The 20 Best RASopathies Doctors Near Me in Fontana, CA

Find the Top RASopathies Experts and Specialists

Last Updated: 04/28/2026

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MediFind found 44 doctor with experience in RASopathies near Fontana, CA. Of these, 44 are Experienced.

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44 providers found
    Experienced in RASopathies
    Pediatric Endocrinology
    Experienced in RASopathies
    Pediatric Endocrinology

    Kaiser Permanente Fontana

    9985 Sierra Ave, 
    Fontana, CA 
     (1.3 miles away)
    Languages Spoken:
    English

    Maria Lin is a Pediatric Endocrinologist practicing medicine in Fontana, California. Dr. Lin is rated as an Experienced provider by MediFind in the treatment of RASopathies. She is also highly rated in 2 other conditions, according to our data. Her clinical expertise encompasses Type 1 Diabetes (T1D), Newborn Jaundice, Adrenal Insufficiency Pediatric, and Short Stature (Growth Disorders).

    Experienced in RASopathies
    Radiology | General Surgery
    Experienced in RASopathies
    Radiology | General Surgery

    Fontana Medical Center

    9961 Sierra Ave, 
    Fontana, CA 
     (1.3 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Ching-long Ni is a Radiologist and a General Surgeon practicing medicine in Fontana, California. Dr. Ni is rated as an Experienced provider by MediFind in the treatment of RASopathies. He is also highly rated in 42 other conditions, according to our data. His clinical expertise encompasses Neonatal Ovarian Cyst, Scoliosis, Fractured Spine, and Tenosynovitis. Dr. Ni is currently accepting new patients.

    Experienced in RASopathies
    Internal Medicine
    Experienced in RASopathies
    Internal Medicine

    United Family Care

    8110 Mango Ave, 
    Fontana, CA 
     (0.9 miles away)
    Languages Spoken:
    English

    Nasser Liasi is a primary care provider, practicing in Internal Medicine in Fontana, California. Dr. Liasi is rated as an Experienced provider by MediFind in the treatment of RASopathies. He is also highly rated in 10 other conditions, according to our data. His clinical expertise encompasses Type 2 Diabetes (T2D), Osteomyelitis in Children, Hypertension, and Familial Hypertension.

    Are you looking for a specific type of RASopathies?

    Common conditions include: Cardiofaciocutaneous Syndrome, Cardiomyopathic Lentiginosis, Costello Syndrome, Legius Syndrome, Noonan Syndrome

    Learn about our expert tiers
    Experienced in RASopathies
    Pediatric Pulmonology
    Experienced in RASopathies
    Pediatric Pulmonology

    Kaiser Permanente Fontana

    9985 Sierra Ave, 
    Fontana, CA 
     (1.3 miles away)
    Languages Spoken:
    English

    Kyle Mccallin is a Pediatric Pulmonologist practicing medicine in Fontana, California. Dr. Mccallin is rated as an Experienced provider by MediFind in the treatment of RASopathies. His clinical expertise encompasses Ciliary Dyskinesia-Bronchiectasis, Kartagener Syndrome, Primary Ciliary Dyskinesia (PCD), and Asthma in Children.

    Experienced in RASopathies
    Neurology
    Experienced in RASopathies
    Neurology

    Kaiser Permanente Fontana

    9985 Sierra Ave, 
    Fontana, CA 
     (1.3 miles away)
    Languages Spoken:
    English

    Kian-ti Yu is a Neurologist practicing medicine in Fontana, California. Dr. Yu is rated as an Experienced provider by MediFind in the treatment of RASopathies. He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses Epilepsy, Seizures, Memory Loss, and Autism Spectrum Disorder.

    Experienced in RASopathies
    Pediatric Gastroenterology
    Experienced in RASopathies
    Pediatric Gastroenterology

    Kaiser Permanente Fontana Medical Center

    9961 Sierra Ave, 
    Fontana, CA 
     (1.3 miles away)
    Languages Spoken:
    English

    Mun-wah Ng is a Pediatric Gastroenterologist practicing medicine in Fontana, California. Dr. Ng is rated as an Experienced provider by MediFind in the treatment of RASopathies. He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses Cardiofaciocutaneous Syndrome, Fecal Impaction, RASopathies, and Encopresis.

    Experienced in RASopathies
    Experienced in RASopathies

    Kaiser Permanente Fontana Medical Center - Pediatrics Department

    9961 Sierra Ave, 
    Fontana, CA 
     (1.3 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Eugene Hwang is a Cardiologist practicing medicine in Fontana, California. Dr. Hwang is rated as an Experienced provider by MediFind in the treatment of RASopathies. He is also highly rated in 6 other conditions, according to our data. His clinical expertise encompasses Ventricular Septal Defects, Heart Murmurs, Patent Ductus Arteriosus, and Wolff-Parkinson-White Syndrome. Dr. Hwang is currently accepting new patients.

    Experienced in RASopathies
    General Surgery
    Experienced in RASopathies
    General Surgery

    Kaiser Permanente Fontana Medical Center

    9961 Sierra Ave, 
    Fontana, CA 
     (1.3 miles away)
    Languages Spoken:
    English

    Renee Park is a General Surgeon practicing medicine in Fontana, California. Dr. Park is rated as an Experienced provider by MediFind in the treatment of RASopathies. She is also highly rated in 9 other conditions, according to our data. Her clinical expertise encompasses Acrodysostosis, Acrofacial Dysostosis Nager Type, Acrofacial Dysostosis Weyers Type, Adenoidectomy, and Myringotomy.

    Experienced in RASopathies
    Experienced in RASopathies

    Kaiser Permanente Fontana Medical Center

    9961 Sierra Ave, 
    Fontana, CA 
     (1.3 miles away)
    Languages Spoken:
    English

    Alison Nguyen is a Pediatrics provider practicing medicine in Fontana, California. Dr. Nguyen is rated as an Experienced provider by MediFind in the treatment of RASopathies. She is also highly rated in 2 other conditions, according to our data. Her clinical expertise encompasses Otitis Media with Effusion, Chromosome 13q Duplication, Obesity in Children, and Asthma in Children.

    Experienced in RASopathies
    Dermatology
    Experienced in RASopathies
    Dermatology
    7365 Carnelian St # 137, 
    Rancho Cucamonga, CA 
     (8.2 miles away)
    Languages Spoken:
    English

    Jack Griffith is a Dermatologist practicing medicine in Rancho Cucamonga, California. Dr. Griffith is rated as an Experienced provider by MediFind in the treatment of RASopathies. He is also highly rated in 12 other conditions, according to our data. His clinical expertise encompasses Comedones, Squamous Cell Skin Carcinoma, Contact Dermatitis, and Autoerythrocyte Sensitivity.

    Experienced in RASopathies
    Experienced in RASopathies
    9190 Haven Ave # 210, 
    Rancho Cucamonga, CA 
     (8.2 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Johnnie Woodson is a Dermatologist practicing medicine in Rancho Cucamonga, California. Dr. Woodson is rated as an Experienced provider by MediFind in the treatment of RASopathies. He is also highly rated in 53 other conditions, according to our data. His clinical expertise encompasses Melasma, Membranous Nephropathy, Stiff Skin Syndrome, and Nakajo-Nishimura Syndrome.

    Experienced in RASopathies
    Dermatology
    Experienced in RASopathies
    Dermatology
    4336 Market St, 
    Riverside, CA 
     (8.6 miles away)
    Languages Spoken:
    English

    Ethan Nguyen is a Dermatologist practicing medicine in Riverside, California. Dr. Nguyen is rated as an Experienced provider by MediFind in the treatment of RASopathies. He is also highly rated in 3 other conditions, according to our data. His clinical expertise encompasses Eschar, Malignant Hypertension, Female Pattern Baldness, and Actinic Keratosis.

    Experienced in RASopathies
    Experienced in RASopathies

    The Neurology Group, Inc.

    8221 Rochester Ave, 
    Rancho Cucamonga, CA 
     (6.2 miles away)
    Experience:
    49+ years
    Languages Spoken:
    English

    Mukhtair Kundi is a Neurologist practicing medicine in Rancho Cucamonga, California. He has been practicing medicine for over 49 years. Dr. Kundi is rated as an Experienced provider by MediFind in the treatment of RASopathies. He is also highly rated in 37 other conditions, according to our data. His clinical expertise encompasses Susac Syndrome, Generalized Tonic-Clonic Seizure, Athetosis, and Seizures. Dr. Kundi is board certified in American Board Of Psychiatry And Neurology.

    Experienced in RASopathies
    Experienced in RASopathies

    CCARE

    4500 Brockton Ave Ste 316, 
    Riverside, CA 
     (7.6 miles away)
    Languages Spoken:
    English

    Martin Majer is an Oncologist practicing medicine in Riverside, California. Dr. Majer is rated as an Experienced provider by MediFind in the treatment of RASopathies. He is also highly rated in 44 other conditions, according to our data. His clinical expertise encompasses Inflammatory Breast Cancer, Angiosarcoma, Familial Colorectal Cancer, Paget Disease of the Breast, and Bone Marrow Aspiration.

    Experienced in RASopathies
    Experienced in RASopathies

    Riverside Medical Clinic

    6250 Clay St, 
    Riverside, CA 
     (8.3 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Naheed Aljilani is a Pediatrics provider practicing medicine in Riverside, California. Dr. Aljilani is rated as an Experienced provider by MediFind in the treatment of RASopathies. She is also highly rated in 1 other condition, according to our data. Her clinical expertise encompasses Obesity in Children, Delayed Growth, Autism Spectrum Disorder, and Zoon Vulvitis. Dr. Aljilani is currently accepting new patients.

    Experienced in RASopathies
    Ophthalmology
    Experienced in RASopathies
    Ophthalmology

    Faculty Physicians And Surgeons Of Llusm

    2195 Club Ctr Dr, 
    San Bernardino, CA 
     (9.1 miles away)
    Languages Spoken:
    English

    Leila Khazaeni is an Ophthalmologist practicing medicine in San Bernardino, California. Dr. Khazaeni is rated as an Experienced provider by MediFind in the treatment of RASopathies. She is also highly rated in 3 other conditions, according to our data. Her clinical expertise encompasses Strabismus, Amblyopia, Esotropia, and Baller-Gerold Syndrome. Dr. Khazaeni is board certified in Ophthalmology.

    Experienced in RASopathies
    Pediatric Neurology
    Experienced in RASopathies
    Pediatric Neurology

    Faculty Physicians And Surgeons Of Llusm

    250 E Caroline St Ste J, 
    San Bernardino, CA 
     (9.5 miles away)
    Languages Spoken:
    English

    Stanford Shu is a Pediatric Neurologist practicing medicine in San Bernardino, California. Dr. Shu is rated as an Experienced provider by MediFind in the treatment of RASopathies. He is also highly rated in 7 other conditions, according to our data. His clinical expertise encompasses Neurofibromatosis Type 1 (NF1), Neurofibromatosis, Seizures, and Autism Spectrum Disorder.

    Experienced in RASopathies
    Pain Medicine
    Experienced in RASopathies
    Pain Medicine

    Office

    1850 E Washington St Ste C, 
    Colton, CA 
     (9.6 miles away)
    Languages Spoken:
    English

    Andrew Hesseltine is a Pain Medicine provider practicing medicine in Colton, California. Dr. Hesseltine is rated as an Experienced provider by MediFind in the treatment of RASopathies. He is also highly rated in 6 other conditions, according to our data. His clinical expertise encompasses Invertebral Disc Disease, Spinal Stenosis, Cervical Spondylosis, and Complex Regional Pain Syndrome.

    Experienced in RASopathies
    Experienced in RASopathies

    Loma Linda Univ Anesthesiology Medical Group Inc

    11234 Anderson St, 
    Loma Linda, CA 
     (10.2 miles away)
    Languages Spoken:
    English

    Nathaniel Dan Wycliffe is a Pediatrics provider practicing medicine in Loma Linda, California. Dr. Dan Wycliffe is rated as an Experienced provider by MediFind in the treatment of RASopathies. He is also highly rated in 17 other conditions, according to our data. His clinical expertise encompasses Hepatocerebral Degeneration, X-Linked Intellectual Disability, Siderius Type, PEHO Syndrome, and Mohr-Tranebjaerg Syndrome.

    Experienced in RASopathies
    Neuroradiology
    Experienced in RASopathies
    Neuroradiology

    Loma Linda Univ Anesthesiology Medical Group Inc

    11234 Anderson St, 
    Loma Linda, CA 
     (10.2 miles away)
    Languages Spoken:
    English

    Eric Peters is a Neuroradiologist practicing medicine in Loma Linda, California. Dr. Peters is rated as an Experienced provider by MediFind in the treatment of RASopathies. He is also highly rated in 27 other conditions, according to our data. His clinical expertise encompasses X-Linked Intellectual Disability, Siderius Type, Aicardi-Goutieres Syndrome, Mohr-Tranebjaerg Syndrome, and PEHO Syndrome.

    Showing 1-20 of 44

    Last Updated: 04/28/2026

    What is the definition of RASopathies?

    RASopathies are a group of rare syndromes causes by mutations in the genes that make proteins for the Ras/MAPK cell signaling pathway. This pathway controls cell functions such as cell growth, cell maturation, and cell death. There are several types of RASopathy syndromes, including cardiofaciocutaneous syndrome, Costello syndrome, Legius syndrome, neurofibromatosis type 1, Noonan syndrome, and capillary malformation-arteriovenous malformation syndrome.

    When should I see a RASopathies doctor near Fontana, CA?

    There are various reasons why you may want to see a specialist, such as: 

    • Your primary care provider recommends it. 
    • Your condition requires expert knowledge and specialized care. 
    • Your symptoms persist or worsen despite treatment. 
    • You need specialized testing or procedures. 
    • You want a second opinion.  

    What should I consider when choosing a RASopathies doctor near Fontana, CA?

    It’s important to see a provider with expertise in your specific condition. Each provider profile in MediFind’s doctor database includes information on which conditions they treat, years of experience, research contributions, languages spoken, insurance plans accepted, and more.  

    How does MediFind rank RASopathies doctors near Fontana, CA?

    MediFind’s rankings are based on a variety of data sources, such as the number of articles a doctor has published in medical journals, participation in clinical trials and industry conferences, as well as the number of patients that provider sees for a given condition. Note that MediFind’s provider database is not based on user reviews, and providers do not pay to be included in the database. 

    What types of insurance are accepted by RASopathies doctors near Fontana, CA?

    Most profiles in MediFind’s doctor database include a list of insurance plans accepted by that provider. However, it’s a good idea to contact the provider’s office to make sure they still accept your insurance, then doublecheck by contacting your insurance plan to confirm they’re in network. 

    How can I book an appointment online with a RASopathies doctor near Fontana, CA?

    MediFind offers direct scheduling for certain providers using the “Request Appointment” button on that provider’s profile. If the schedule option is not available for a provider, tap the red “Show Phone Number” button on their profile to get their contact information. If you prefer to find providers who offer online scheduling, select “Schedules online” under the “Availability” category of the filter feature on the left side of the RASopathies doctor search results page. 

    Why is it important to get a second opinion from a different RASopathies doctor?

    Second opinions are an opportunity to confirm a diagnosis and its root cause, learn about alternative treatment options, or simply gain peace of mind. Many people, especially those with serious diagnoses, get second opinions so they can understand all their options and make informed decisions, so don’t hesitate to get one if you have any doubts or need more information or clarification regarding your care. Note that some insurance plans require second opinions, while others don’t cover second opinions, so be sure to confirm with your insurance provider first.   

    How can I prepare for my appointment with a RASopathies doctor near Fontana, CA?

    Prepare for your appointment by gathering the following items: 

    • Copies of medical records (dating back at least one year) 
    • Your medical history, including illnesses, medical conditions, surgeries, and other doctors you see 
    • Family history of disease 
    • List of current prescription drugs, over-the-counter medicines, vitamins, and herbal remedies or supplements including names and doses 
    • Allergies to medications, food, latex, insects, etc.  
    • List of questions and concerns 
    • Your insurance card 

    You might also contact the provider’s office to see if they offer transportation or childcare services or if you’re allowed to bring a loved one for support or to take notes during your visit. 

    What questions should I ask my RASopathies doctor?

    Here are some sample questions: 

    • Can you explain in simple terms what this condition is and how it’s treated? 
    • What symptoms or side effects should I watch for? 
    • What tests will be involved, and when can I expect results? 
    • Are there other specialists I need to see? 
    • What’s the best way to reach you if I have follow-up questions? 

    How can I learn about the latest clinical trials and research advances my RASopathies doctor may know about?

    MediFind’s Clinical Trials tool asks you a series of questions to help you narrow down your search by health condition, age, gender, location, how far you’re willing to travel, and more. Each question you answer filters down the number of trials until you find the ones that are most relevant to you. 

    MediFind’s Latest Advances tool features summaries of recent articles published in medical journals. We use cutting-edge technology to scour medical publication databases for the latest research advancements on any given condition, then we simplify this information in a way that’s useful and easy to understand. 

    Can I filter my search to show male or female RASopathies doctors near Fontana, CA?

    Look for the filter feature on the left side of the RASopathies doctor search results page. Select “Female” or “Male” under the “Gender” category to search for female or male providers exclusively. If the “Any” option is selected, it will pull results for both male and female providers. 

    Can I filter my search to find a RASopathies doctor that offers video calls?

    Look for the filter feature on the left-side of the RASopathies doctor search results page. Select “Offers telehealth visits” under the Availability category to search for providers who offer virtual appointments (video calls). 

    Reviewed on: 11/11/24  

    By: MediFind Medical Staff 

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