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    Last Updated: 10/30/2025

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    MediFind found 109 doctor with experience in Primary Immunodeficiency (PID) near Orange, CA. Of these, 93 are Experienced, 14 are Advanced, 1 are Distinguished and 1 are Elite.

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    109 providers found
      Elite in Primary Immunodeficiency (PID)
      Allergy and Immunology | Adolescent Medicine
      Elite in Primary Immunodeficiency (PID)
      Allergy and Immunology | Adolescent Medicine
      Orange, CA 
       (0.1 miles away)
      Languages Spoken:
      English
      Offers Telehealth

      Sudhir Gupta is an Allergy and Immunologist and an Adolescent Medicine provider in Orange, California. Dr. Gupta is rated as an Elite provider by MediFind in the treatment of Primary Immunodeficiency (PID). His top areas of expertise are Primary Immunodeficiency (PID), Common Variable Immune Deficiency, X-Linked Agammaglobulinemia, and Immunodeficiency with Hyper IgM Type 1.

      Experienced in Primary Immunodeficiency (PID)
      Hematology Oncology | Hematology | Oncology
      Experienced in Primary Immunodeficiency (PID)
      Hematology Oncology | Hematology | Oncology

      Uc Regents

      101 The City Dr S, 
      Orange, CA 
       (2.0 miles away)
      Languages Spoken:
      English
      Offers Telehealth

      Misagh Karimi is a Hematologist Oncology specialist and a Hematologist in Orange, California. Dr. Karimi is rated as an Experienced provider by MediFind in the treatment of Primary Immunodeficiency (PID). His top areas of expertise are Breast Cancer, Familial Colorectal Cancer, Colorectal Cancer, and Paget Disease of the Breast.

      What does Elite, Distinguished, Advanced, Experienced mean?
      Distinguished in Primary Immunodeficiency (PID)
      Allergy and Immunology
      Distinguished in Primary Immunodeficiency (PID)
      Allergy and Immunology

      Uc Regents

      101 The City Dr S, 
      Orange, CA 
       (2.0 miles away)
      Languages Spoken:
      English

      Ankmalika Gupta is an Allergy and Immunologist in Orange, California. Dr. Gupta is rated as a Distinguished provider by MediFind in the treatment of Primary Immunodeficiency (PID). Her top areas of expertise are Primary Immunodeficiency (PID), Common Variable Immune Deficiency, X-Linked Agammaglobulinemia, and Immunodeficiency with Hyper IgM Type 1.

      Learn about our expert tiers
      Experienced in Primary Immunodeficiency (PID)
      Hematology Oncology | Hematology | Oncology
      Experienced in Primary Immunodeficiency (PID)
      Hematology Oncology | Hematology | Oncology

      City Of Hope Medical Foundation

      16300 Sand Canyon Ave, Suite 207, 
      Irvine, CA 
       (10.0 miles away)
      Languages Spoken:
      English
      Offers Telehealth

      Sudarsan Kollimuttathuillam is a Hematologist Oncology specialist and a Hematologist in Irvine, California. Dr. Kollimuttathuillam is rated as an Experienced provider by MediFind in the treatment of Primary Immunodeficiency (PID). His top areas of expertise are Iron Deficiency Anemia, Childhood Iron Deficiency Anemia, Dehydration, and Agranulocytosis.

      Experienced in Primary Immunodeficiency (PID)
      Hematology Oncology | Hematology | Oncology
      Experienced in Primary Immunodeficiency (PID)
      Hematology Oncology | Hematology | Oncology

      City Of Hope Medical Foundation

      16300 Sand Canyon Ave, Suite 207, 
      Irvine, CA 
       (10.0 miles away)
      Languages Spoken:
      English
      Offers Telehealth

      Luke Chen is a Hematologist Oncology specialist and a Hematologist in Irvine, California. Dr. Chen is rated as an Experienced provider by MediFind in the treatment of Primary Immunodeficiency (PID). His top areas of expertise are Clear Cell Sarcoma, Renal Cell Carcinoma (RCC), Chromophobe Renal Cell Carcinoma, WT1-Related Wilms Tumor Syndromes, and Prostatectomy.

      Experienced in Primary Immunodeficiency (PID)
      Hematology Oncology | Hematology | Oncology
      Experienced in Primary Immunodeficiency (PID)
      Hematology Oncology | Hematology | Oncology

      City Of Hope Medical Foundation

      16300 Sand Canyon Ave, Suite 207, 
      Irvine, CA 
       (10.0 miles away)
      Languages Spoken:
      English
      Offers Telehealth

      Danny Nguyen is a Hematologist Oncology specialist and a Hematologist in Irvine, California. Dr. Nguyen is rated as an Experienced provider by MediFind in the treatment of Primary Immunodeficiency (PID). His top areas of expertise are Pleuropulmonary Blastoma, Lynch Syndrome, Colorectal Cancer, and Familial Colorectal Cancer.

      William G. Harris
      Experienced in Primary Immunodeficiency (PID)
      Allergy and Immunology
      Experienced in Primary Immunodeficiency (PID)
      Allergy and Immunology
      1140 West La Veta Avenue, Suite 850, 
      Orange, CA 
       (0.8 miles away)
      Languages Spoken:
      English

      William Harris is an Allergy and Immunologist in Orange, California. Dr. Harris is rated as an Experienced provider by MediFind in the treatment of Primary Immunodeficiency (PID). His top areas of expertise are Hives, Sinusitis, Grass Allergy, and Allergic Rhinitis.

      Chao-i Lin
      Experienced in Primary Immunodeficiency (PID)
      Allergy and Immunology
      Experienced in Primary Immunodeficiency (PID)
      Allergy and Immunology
      1140 West La Veta Avenue, Suite 850, 
      Orange, CA 
       (0.8 miles away)
      Languages Spoken:
      English
      Accepting New Patients

      Chao-i Lin is an Allergy and Immunologist in Orange, California. Dr. Lin is rated as an Experienced provider by MediFind in the treatment of Primary Immunodeficiency (PID). His top areas of expertise are Hives, Allergic Rhinitis, Sinusitis, and Grass Allergy. Dr. Lin is currently accepting new patients.

      Advanced in Primary Immunodeficiency (PID)
      Internal Medicine
      Advanced in Primary Immunodeficiency (PID)
      Internal Medicine
      1010 West La Veta Avenue, Suite 610, 
      Orange, CA 
       (1.2 miles away)
      Languages Spoken:
      English
      Accepting New Patients

      Ata Rahbar is a primary care provider, practicing in Internal Medicine in Orange, California. Dr. Rahbar is rated as an Advanced provider by MediFind in the treatment of Primary Immunodeficiency (PID). His top areas of expertise are Apparent Mineralocorticoid Excess, Hyperaldosteronism, Familial Hyperaldosteronism, Gastrostomy, and Bone Marrow Aspiration. Dr. Rahbar is currently accepting new patients.

      Advanced in Primary Immunodeficiency (PID)
      Allergy and Immunology | Pediatrics
      Advanced in Primary Immunodeficiency (PID)
      Allergy and Immunology | Pediatrics

      Uc Regents

      101 The City Dr S, Uci Dept Of Medicine, 
      Orange, CA 
       (2.0 miles away)
      Languages Spoken:
      English
      Offers Telehealth

      Yesim Yilmaz-Demirdag is an Allergy and Immunologist and a Pediatrics provider in Orange, California. Dr. Yilmaz-Demirdag is rated as an Advanced provider by MediFind in the treatment of Primary Immunodeficiency (PID). Her top areas of expertise are Nonallergic Rhinopathy, Ozena, Primary Immunodeficiency (PID), and X-Linked Severe Combined Immunodeficiency.

      Experienced in Primary Immunodeficiency (PID)
      Family Medicine | Allergy and Immunology | Geriatrics
      Experienced in Primary Immunodeficiency (PID)
      Family Medicine | Allergy and Immunology | Geriatrics
      615 E Chapman Ave, 
      Orange, CA 
       (0.5 miles away)
      Languages Spoken:
      English
      Offers Telehealth

      Bryn Henderson is an Allergy and Immunologist and a Geriatrics provider in Orange, California. Dr. Henderson is rated as an Experienced provider by MediFind in the treatment of Primary Immunodeficiency (PID). His top areas of expertise are Dehydration, Vitamin D Deficiency, Muscle Spasms, and Cerebellar Degeneration.

      Experienced in Primary Immunodeficiency (PID)
      Internal Medicine
      Experienced in Primary Immunodeficiency (PID)
      Internal Medicine

      Providence Medical Foundation

      1100 W Stewart Dr, 
      Orange, CA 
       (0.7 miles away)
      Experience:
      9+ years
      Languages Spoken:
      English
      Offers Telehealth

      Bryan Nam is a primary care provider, practicing in Internal Medicine in Orange, California. Dr. Nam has been practicing medicine for over 9 years and is rated as an Experienced provider by MediFind in the treatment of Primary Immunodeficiency (PID). His top areas of expertise are Sepsis, Atypical Pneumonia, Hospital-Acquired Pneumonia, Endoscopy, and Vertebroplasty.

      Experienced in Primary Immunodeficiency (PID)
      Family Medicine
      Experienced in Primary Immunodeficiency (PID)
      Family Medicine
      1140 West La Veta Avenue, Suite 700, 
      Orange, CA 
       (0.8 miles away)
      Languages Spoken:
      English
      Accepting New Patients

      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 Primary Immunodeficiency (PID). Her top areas of expertise are Type 2 Diabetes (T2D), Osteomyelitis in Children, Hypertension, High Cholesterol, and Carotid Artery Surgery. Dr. Garcia is currently accepting new patients.

      Experienced in Primary Immunodeficiency (PID)
      Allergy and Immunology
      Experienced in Primary Immunodeficiency (PID)
      Allergy and Immunology
      1140 West La Veta Avenue, Suite 850, 
      Orange, CA 
       (0.8 miles away)
      Languages Spoken:
      English
      Accepting New Patients

      Ye Jung is an Allergy and Immunologist in Orange, California. Dr. Jung is rated as an Experienced provider by MediFind in the treatment of Primary Immunodeficiency (PID). Her top areas of expertise are Grass Allergy, Allergic Rhinitis, Ozena, and Nonallergic Rhinopathy. Dr. Jung is currently accepting new patients.

      Experienced in Primary Immunodeficiency (PID)
      Internal Medicine
      Experienced in Primary Immunodeficiency (PID)
      Internal Medicine
      2141 West Orangewood Avenue, 
      Orange, CA 
       (1.2 miles away)
      Languages Spoken:
      English
      Accepting New Patients
      Offers Telehealth

      Shahab Zahed is a primary care provider, practicing in Internal Medicine in Orange, California. Dr. Zahed is rated as an Experienced provider by MediFind in the treatment of Primary Immunodeficiency (PID). His top areas of expertise are Primary Immunodeficiency (PID), Amyotrophic Lateral Sclerosis (ALS or Lou Gehrig's Disease), Spinal Muscular Atrophy (SMA), Hip Replacement, and Gastrostomy. Dr. Zahed is currently accepting new patients.

      Experienced in Primary Immunodeficiency (PID)
      Allergy and Immunology
      Experienced in Primary Immunodeficiency (PID)
      Allergy and Immunology
      705 West La Veta Avenue, Suite 101, 
      Orange, CA 
       (1.2 miles away)
      Languages Spoken:
      English
      Accepting New Patients

      Donald Levy is an Allergy and Immunologist in Orange, California. Dr. Levy is rated as an Experienced provider by MediFind in the treatment of Primary Immunodeficiency (PID). His top areas of expertise are Hives, Angioedema, Hereditary Angioedema, and Grass Allergy. Dr. Levy is currently accepting new patients.

      Experienced in Primary Immunodeficiency (PID)
      Internal Medicine
      Experienced in Primary Immunodeficiency (PID)
      Internal Medicine
      1010 West La Veta Avenue, Suite 610, 
      Orange, CA 
       (1.2 miles away)
      Languages Spoken:
      English
      Accepting New Patients

      Bardia Sadr is a primary care provider, practicing in Internal Medicine in Orange, California. Dr. Sadr is rated as an Experienced provider by MediFind in the treatment of Primary Immunodeficiency (PID). His top areas of expertise are Sepsis, Peptic Ulcer, Necrosis, Primary Immunodeficiency (PID), and Gastrostomy. Dr. Sadr is currently accepting new patients.

      Experienced in Primary Immunodeficiency (PID)
      Allergy and Immunology
      Experienced in Primary Immunodeficiency (PID)
      Allergy and Immunology
      725 West La Veta Avenue, Suite 100, 
      Orange, CA 
       (1.2 miles away)
      Languages Spoken:
      English
      Accepting New Patients

      Diem-tran Nguyen is an Allergy and Immunologist in Orange, California. Dr. Nguyen is rated as an Experienced provider by MediFind in the treatment of Primary Immunodeficiency (PID). Her top areas of expertise are Nonallergic Rhinopathy, Ozena, Hives, and Allergic Rhinitis. Dr. Nguyen is currently accepting new patients.

      Experienced in Primary Immunodeficiency (PID)
      Internal Medicine
      Experienced in Primary Immunodeficiency (PID)
      Internal Medicine

      Providence Medical Foundation

      2501 E Chapman Ave, 
      Orange, CA 
       (1.6 miles away)
      Languages Spoken:
      English

      Shirin Majdizadeh is a primary care provider, practicing in Internal Medicine in Orange, California. Dr. Majdizadeh is rated as an Experienced provider by MediFind in the treatment of Primary Immunodeficiency (PID). Her top areas of expertise are Apparent Mineralocorticoid Excess, Hyperaldosteronism, Familial Hyperaldosteronism, Colonoscopy, and Endoscopy.

      Experienced in Primary Immunodeficiency (PID)
      Family Medicine
      Experienced in Primary Immunodeficiency (PID)
      Family Medicine

      Providence Medical Foundation

      2501 E Chapman Ave, 
      Orange, CA 
       (1.6 miles away)
      Languages Spoken:
      English

      Allen Houshiar is a primary care provider, practicing in Family Medicine in Orange, California. Dr. Houshiar is rated as an Experienced provider by MediFind in the treatment of Primary Immunodeficiency (PID). His top areas of expertise are Chronic Rhinosinusitis with Nasal Polyps (CRSwNP), New Daily Persistent Headache (NDPH), Sinusitis, and Empyema.

      Showing 1-20 of 109

      Last Updated: 10/30/2025

      When should I see a Primary Immunodeficiency (PID) doctor near Orange, 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 Primary Immunodeficiency (PID) doctor near Orange, 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 Primary Immunodeficiency (PID) doctors near Orange, 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 Primary Immunodeficiency (PID) doctors near Orange, 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 Primary Immunodeficiency (PID) doctor near Orange, 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 Primary Immunodeficiency (PID) doctor search results page. 

      Why is it important to get a second opinion from a different Primary Immunodeficiency (PID) 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 Primary Immunodeficiency (PID) doctor near Orange, 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 Primary Immunodeficiency (PID) 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 Primary Immunodeficiency (PID) 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 Primary Immunodeficiency (PID) doctors near Orange, CA?

      Look for the filter feature on the left side of the Primary Immunodeficiency (PID) 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 Primary Immunodeficiency (PID) doctor that offers video calls?

      Look for the filter feature on the left-side of the Primary Immunodeficiency (PID) 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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