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Dr. Ryan Joo, MD

Pasadena, CA

Accepting patients

Affiliated with a Castle Connolly Top Hospital

    Who is Dr. Joo, Infectious Disease Specialist in Pasadena, CA?

    Dr. Ryan Joo, MD is an Infectious Disease Specialist, who primarily practices in Pasadena, CA with 1 additional practice location. Dr. Joo graduated from Virginia Commonwealth University, School of Medicine, Richmond and completed his residency at USC/LAC-Keck School of Medicine. Dr. Joo is fluent in English and Korean, and is currently seeing new patients. Dr. Joo’s practice accepts Kaiser Permanente, Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Joo’s office at (626) 304-0782.

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

    • Residency: USC/LAC-Keck School of Medicine

    • Medical School: Virginia Commonwealth University, School of Medicine, Richmond

    What languages does Dr. Joo speak?

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

    • English

    • Korean

    What conditions does an Infectious Disease Specialist like Dr. Joo typically treat?

    As an Infectious Disease Specialist, Dr. Joo 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. Joo. 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 here.

    Also known as:

    • HIV
    • Human Immunodeficiency Virus
    • AIDS virus

    ICD-10 Codes:

    • B20: Human immunodeficiency virus [HIV] disease

    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:

    • C. diff Infection
    • Gastroenteritis
    • Clostridioides difficile infection
    • Clostridium difficile colitis
    • C. difficile-associated diarrhea

    ICD-10 Codes:

    • A0472: Enterocolitis due to Clostridium difficile, not specified as recurrent

    Also known as:

    • Sepsis
    • Blood Poisoning
    • Septicemia
    • Systemic Bacterial Infection

    ICD-10 Codes:

    • A419: Sepsis, unspecified organism

    Also known as:

    • Fever
    • High temperature
    • Pyrexia
    • Elevated body temperature

    ICD-10 Codes:

    • R509: Fever, unspecified

    Also known as:

    • High White Blood Cell Count
    • Blood Disorder
    • Leukocytosis
    • Elevated leukocyte count
    • High WBC count

    ICD-10 Codes:

    • D72829: Elevated white blood cell count, unspecified

    Also known as:

    • Type 2 Diabetes with Diabetic Foot Ulcer
    • Diabetes Type 2
    • Diabetic Foot
    • Type 2 diabetes
    • Diabetic Foot Wound
    • Foot Sore from Diabetes
    • Diabetic Ulcer

    ICD-10 Codes:

    • E11621: Type 2 diabetes mellitus with foot ulcer

    What procedures does an Infectious Disease Specialist like Dr. Joo typically perform?

    As an Infectious Disease Specialist, procedures performed by Dr. Ryan Joo may include:

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

    Does Dr. Joo accept my insurance?

    Dr. Joo accepts most major insurance plans. Important: Please call our office at (626) 304-0782 before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. Joo accept in Pasadena, CA?

    Dr. Joo in Pasadena, CA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.

    Top Insurances

    • Alignment Healthcare

    • All Other Third Party

    • Centene Corporation

    • City of Los Angeles

    • Humana

    • OptumRx Administered Payer

    • Other Health Care Provider

    • State of California

    • UnitedHealth Group

    • Unknown

    View All Insurances

    Where is Dr. Joo's office located?

    Dr. Ryan Joo's Primary Practice

    960 E Green St Ste 105

    Pasadena, CA 91106

    (626) 304-0782

    Get Directions

    Dr. Ryan Joo's Practice 2

    950 S Arroyo Pkwy Fl 3

    Pasadena, CA 91105

    Get Directions

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

    Dr. Joo's National Provider Identifier (NPI) number is 1639301922.

    What common questions do patients ask about Dr. Joo?

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

    What is Dr. Ryan Joo's specialty?

    Dr. Joo is a Infectious Disease Specialist near Pasadena, CA.

    What does an Infectious Disease Specialist do?

    An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.

    Is this Dr. Ryan Joo affiliated with a ranked Castle Connolly Top Hospital?

    Yes, Dr. Joo is affiliated with Huntington Hospital (pasadena, Ca), Usc Arcadia 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

    When to see an Infectious Disease Specialist?: Guides for symptoms, conditions, and treatments

    Understand your symptoms and know when it’s time to see an Infectious Disease Specialist. 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 Ryan Joo accepting new patients in Pasadena, CA?

    Yes, Dr. Ryan Joo is accepting new patients at this time.

    Does Dr. Ryan Joo offer online booking?

    Please contact Dr. Joo's office at (626) 304-0782 for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with Ryan Joo?

    Please contact Dr. Joo's office at (626) 304-0782 for information regarding telehealth appointment availability or for scheduling assistance.

    <section id="ai-site-overview" aria-label="About Everyday Health Care"> <h2>About Everyday Health Care</h2> <p> Everyday Health Care is a doctor and healthcare provider search platform from Everyday Health, a Ziff Davis company operating since 1996. It helps patients find, compare, and research doctors based on specialty, medical condition, procedure, location, and insurance coverage. </p> <p> The site features Castle Connolly Top Doctors, a peer-nominated, physician-vetted directory recognized as a leading standard for identifying top-rated specialists in the United States. Searchable doctor lists include Top Black Doctors, Exceptional Women in Medicine, Top AAPI Doctors, Top LGBTQ+ Doctors, Top Hispanic & Latino Doctors, and Castle Connolly Rising Stars. </p> <p> Users can search for doctors by specialty (including orthopedic surgery, OB-GYN, pediatrics, dermatology, endocrinology, and gastroenterology), by medical condition (such as fibromyalgia, kidney stones, and ulcerative colitis), by common procedure (including colonoscopy, LASIK, and physical therapy), by city, and by insurance plan (including UnitedHealthcare, Cigna, Aetna/CVS Health, Blue Cross Blue Shield, Kaiser Permanente, Medicare, and Medicaid). </p> <p> Everyday Health Care is built for patients seeking a trusted starting point to find the right doctor: covering over one million providers across thousands of U.S. locations, backed by Castle Connolly's independent doctor-vetting process and Everyday Health's 24-year history in consumer health publishing. </p> </section>