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Dr. Stephen Yoon, MD

Fullerton, CA

21 Years of Experience

Accepting patients

Affiliated with a Castle Connolly Top Hospital

    Who is Dr. Yoon, Internist in Fullerton, CA?

    Dr. Stephen Yoon, MD is an Internist, who primarily practices in Fullerton, CA with 2 additional practice locations. He has been practicing for over 21 years and is board certified. Dr. Yoon completed his residency at Univ Of S Ca/Lac & Usc, Internal Medicine/Pediatrics. Dr. Yoon is fluent in English, Korean, and Spanish, and is currently seeing new patients. Dr. Yoon’s practice accepts Kaiser Permanente, Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Yoon’s office at (714) 447-5027.

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

    • Residency: Univ Of S Ca/Lac & Usc, Internal Medicine/Pediatrics

    • Medical School: Umdnj-New Jersey Med Sch- Newark Nj

    Is Dr. Yoon board certified as an Internist?

    Yes, Dr. Stephen Yoon, MD is board certified by the American Board of Internal Medicine , American Board of Pediatrics

    What languages does Dr. Yoon speak?

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

    • English

    • Korean

    • Spanish

    What conditions does an Internist like Dr. Yoon typically treat?

    As an Internist, Dr. Yoon 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. Yoon. 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:

    • Sepsis
    • Blood Poisoning
    • Septicemia
    • Systemic Bacterial Infection

    ICD-10 Codes:

    • A419: Sepsis, unspecified organism

    Also known as:

    • Chest Pain
    • Chest discomfort
    • Thoracic pain
    • Upper body pain

    ICD-10 Codes:

    • R079: Chest pain, unspecified

    Also known as:

    • Acute Kidney Failure
    • Kidney Failure
    • Acute Renal Failure
    • Sudden Kidney Failure

    ICD-10 Codes:

    • N179: Acute kidney failure, unspecified

    Also known as:

    • Acute Respiratory Failure with Low Oxygen
    • Respiratory Failure
    • Sudden lung failure with low oxygen
    • Hypoxic respiratory failure
    • Acute breathing failure with hypoxia

    ICD-10 Codes:

    • J9601: Acute respiratory failure with hypoxia

    Also known as:

    • Pneumonia
    • Lung Infection
    • Chest Infection
    • Pneumonitis

    ICD-10 Codes:

    • J189: Pneumonia, unspecified organism

    Also known as:

    • Ischemic Stroke
    • Brain Attack
    • Cerebral Infarction
    • Brain Ischemia

    ICD-10 Codes:

    • I639: Cerebral infarction, unspecified

    Also known as:

    • Fainting
    • Syncope
    • Passing out
    • Collapse

    ICD-10 Codes:

    • R55: Syncope and collapse

    What procedures does an Internist like Dr. Yoon typically perform?

    As an Internist, procedures performed by Dr. Stephen Yoon may include:

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

    Does Dr. Yoon accept my insurance?

    Dr. Yoon accepts most major insurance plans. Important: Please call our office at (714) 447-5027 before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. Yoon accept in Fullerton, CA?

    Dr. Yoon in Fullerton, CA 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 Corporation

    • Humana

    • Medicare

    • Molina Healthcare

    • Monarch HealthCare

    • Other Health Care Provider

    • State of California

    • UnitedHealth Group

    • Unknown

    View All Insurances

    Where is Dr. Yoon's office located?

    Dr. Stephen Yoon's Primary Practice

    101 E Valencia Mesa Dr

    Fullerton, CA 92835

    (714) 447-5027

    Get Directions

    Dr. Stephen Yoon's Practice 2

    1100 W Stewart Dr

    Orange, CA 92868

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    Dr. Stephen Yoon's Practice 3

    27700 Medical Center Rd

    Mission Viejo, CA 92691

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

    Dr. Yoon's National Provider Identifier (NPI) number is 1851327100.

    What common questions do patients ask about Dr. Yoon?

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

    What is Dr. Stephen Yoon's specialty?

    Dr. Yoon is a Internist near Fullerton, CA.

    What does an Internist do?

    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.

    Is this Dr. Stephen Yoon affiliated with a ranked Castle Connolly Top Hospital?

    Yes, Dr. Yoon is affiliated with Providence St. Jude Medical Center, Providence St. Jude Medical Center, Ahmc Anaheim Regional Medical Center, Uci Medical Center, Kaiser Permanente Baldwin Park Medical Center 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 an Internist?: Guides for symptoms, conditions, and treatments

    Understand your symptoms and know when it’s time to see an Internist. 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 Stephen Yoon accepting new patients in Fullerton, CA?

    Yes, Dr. Stephen Yoon is accepting new patients at this time.

    Does Dr. Stephen Yoon offer online booking?

    Please contact Dr. Yoon's office at (714) 447-5027 for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with Stephen Yoon?

    Please contact Dr. Yoon's office at (714) 447-5027 for information regarding telehealth appointment availability or for scheduling assistance.

    Which board certifications does Dr. Stephen Yoon have?

    Dr. Stephen Yoon is certified by the American Board of Internal Medicine and American Board of Pediatrics.

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