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Dr. Karthikeyan Viswanathan, DO

Arcata, CA

Accepting patients
Telehealth

    Who is Dr. Viswanathan, Internist in Arcata, CA?

    Dr. Karthikeyan Viswanathan, DO is an Internist, who primarily practices in Arcata, CA with 2 additional practice locations. Dr. Viswanathan is fluent in English and Hindi, and is currently seeing new patients. To book an appointment or to confirm insurance options, please call Dr. Viswanathan’s office at (707) 825-5000.

    What languages does Dr. Viswanathan speak?

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

    • English

    • Hindi

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

    As an Internist, Dr. Viswanathan 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. Viswanathan. 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:

    • Malaise
    • Fatigue
    • General discomfort
    • Feeling unwell
    • Unease

    ICD-10 Codes:

    • R5381: Other malaise

    Also known as:

    • Opioid Abuse
    • Opioids and Opioid Use Disorder (OUD)
    • Prescription Drug Misuse
    • Opioid misuse
    • Drug abuse (opioids)
    • Problem opioid use

    ICD-10 Codes:

    • F1110: Opioid abuse, uncomplicated

    Also known as:

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

    ICD-10 Codes:

    • I10: Essential (primary) hypertension

    Also known as:

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

    ICD-10 Codes:

    • R300: Dysuria

    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:

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

    ICD-10 Codes:

    • Z23: Encounter for immunization

    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:

    • 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:

    • Diabetes Screening
    • Health Screening
    • Blood Sugar Test
    • Diabetes Mellitus Screening
    • Glucose Screening

    ICD-10 Codes:

    • Z131: Encounter for screening for diabetes mellitus

    Also known as:

    • Skin Rash
    • Rashes
    • Skin Eruption
    • Hives
    • Dermatitis
    • Skin Inflammation

    ICD-10 Codes:

    • R21: Rash and other nonspecific skin eruption

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

    As an Internist, procedures performed by Dr. Karthikeyan Viswanathan may include:

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

    Does Dr. Viswanathan accept my insurance?

    Dr. Viswanathan accepts most major insurance plans. Important: Please call our office at (707) 825-5000 before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. Viswanathan accept in Arcata, CA?

    Dr. Viswanathan in Arcata, 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

    • CVS Health (formerly Aetna)

    • Unknown

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    Where is Dr. Viswanathan's office located?

    Dr. Karthikeyan Viswanathan also offers virtual visits

    Dr. Karthikeyan Viswanathan's Primary Practice

    1600 Weeot Way

    Arcata, CA 95521

    (707) 825-5000

    Get Directions

    Dr. Karthikeyan Viswanathan's Practice 2

    1675 Northcrest Dr

    Crescent City, CA 95531

    Get Directions

    Dr. Karthikeyan Viswanathan's Practice 3

    930 S Fortuna Blvd

    Fortuna, CA 95540

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

    Dr. Viswanathan's National Provider Identifier (NPI) number is 1396128336.

    What common questions do patients ask about Dr. Viswanathan?

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

    What is Dr. Karthikeyan Viswanathan's specialty?

    Dr. Viswanathan is a Internist near Arcata, 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. Karthikeyan Viswanathan affiliated with a ranked Castle Connolly Top Hospital?

    No, Viswanathan is not affiliated with a Castle Connolly Top Hospital. Castle Connolly Top Hospitals 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 Karthikeyan Viswanathan accepting new patients in Arcata, CA?

    Yes, Dr. Karthikeyan Viswanathan is accepting new patients at this time.

    Does Dr. Karthikeyan Viswanathan offer online booking?

    Please contact Dr. Viswanathan's office at (707) 825-5000 for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with Karthikeyan Viswanathan?

    Please contact Dr. Viswanathan's office at (707) 825-5000 for information regarding telehealth appointment availability or for scheduling assistance.

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