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Dr. Frederic Leong, MD

Thousand Oaks, CA

30 Years of Experience

Accepting patients

Affiliated with a Castle Connolly Top Hospital

    Who is Dr. Leong, Pediatric Cardiologist in Thousand Oaks, CA?

    Dr. Frederic Leong, MD is a Pediatric Cardiologist, who primarily practices in Thousand Oaks, CA with 2 additional practice locations. He has been practicing for over 30 years and is board certified by the American Board of Pediatrics. Dr. Leong completed his residency at Rhode Island Hosp-Lifespan, Pediatrics; St Elizabeth'S Med Ctr, Flexible Or Transitional Year. Dr. Leong is fluent in English and Spanish, and is currently seeing new patients. Dr. Leong’s practice accepts Kaiser Permanente, Medicaid, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Leong’s office at (805) 497-7214.

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

    • Residency: Rhode Island Hosp-Lifespan, Pediatrics; St Elizabeth'S Med Ctr, Flexible Or Transitional Year

    Is Dr. Leong board certified in Pediatric Cardiologist?

    Yes, Dr. Frederic Leong, MD is board certified by the American Board of Pediatrics

    What languages does Dr. Leong speak?

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

    • English

    • Spanish

    What conditions does Dr. Leong treat?

    As a Pediatric Cardiologist, Dr. Leong 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. Leong. 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:

    • Ventricular Septal Defect
    • Hole in the Heart (Atrial Septal Defect)
    • Patent Ductus Arteriosus
    • Atrial Septal Defect
    • Narrowing of the Aorta
    • Congenital Pulmonary Valve Stenosis
    • Tetralogy of Fallot
    • Congenital Heart Defects
    • Critical congenital heart disease
    • Heart Valve Disease
    • VSD
    • Hole in the Heart (Ventricles)
    • Congenital Heart Anomaly
    • ASD
    • Hole between Upper Heart Chambers
    • PDA
    • Open Ductus Arteriosus
    • Heart Connection Problem in Newborns
    • Hole in the Heart (Atria)
    • Aortic Coarctation
    • CoA
    • Pinched Aorta
    • Narrowed Pulmonary Valve at Birth
    • Pulmonary Valve Narrowing
    • Heart Valve Birth Defect
    • TOF
    • Blue Baby Syndrome
    • Complex Heart Defect

    ICD-10 Codes:

    • Q210: Ventricular septal defect
    • Q2110: Atrial septal defect, unspecified
    • Q250: Patent ductus arteriosus
    • Q211: Atrial septal defect
    • Q251: Coarctation of aorta
    • Q221: Congenital pulmonary valve stenosis
    • Q213: Tetralogy of Fallot

    Also known as:

    • Heart Murmur
    • Congenital Heart Defects
    • Heart Valve Disease
    • Cardiac murmur
    • Abnormal heart sound
    • Heart sound abnormality

    ICD-10 Codes:

    • R011: Cardiac murmur, unspecified

    Also known as:

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

    ICD-10 Codes:

    • R072: Precordial pain
    • R079: Chest pain, unspecified

    Also known as:

    • Fainting
    • Syncope
    • Passing out
    • Collapse

    ICD-10 Codes:

    • R55: Syncope and collapse

    Also known as:

    • Benign Heart Murmur
    • Congenital Heart Defects
    • Heart Valve Disease
    • Innocent heart murmur
    • Harmless heart murmur
    • Physiological heart murmur

    ICD-10 Codes:

    • R010: Benign and innocent cardiac murmurs

    Also known as:

    • Heart Palpitations
    • Arrhythmia
    • Skipped Heartbeat
    • Fluttering Heart
    • Pounding Heart

    ICD-10 Codes:

    • R002: Palpitations

    Also known as:

    • Type 2 Diabetes in Pregnancy
    • Diabetes and Pregnancy
    • Pregnancy if You Have Diabetes
    • Adult-Onset Diabetes in Pregnancy
    • Non-Insulin-Dependent Diabetes Pregnancy
    • Diabetes Mellitus Type 2 Pregnancy

    ICD-10 Codes:

    • O24112: Pre-existing type 2 diabetes mellitus, in pregnancy, second trimester

    Also known as:

    • Fetal Abnormality
    • Birth Defects
    • Health Problems in Pregnancy
    • Congenital Anomaly
    • Fetal Malformation
    • Developmental Abnormality
    • Birth Defect

    ICD-10 Codes:

    • O358XX0: Maternal care for other (suspected) fetal abnormality and damage, not applicable or unspecified

    Also known as:

    • Muscle Weakness
    • Muscle Disorder
    • Loss of strength
    • Fatigue
    • Muscle fatigue

    ICD-10 Codes:

    • R531: Weakness

    Also known as:

    • Shortness of Breath
    • Breathing Problems
    • Difficulty breathing
    • Breathlessness
    • Dyspnea

    ICD-10 Codes:

    • R0602: Shortness of breath

    Also known as:

    • Dizziness
    • Dizziness and Vertigo
    • Lightheadedness
    • Giddiness
    • Vertigo

    ICD-10 Codes:

    • R42: Dizziness and giddiness

    Also known as:

    • Fetal Genetic Disorder
    • Genetic Disorder
    • Health Problems in Pregnancy
    • Hereditary Condition in Fetus
    • Inherited Disease in Pregnancy
    • Fetal Genetic Condition

    ICD-10 Codes:

    • O352XX0: Maternal care for (suspected) hereditary disease in fetus, not applicable or unspecified

    Also known as:

    • Kawasaki disease
    • Kawasaki Disease
    • Mucocutaneous lymph node syndrome
    • Kawasaki syndrome
    • Infantile polyarteritis

    ICD-10 Codes:

    • M303: Mucocutaneous lymph node syndrome [Kawasaki]

    Which procedures does Dr. Leong perform as a Pediatric Cardiologist?

    As a Pediatric Cardiologist, procedures performed by a Dr. Frederic Leong may include:

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

    Does Dr. Leong accept my insurance?

    Dr. Leong accepts most major insurance plans. Important: Please call our office at (805) 497-7214 before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. Leong accept in Thousand Oaks, CA?

    Dr. Leong in Thousand Oaks, 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

    • Clinicas del Camino Real

    • Elevance Health Inc. (formerly Anthem)

    • Express Scripts

    • Gold Coast Health Plan

    • Medicaid

    • Other Health Care Provider

    • Ventura County Health Plan

    View All Insurances

    Where is Dr. Leong's office located?

    Dr. Frederic Leong's Primary Practice

    227 W Janss Rd Ste 205

    Thousand Oaks, CA 91360

    (805) 497-7214

    Get Directions

    Dr. Frederic Leong's Practice 2

    555 Marin St Ste 220

    Thousand Oaks, CA 91360

    (805) 497-7214

    Get Directions

    Dr. Frederic Leong's Practice 3

    300 Hillmont Ave

    Ventura, CA 93003

    Get Directions

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

    Dr. Leong's National Provider Identifier (NPI) number is 1598876070.

    What common questions do patients ask about Dr. Leong?

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

    What is Dr. Frederic Leong's specialty?

    Dr. Leong is a Pediatric Cardiologist near Thousand Oaks, CA. A pediatric cardiologist provides comprehensive care for children with cardiovascular issues, offering expertise in diagnosing, treating, and managing heart and blood vessel conditions. This specialist is skilled in selecting, performing, and interpreting structural and functional assessments of the heart and blood vessels, as well as conducting thorough clinical evaluations of cardiovascular diseases in young patients. Contact Dr. Leong to book an appointment today.

    Is this Dr. Frederic Leong affiliated with a ranked Castle Connolly Top Hospital?

    Yes, Dr. Leong is affiliated with Henry Mayo Newhall Hospital, Valley Presbyterian Hospital, Dignity Health - St. John's Regional Medical Center, Providence Saint Joseph 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 Pediatric Cardiologist?

    Explore Pediatric Cardiologist 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 Frederic Leong accepting new patients in Thousand Oaks, CA?

    Yes, Dr. Frederic Leong is accepting new patients at this time.

    Does Dr. Frederic Leong offer online booking?

    Please contact Dr. Leong's office at (805) 497-7214 for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with Frederic Leong?

    Please contact Dr. Leong's office at (805) 497-7214 for information regarding telehealth appointment availability or for scheduling assistance.

    Which board certifications does Dr. Frederic Leong have?

    Dr. Frederic Leong is certified by the American Board of Pediatrics.

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