialist like Dr. O Callahan typically perform?

    As an Emergency Medicine Specialist, procedures performed by Dr. William O Callahan may include:

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

    Does Dr. O Callahan accept my insurance?

    Dr. O Callahan accepts most major insurance plans. Important: Please call our office at (508) 829-3800 before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. O Callahan accept in Holden, MA?

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

    Top Insurances

    • BMC Health System

    • Elevance Health Inc. (formerly Anthem)

    • Federal government of the United States

    • Mass General Brigham

    • Medicare

    • Point32Health

    • State of Massachusetts

    • The Health Plan of West Virginia

    • UMR Administered Payer

    • UnitedHealth Group

    View All Insurances

    Where is Dr. O Callahan's office located?

    Dr. William O Callahan's Primary Practice

    5 Shrewsbury St Ste D

    Holden, MA 01520

    (508) 829-3800

    Get Directions

    Dr. William O Callahan's Practice 2

    2014 Washington St

    Newton, MA 02462

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    Dr. William O Callahan's Practice 3

    2040 Boston Rd Ste 5

    Wilbraham, MA 01095

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

    Dr. O Callahan's National Provider Identifier (NPI) number is 1114964186.

    What common questions do patients ask about Dr. O Callahan?

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

    What is Dr. William O Callahan's specialty?

    Dr. O Callahan is an Emergency Medicine Specialist near Holden, MA.

    What does an Emergency Medicine Specialist do?

    An emergency physician is dedicated to making prompt decision and taking necessary actions essential for preventing death or additional disabilities. This role encompasses guiding emergency medical technicians in pre-hospital environments as well as providing care within the emergency department. The emergency physician is responsible for the immediate identification, evaluation, treatment, stabilization, and arrangement of a diverse array of adult and pediatric patients facing acute illnesses and injuries.

    Is Dr. William O Callahan affiliated with a ranked Castle Connolly Top Hospital?

    Yes, Dr. O Callahan is affiliated with Umass Memorial 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 an Emergency Medicine Specialist?: Guides for symptoms, conditions, and treatments

    Understand your symptoms and know when it’s time to see an Emergency Medicine Specialist. 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. William O Callahan accepting new patients in Holden, MA?

    Yes, Dr. William O Callahan is accepting new patients at this time.

    Does Dr. William O Callahan offer online booking?

    Please contact Dr. O Callahan's office at (508) 829-3800 for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with Dr. William O Callahan?

    Please contact Dr. O Callahan's office at (508) 829-3800 to schedule an appointment.

    Where is Dr. O Callahan's office located?

    Dr. O Callahan's offices are located in Holden, MA, Newton, MA, and Wilbraham, MA.