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    Last Updated: 02/22/2026

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    MediFind found 57 doctor with experience in Methylmalonic Acidemia with Homocystinuria near Irvine, CA. Of these, 38 are Experienced, 18 are Advanced and 1 are Distinguished.

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    57 providers found
      Distinguished in Methylmalonic Acidemia with Homocystinuria
      General Practice
      Distinguished in Methylmalonic Acidemia with Homocystinuria
      General Practice

      Rita R Ellithorpe MD Inc

      13422 Newport Ave, Suite L, 
      Tustin, CA 
       (4.1 miles away)
      Experience:
      44+ years
      Languages Spoken:
      English
      Offers Telehealth

      Rita Ellithorpe is a primary care provider, practicing in General Practice in Tustin, California. Dr. Ellithorpe has been practicing medicine for over 44 years and is rated as a Distinguished provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. Her top areas of expertise are Heavy Metal Poisoning, Menopause, Homocystinuria, and Methylmalonic Acidemia with Homocystinuria.

      Advanced in Methylmalonic Acidemia with Homocystinuria
      Internal Medicine
      Advanced in Methylmalonic Acidemia with Homocystinuria
      Internal Medicine

      Hoag Clinic

      16300 Sand Canyon Ave, Suite 311, 
      Irvine, CA 
       (3.5 miles away)
      Languages Spoken:
      English
      Offers Telehealth

      Michael Waldman is a primary care provider, practicing in Internal Medicine in Irvine, California. Dr. Waldman is rated as an Advanced provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. His top areas of expertise are Type 2 Diabetes (T2D), High Cholesterol, Autoerythrocyte Sensitivity, and Gardner-Diamond Syndrome.

      Advanced in Methylmalonic Acidemia with Homocystinuria
      Family Medicine
      Advanced in Methylmalonic Acidemia with Homocystinuria
      Family Medicine
      420 South Bristol Street, 
      Santa Ana, CA 
       (6.3 miles away)
      Languages Spoken:
      English

      Jose Cilliani is a primary care provider, practicing in Family Medicine in Santa Ana, California. Dr. Cilliani is rated as an Advanced provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. His top areas of expertise are Vitamin D Deficiency, Osteomyelitis in Children, Homocystinuria, and Methylmalonic Acidemia with Homocystinuria.

      Learn about our expert tiers
      Advanced in Methylmalonic Acidemia with Homocystinuria
      Internal Medicine
      Advanced in Methylmalonic Acidemia with Homocystinuria
      Internal Medicine
      1240 East Chapman Avenue, 
      Orange, CA 
       (7.0 miles away)
      Languages Spoken:
      English

      Pravin Sharma is a primary care provider, practicing in Internal Medicine in Orange, California. Dr. Sharma is rated as an Advanced provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. His top areas of expertise are Heart Murmurs, Sitosterolemia, High Cholesterol, and Nasal Flaring.

      Advanced in Methylmalonic Acidemia with Homocystinuria
      Medical Genetics
      Advanced in Methylmalonic Acidemia with Homocystinuria
      Medical Genetics
      1201 West La Veta Avenue, 
      Orange, CA 
       (7.0 miles away)
      Languages Spoken:
      English
      Accepting New Patients

      Cristel Chapel is a Medical Genetics provider in Orange, California. Dr. Chapel is rated as an Advanced provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. Her top areas of expertise are CLN1 Disease, CLN5 Disease, CLN2 Disease, and CLN3 Disease. Dr. Chapel is currently accepting new patients.

      Advanced in Methylmalonic Acidemia with Homocystinuria
      Internal Medicine
      Advanced in Methylmalonic Acidemia with Homocystinuria
      Internal Medicine
      845 East Chapman Avenue, 
      Orange, CA 
       (7.2 miles away)
      Languages Spoken:
      English

      Thomas Hryniewicki is a primary care provider, practicing in Internal Medicine in Orange, California. Dr. Hryniewicki is rated as an Advanced provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. His top areas of expertise are Gardner-Diamond Syndrome, Autoerythrocyte Sensitivity, Purpura, and Cirrhosis.

      Advanced in Methylmalonic Acidemia with Homocystinuria
      Family Medicine
      Advanced in Methylmalonic Acidemia with Homocystinuria
      Family Medicine

      Jeremy La Motte MD

      Laguna Hills, CA 
       (9.8 miles away)
      Languages Spoken:
      English
      Offers Telehealth

      Jeremy Lamotte is a primary care provider, practicing in Family Medicine in Laguna Hills, California. Dr. Lamotte is rated as an Advanced provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. His top areas of expertise are Homocystinuria, Methylmalonic Acidemia with Homocystinuria, Inborn Amino Acid Metabolism Disorder, and Erectile Dysfunction (ED).

      Experienced in Methylmalonic Acidemia with Homocystinuria
      Internal Medicine | General Practice
      Experienced in Methylmalonic Acidemia with Homocystinuria
      Internal Medicine | General Practice
      2500 Alton Pkwy, Suite 108, 
      Irvine, CA 
       (0.7 miles away)
      Languages Spoken:
      English
      Offers Telehealth

      Bang Kim is a primary care provider, practicing in Internal Medicine and General Practice in Irvine, California. Dr. Kim is rated as an Experienced provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. His top areas of expertise are Osteomyelitis in Children, Non-Alcoholic Fatty Liver Disease, Chronic Idiopathic Constipation (CIC), and Visceromegaly.

      Experienced in Methylmalonic Acidemia with Homocystinuria
      Internal Medicine
      Experienced in Methylmalonic Acidemia with Homocystinuria
      Internal Medicine

      Omid Vesal, Md, Medical Corporation

      2500 Alton Pkwy, Suite 101, 
      Irvine, CA 
       (0.7 miles away)
      Languages Spoken:
      English

      Omid Vesal is a primary care provider, practicing in Internal Medicine in Irvine, California. Dr. Vesal is rated as an Experienced provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. His top areas of expertise are Dehydration, Pneumonia, Androgen Insensitivity Syndrome, and Neuralgia.

      Experienced in Methylmalonic Acidemia with Homocystinuria
      Experienced in Methylmalonic Acidemia with Homocystinuria

      Oso Specialty Infusion Inc

      17175 Gillette Ave, Suite B, 
      Irvine, CA 
       (1.6 miles away)
      Languages Spoken:
      English
      Offers Telehealth

      Nirav Patel is a Neurologist in Irvine, California. Dr. Patel is rated as an Experienced provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. His top areas of expertise are Stroke, Seizures, Alzheimer's Disease, and Migraine.

      Experienced in Methylmalonic Acidemia with Homocystinuria
      Family Medicine
      Experienced in Methylmalonic Acidemia with Homocystinuria
      Family Medicine

      Restoration Healthcare Inc

      18818 Teller Ave, Suite 170, 
      Irvine, CA 
       (1.9 miles away)
      Languages Spoken:
      English
      Offers Telehealth

      Walid Faraj is a primary care provider, practicing in Family Medicine in Irvine, California. Dr. Faraj is rated as an Experienced provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. His top areas of expertise are Immunodeficiency with Hyper IgM Type 1, Dihydropyrimidine Dehydrogenase Deficiency, Gracile Syndrome, and Erdheim-Chester Disease.

      Experienced in Methylmalonic Acidemia with Homocystinuria
      Family Medicine
      Experienced in Methylmalonic Acidemia with Homocystinuria
      Family Medicine

      Hoag Clinic

      1170 Baker St, Suite H1, 
      Costa Mesa, CA 
       (4.6 miles away)
      Languages Spoken:
      English
      Offers Telehealth

      Thao Phan is a primary care provider, practicing in Family Medicine in Costa Mesa, California. Dr. Phan is rated as an Experienced provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. Her top areas of expertise are Purpura, Autoerythrocyte Sensitivity, Gardner-Diamond Syndrome, and Type 2 Diabetes (T2D).

      Experienced in Methylmalonic Acidemia with Homocystinuria
      Medical Genetics
      Experienced in Methylmalonic Acidemia with Homocystinuria
      Medical Genetics
      1201 West La Veta Avenue, 
      Orange, CA 
       (7.0 miles away)
      Languages Spoken:
      English
      Accepting New Patients
      Offers Telehealth

      Richard Chang is a Medical Genetics provider in Orange, California. Dr. Chang is rated as an Experienced provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. His top areas of expertise are Phenylketonuria (PKU), Maternal Hyperphenylalaninemia, Adrenoleukodystrophy (ALD), and Citrullinemia. Dr. Chang is currently accepting new patients.

      Experienced in Methylmalonic Acidemia with Homocystinuria
      Medical Genetics
      Experienced in Methylmalonic Acidemia with Homocystinuria
      Medical Genetics
      1201 West La Veta Avenue, 
      Orange, CA 
       (7.0 miles away)
      Languages Spoken:
      English
      Accepting New Patients
      Offers Telehealth

      Changrui Xiao is a Medical Genetics provider in Orange, California. Dr. Xiao is rated as an Experienced provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. His top areas of expertise are Glutaric Acidemia Type 2, Retinopathy Pigmentary Mental Retardation, Adrenoleukodystrophy (ALD), and X-Linked Creatine Deficiency. Dr. Xiao is currently accepting new patients.

      Experienced in Methylmalonic Acidemia with Homocystinuria
      Family Medicine
      Experienced in Methylmalonic Acidemia with Homocystinuria
      Family Medicine

      Centers For Family Medicine Gp

      845 E Chapman Ave, 
      Orange, CA 
       (7.2 miles away)
      Languages Spoken:
      English

      Hal Shimazu is a primary care provider, practicing in Family Medicine in Orange, California. Dr. Shimazu is rated as an Experienced provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. His top areas of expertise are High Cholesterol, Cirrhosis, Gardner-Diamond Syndrome, and Autoerythrocyte Sensitivity.

      Experienced in Methylmalonic Acidemia with Homocystinuria
      Family Medicine
      Experienced in Methylmalonic Acidemia with Homocystinuria
      Family Medicine

      Pavilion Family Physicians

      1140 W La Veta Ave Ste 700, 
      Orange, CA 
       (7.7 miles away)
      Languages Spoken:
      English

      Catherine Garcia is a primary care provider, practicing in Family Medicine in Orange, California. Dr. Garcia is rated as an Experienced provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. Her top areas of expertise are Type 2 Diabetes (T2D), Osteomyelitis in Children, Hypertension, High Cholesterol, and Carotid Artery Surgery.

      Experienced in Methylmalonic Acidemia with Homocystinuria
      Family Medicine
      Experienced in Methylmalonic Acidemia with Homocystinuria
      Family Medicine
      23672 Birtcher Drive, Suite A, 
      Lake Forest, CA 
       (8.5 miles away)
      Languages Spoken:
      English
      Accepting New Patients
      Offers Telehealth

      Mohammed Ali is a primary care provider, practicing in Family Medicine in Lake Forest, California. Dr. Ali is rated as an Experienced provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. His top areas of expertise are High Cholesterol, Premature Ovarian Failure, Down Syndrome, and Hypogonadism Primary Partial Alopecia. Dr. Ali is currently accepting new patients.

      Experienced in Methylmalonic Acidemia with Homocystinuria
      Geriatrics
      Experienced in Methylmalonic Acidemia with Homocystinuria
      Geriatrics

      Office

      23181 Verdugo Dr Ste 103A, 
      Laguna Hills, CA 
       (9.8 miles away)
      Languages Spoken:
      English

      Norman Vinn is a primary care provider, practicing in Geriatrics in Laguna Hills, California. Dr. Vinn is rated as an Experienced provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. His top areas of expertise are Type 2 Diabetes (T2D), Hyperaldosteronism, Familial Hyperaldosteronism, and Apparent Mineralocorticoid Excess.

      Advanced in Methylmalonic Acidemia with Homocystinuria
      Internal Medicine
      Advanced in Methylmalonic Acidemia with Homocystinuria
      Internal Medicine
      400 Newport Ctr Dr, Suite 601, 
      Newport Beach, CA 
       (5.5 miles away)
      Languages Spoken:
      English
      Offers Telehealth

      Ramin Alizadeh is a primary care provider, practicing in Internal Medicine in Newport Beach, California. Dr. Alizadeh is rated as an Advanced provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. His top areas of expertise are Methylmalonic Acidemia with Homocystinuria, Sulfite Oxidase Deficiency, Hypermethioninemia, and High Cholesterol.

      Advanced in Methylmalonic Acidemia with Homocystinuria
      Geriatrics | Internal Medicine
      Advanced in Methylmalonic Acidemia with Homocystinuria
      Geriatrics | Internal Medicine

      Felice L Gersh MD Inc

      16300 Sand Canyon Ave Ste 311, 
      Irvine, CA 
       (5.6 miles away)
      Languages Spoken:
      English

      Hong Shune is a primary care provider, practicing in Geriatrics and Internal Medicine in Irvine, California. Dr. Shune is rated as an Advanced provider by MediFind in the treatment of Methylmalonic Acidemia with Homocystinuria. Her top areas of expertise are Methylmalonic Acidemia with Homocystinuria, Homocystinuria, Juvenile Primary Osteoporosis, and Inborn Amino Acid Metabolism Disorder.

      Showing 1-20 of 57

      Last Updated: 02/22/2026

      What is the definition of Methylmalonic Acidemia with Homocystinuria?

      Methylmalonic acidemia with homocystinuria is a disorder in which the body is unable to correctly process certain protein building blocks (amino acids), fat building blocks (fatty acids), and  cholesterol. The body is also unable to convert the amino acid homocysteine to another amino acid, methionine. Individuals with this disorder have a combination of features from two separate conditions, methylmalonic acidemia and homocystinuria. There are several forms of this combined condition, and the different forms have different genetic causes and signs and symptoms. The most common and best understood form, called cblC type (or cobalamin C disease), occurs in about 80 percent of affected individuals.

      When should I see a Methylmalonic Acidemia with Homocystinuria doctor near Irvine, 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 Methylmalonic Acidemia with Homocystinuria doctor near Irvine, 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 Methylmalonic Acidemia with Homocystinuria doctors near Irvine, 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 Methylmalonic Acidemia with Homocystinuria doctors near Irvine, 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 Methylmalonic Acidemia with Homocystinuria doctor near Irvine, 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 Methylmalonic Acidemia with Homocystinuria doctor search results page. 

      Why is it important to get a second opinion from a different Methylmalonic Acidemia with Homocystinuria 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 Methylmalonic Acidemia with Homocystinuria doctor near Irvine, 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 Methylmalonic Acidemia with Homocystinuria 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 Methylmalonic Acidemia with Homocystinuria 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 Methylmalonic Acidemia with Homocystinuria doctors near Irvine, CA?

      Look for the filter feature on the left side of the Methylmalonic Acidemia with Homocystinuria 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 Methylmalonic Acidemia with Homocystinuria doctor that offers video calls?

      Look for the filter feature on the left-side of the Methylmalonic Acidemia with Homocystinuria 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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