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Dr. Michael O'neill, MD

Hartford, CT

Accepting patients

Affiliated with a Castle Connolly Top Hospital

    Who is Dr. O'neill, Internist in Hartford, CT?

    Dr. Michael O'neill, MD is an Internist, who primarily practices in Hartford, CT with 2 additional practice locations. He is board certified. Dr. O'neill is fluent in English, and is currently seeing new patients. Dr. O'neill’s practice accepts Medicare, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. O'neill’s office at (203) 384-3000.

    What languages does Dr. O'neill speak?

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

    • English

    What conditions does Dr. O'neill treat?

    As a Internist, Dr. O'neill 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'neill. 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.

    Also known as:

    • Routine Adult Health Checkup
    • Health Checkup
    • Adult physical exam
    • Annual wellness visit for adults
    • General adult medical exam

    ICD-10 Codes:

    • Z0000: Encounter for general adult medical examination without abnormal findings

    Also known as:

    • High Blood Pressure
    • Hypertension
    • Primary Hypertension
    • Essential Hypertension

    ICD-10 Codes:

    • I10: Essential (primary) hypertension

    Also known as:

    • Adult Health Checkup with Abnormal Findings
    • Health Checkup
    • Adult Physical Exam with Issues
    • Routine Checkup with Concerns
    • General Medical Exam with Abnormal Results

    ICD-10 Codes:

    • Z0001: Encounter for general adult medical examination with abnormal findings

    Also known as:

    • Other Specific B Vitamin Deficiency
    • B Vitamins
    • Malnutrition
    • Specific B Vitamin Shortage
    • Less Common B Vitamin Deficiency
    • Rare B Vitamin Deficiency

    ICD-10 Codes:

    • E538: Deficiency of other specified B group vitamins

    Also known as:

    • Other Pre-Procedure Examination
    • Various pre-op checks
    • Miscellaneous pre-surgery exams
    • Other pre-treatment assessments

    ICD-10 Codes:

    • Z01818: Encounter for other preprocedural examination

    Also known as:

    • Other Specific Healthcare Encounters
    • Special Medical Visits
    • Unusual Doctor Appointments
    • Healthcare for Unique Situations

    ICD-10 Codes:

    • Z7689: Persons encountering health services in other specified circumstances

    Also known as:

    • Immunization Visit
    • Vaccines
    • Vaccination appointment
    • Shot visit
    • Immunization encounter

    ICD-10 Codes:

    • Z23: Encounter for immunization

    Also known as:

    • Type 2 Diabetes
    • Diabetes Type 2
    • Type 2 diabetes
    • Diabetes Mellitus Type 2
    • Adult-Onset Diabetes
    • Non-Insulin Dependent Diabetes

    ICD-10 Codes:

    • E119: Type 2 diabetes mellitus without complications

    Also known as:

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

    ICD-10 Codes:

    • J069: Acute upper respiratory infection, unspecified

    Also known as:

    • Prediabetes
    • Insulin Resistance & Prediabetes
    • Borderline diabetes
    • Insulin resistance
    • High blood sugar (not yet diabetes)

    ICD-10 Codes:

    • R7303: Prediabetes

    Also known as:

    • Low Back Pain
    • Back Pain
    • Lumbago
    • Lower Back Ache
    • Backache

    ICD-10 Codes:

    • M5450: Low back pain, unspecified

    Also known as:

    • Vitamin D Deficiency
    • Low Vitamin D Levels
    • Lack of Vitamin D
    • Hypovitaminosis D

    ICD-10 Codes:

    • E559: Vitamin D deficiency, unspecified

    Also known as:

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

    ICD-10 Codes:

    • J029: Acute pharyngitis, unspecified

    Also known as:

    • Follow-up After Treatment (Non-Cancer)
    • Post-Treatment Check-up
    • Aftercare Visit
    • Recovery Monitoring Exam

    ICD-10 Codes:

    • Z09: Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm

    Also known as:

    • Neck Pain
    • Neck Injuries and Disorder
    • Cervical Pain
    • Sore Neck
    • Neck Ache

    ICD-10 Codes:

    • M542: Cervicalgia

    Also known as:

    • Anxiety Disorder
    • Anxiety
    • General Anxiety
    • Anxiety Problems
    • Nervous Disorder

    ICD-10 Codes:

    • F419: Anxiety disorder, unspecified

    Also known as:

    • Pain in Right Knee
    • Knee Injuries and Disorder
    • Pain
    • Right Knee Ache
    • Right Knee Discomfort
    • Sore Right Knee

    ICD-10 Codes:

    • M25561: Pain in right knee

    Also known as:

    • Fatigue
    • Tiredness
    • Lack of energy
    • Exhaustion

    ICD-10 Codes:

    • R5383: Other fatigue

    Also known as:

    • Dizziness
    • Dizziness and Vertigo
    • Lightheadedness
    • Giddiness
    • Vertigo

    ICD-10 Codes:

    • R42: Dizziness and giddiness

    Also known as:

    • Heart Palpitations
    • Arrhythmia
    • Skipped Heartbeat
    • Fluttering Heart
    • Pounding Heart

    ICD-10 Codes:

    • R002: Palpitations

    Which procedures does Dr. O'neill perform as a Internist?

    As a Internist, procedures performed by an Dr. Michael O'neill may include:

    For detailed information, please contact Dr. O'neill's office.

    Does Dr. O'neill accept my insurance?

    Dr. O'neill accepts most major insurance plans. Important: Please call our office at (203) 384-3000 before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. O'neill accept in Hartford, CT?

    Dr. O'neill in Hartford, 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

    • Centene

    • CVS Health (formerly Aetna)

    • Elevance Health Inc. (formerly Anthem)

    • EmblemHealth

    • Express Scripts

    • Medicare

    • OptumRx

    • State of Connecticut

    • UnitedHealthcare

    View All Insurances

    Where is Dr. O'neill's office located?

    Dr. Michael O'neill's Primary Practice

    85 Seymour St Ste 227

    Hartford, CT 06106

    (203) 384-3000

    Get Directions

    Dr. Michael O'neill's Practice 2

    1 Hospital Plz

    Stamford, CT 06902

    Get Directions

    Dr. Michael O'neill's Practice 3

    300 Seaside Ave

    Milford, CT 06460

    Get Directions

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

    Dr. O'neill's National Provider Identifier (NPI) number is 1356873319.

    What common questions do patients ask about Dr. O'neill?

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

    What is Dr. Michael O'neill's specialty?

    Dr. O'neill is a Internist near Hartford, CT.

    A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

    Contact Dr. O'neill to book an appointment today.

    Is this Dr. Michael O'neill affiliated with a ranked Castle Connolly Top Hospital?

    Yes, Dr. O'neill is affiliated with St. Vincent's Medical Center - Bridgeport, Hartford 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

    Where can I learn more about Internist?

    Explore Internist with 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 Michael O'neill accepting new patients in Hartford, CT?

    Yes, Dr. Michael O'neill is accepting new patients at this time.

    Does Dr. Michael O'neill offer online booking?

    Please contact Dr. O'neill's office at (203) 384-3000 for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with Michael O'neill?

    Please contact Dr. O'neill's office at (203) 384-3000 for information regarding telehealth appointment availability or for scheduling assistance.

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