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Dr. Sean To, MD

Rancho Cucamonga, CA

Accepting patients

Affiliated with a Castle Connolly Top Hospital

    Who is Dr. To, Internist in Rancho Cucamonga, CA?

    Dr. Sean To, MD is an Internist, who primarily practices in Rancho Cucamonga, CA with 1 additional practice location. He is board certified. Dr. To is fluent in English and Vietnamese, and is currently seeing new patients. Dr. To’s practice accepts Cigna, Kaiser Permanente, Medicaid, Medicare, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. To’s office at (909) 981-6644.

    What languages does Dr. To speak?

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

    • English

    • Vietnamese

    What conditions does Dr. To treat?

    As a Internist, Dr. To 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. To. 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:

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

    ICD-10 Codes:

    • I10: Essential (primary) hypertension

    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 Cholesterol
    • Cholesterol
    • Triglycerides
    • Hyperlipidemia
    • High lipids
    • Dyslipidemia

    ICD-10 Codes:

    • E785: Hyperlipidemia, unspecified

    Also known as:

    • Type 2 Diabetes with High Blood Sugar
    • Type 2 Diabetes with Chronic Kidney Disease
    • Diabetes Complicationss
    • Diabetes Type 2
    • Type 2 diabetes
    • Hyperglycemia
    • Diabetic Kidney Problems
    • Diabetes Mellitus Complications
    • Diabetes Related Health Problems
    • Advanced Diabetes
    • Diabetic Hyperglycemia
    • High Blood Glucose
    • High Sugar Levels
    • Diabetic Chronic Kidney Disease
    • Long-term Kidney Failure from Type 2 Diabetes
    • Type 2 Diabetes End-Stage Renal Disease

    ICD-10 Codes:

    • E1169: Type 2 diabetes mellitus with other specified complication
    • E1165: Type 2 diabetes mellitus with hyperglycemia
    • E1122: Type 2 diabetes mellitus with diabetic chronic kidney disease

    Also known as:

    • Chronic Kidney Disease from High Blood Pressure
    • Chronic Kidney Disease
    • High Blood Pressure
    • Hypertensive Chronic Kidney Disease
    • High Blood Pressure Kidney Disease
    • Hypertension-Related Kidney Disease

    ICD-10 Codes:

    • I129: Hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease

    Also known as:

    • Hypothyroidism
    • Congenital hypothyroidism
    • Hypothyroidism (Underactive Thyroid)
    • Underactive Thyroid
    • Low Thyroid Function

    ICD-10 Codes:

    • E039: Hypothyroidism, 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:

    • Mixed High Cholesterol and Triglycerides
    • Cholesterol
    • Triglycerides
    • Mixed hyperlipidemia
    • Combined hyperlipidemia
    • High lipids

    ICD-10 Codes:

    • E782: Mixed hyperlipidemia

    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:

    • Immune System Disorder
    • Immune System and Disorder
    • Immunodeficiency
    • Immune System Problems
    • Weakened Immune System

    ICD-10 Codes:

    • D8481: Immunodeficiency due to conditions classified elsewhere

    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:

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

    ICD-10 Codes:

    • U071: COVID-19

    Also known as:

    • Elevated Blood Pressure
    • High Blood Pressure
    • High Blood Pressure Reading
    • Prehypertension
    • Borderline High Blood Pressure

    ICD-10 Codes:

    • R030: Elevated blood-pressure reading, without diagnosis of hypertension

    Also known as:

    • Acid Reflux
    • GERD
    • Acid Reflux (GER & GERD) in Adults
    • Acid Reflux (GER & GERD) in Children
    • Acid Reflux (GER & GERD) in Infants
    • Gastroesophageal Reflux
    • Heartburn
    • Indigestion

    ICD-10 Codes:

    • K219: Gastro-esophageal reflux disease without esophagitis

    Also known as:

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

    ICD-10 Codes:

    • J209: Acute bronchitis, unspecified

    Also known as:

    • High Blood Pressure Heart and Kidney Disease
    • Chronic Kidney Disease
    • High Blood Pressure
    • Hypertensive Cardiorenal Disease
    • Heart and Kidney Problems from High Blood Pressure

    ICD-10 Codes:

    • I1310: Hypertensive heart and chronic kidney disease without heart failure, with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease

    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:

    • Low Back Pain
    • Back Pain
    • Lumbago
    • Lower Back Ache
    • Chronic Low Back Pain

    ICD-10 Codes:

    • M5459: Other low back pain

    Which procedures does Dr. To perform as a Internist?

    As a Internist, procedures performed by an Dr. Sean To may include:

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

    Does Dr. To accept my insurance?

    Dr. To accepts most major insurance plans. Important: Please call our office at (909) 981-6644 before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. To accept in Rancho Cucamonga, CA?

    Dr. To in Rancho Cucamonga, 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

    • Blue Shield of California

    • Centene

    • CVS Health (formerly Aetna)

    • Elevance Health Inc. (formerly Anthem)

    • Inland Empire

    • Medicare

    • OptumRx

    • Scan Health Plan

    • UnitedHealthcare

    View All Insurances

    Where is Dr. To's office located?

    Dr. Sean To's Primary Practice

    8283 Grove Ave Ste 201

    Rancho Cucamonga, CA 91730

    (909) 981-6644

    Get Directions

    Dr. Sean To's Practice 2

    5562 Philadelphia St Ste 201

    Chino, CA 91710

    Get Directions

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

    Dr. To's National Provider Identifier (NPI) number is 1922163310.

    What common questions do patients ask about Dr. To?

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

    What is Dr. Sean To's specialty?

    Dr. To is a Internist near Rancho Cucamonga, 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. To to book an appointment today.

    Is this Dr. Sean To affiliated with a ranked Castle Connolly Top Hospital?

    Yes, Dr. To is affiliated with San Antonio Regional Hospital, Casa Colina Hospital And Centers For Healthcare, City Of Hope - Duarte Cancer 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 Sean To accepting new patients in Rancho Cucamonga, CA?

    Yes, Dr. Sean To is accepting new patients at this time.

    Does Dr. Sean To offer online booking?

    Please contact Dr. To's office at (909) 981-6644 for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with Sean To?

    Please contact Dr. To's office at (909) 981-6644 for information regarding telehealth appointment availability or for scheduling assistance.

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