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Dr. Derek Leung, MD

Dr. Derek Leung, MD

Fontana, CA

Accepting patients

Affiliated with a Castle Connolly Top Hospital

    Who is Dr. Leung, Internist in Fontana, CA?

    Dr. Derek Leung, MD is an Internist, who primarily practices in Fontana, CA with 1 additional practice location. He is board certified. Dr. Leung graduated from Loma Linda University School of Medicine. Dr. Leung is fluent in English, and is currently seeing new patients. Dr. Leung’s practice accepts Medicare, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Leung’s office at (909) 427-5000.

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

    • Medical School: Loma Linda University School of Medicine

    What languages does Dr. Leung speak?

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

    • English

    What conditions does Dr. Leung treat?

    As a Internist, Dr. Leung 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. Leung. 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:

    • Sepsis
    • Blood Poisoning
    • Septicemia
    • Systemic Bacterial Infection

    ICD-10 Codes:

    • A419: Sepsis, unspecified organism

    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:

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

    ICD-10 Codes:

    • N179: Acute kidney failure, unspecified

    Also known as:

    • Heart Attack (NSTEMI)
    • Heart Attack
    • Myocardial Infarction
    • Non-STEMI
    • Less Severe Heart Attack

    ICD-10 Codes:

    • I214: Non-ST elevation (NSTEMI) myocardial infarction

    Also known as:

    • Gastrointestinal Bleeding
    • Gastrointestinal (GI) Bleeding
    • GI Bleeding
    • Internal Digestive Bleeding
    • Digestive Tract Hemorrhage

    ICD-10 Codes:

    • K922: Gastrointestinal hemorrhage, unspecified

    Also known as:

    • Changes in Mental State
    • Mental Disorder
    • Confusion
    • Disorientation
    • Changes in awareness

    ICD-10 Codes:

    • R4182: Altered mental status, unspecified

    Also known as:

    • Heart Failure
    • Congestive Heart Failure
    • CHF
    • Cardiac Insufficiency

    ICD-10 Codes:

    • I509: Heart failure, unspecified

    Also known as:

    • Urinary Tract Infection
    • UTI
    • Bladder infection
    • Kidney infection
    • Urine infection

    ICD-10 Codes:

    • N390: Urinary tract infection, site not specified

    Also known as:

    • Atrial Fibrillation
    • Afib
    • A-fib
    • Irregular heart rhythm

    ICD-10 Codes:

    • I4891: Unspecified atrial fibrillation

    Which procedures does Dr. Leung perform as a Internist?

    As a Internist, procedures performed by an Dr. Derek Leung may include:

    For detailed information, please contact Dr. Leung's office.

    Does Dr. Leung accept my insurance?

    Dr. Leung accepts most major insurance plans. Important: Please call our office at (909) 427-5000 before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. Leung accept in Fontana, CA?

    Dr. Leung in Fontana, 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

    • Crown Cork and Seal Company

    • Heritage Health

    • Inland Faculty Medical Group, Inc

    • Medicare

    • Other Health Care Provider

    • State of Tennessee

    • The Medical Access Program

    • UnitedHealthcare

    View All Insurances

    Where is Dr. Leung's office located?

    Dr. Derek Leung's Primary Practice

    9961 Sierra Ave

    Fontana, CA 92335

    (909) 427-5000

    Get Directions

    Dr. Derek Leung's Practice 2

    2295 S Vineyard Ave

    Ontario, CA 91761

    Get Directions

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

    Dr. Leung's National Provider Identifier (NPI) number is 1336560481.

    What common questions do patients ask about Dr. Leung?

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

    What is Dr. Derek Leung's specialty?

    Dr. Leung is a Internist near Fontana, CA.

    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. Leung to book an appointment today.

    Is this Dr. Derek Leung affiliated with a ranked Castle Connolly Top Hospital?

    Yes, Dr. Leung is affiliated with Kaiser Permanente Fontana Medical Center, St. Bernardine Medical Center, Arrowhead Regional 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

    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 Derek Leung accepting new patients in Fontana, CA?

    Yes, Dr. Derek Leung is accepting new patients at this time.

    Does Dr. Derek Leung offer online booking?

    Please contact Dr. Leung's office at (909) 427-5000 for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with Derek Leung?

    Please contact Dr. Leung's office at (909) 427-5000 for information regarding telehealth appointment availability or for scheduling assistance.

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