The 20 Best Vitamin B12 Deficiency Doctors Near Me in Long Beach, CA

Find the Top Vitamin B12 Deficiency Experts and Specialists

Last Updated: 04/28/2026

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MediFind found 99 doctor with experience in Vitamin B12 Deficiency near Long Beach, CA. Of these, 87 are Experienced and 12 are Advanced.

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99 providers found
    Advanced in Vitamin B12 Deficiency
    Internal Medicine
    Advanced in Vitamin B12 Deficiency
    Internal Medicine

    Oncology Physicians Network Of California PC

    3747 Worsham Ave, 
    Long Beach, CA 
     (4.7 miles away)
    Experience:
    36+ years
    Languages Spoken:
    English
    Offers Telehealth

    Lihong Wu is an Internal Medicine provider practicing medicine in Long Beach, California. She has been practicing medicine for over 36 years. Dr. Wu is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. She is also highly rated in 53 other conditions, according to our data. Her clinical expertise encompasses Familial Colorectal Cancer, Interstitial Nephritis, Liver Failure, Gastrostomy, and Endoscopy. Dr. Wu is board certified in American Board Internal Medicine.

    Experienced in Vitamin B12 Deficiency
    Internal Medicine
    Experienced in Vitamin B12 Deficiency
    Internal Medicine

    Oncology Physicians Network Of California PC

    1043 Elm Ave, 
    Long Beach, CA 
     (0.7 miles away)
    Experience:
    48+ years
    Languages Spoken:
    English
    Offers Telehealth

    Nerses Tchekmedyian is an Internal Medicine provider practicing medicine in Long Beach, California. He has been practicing medicine for over 48 years. Dr. Tchekmedyian is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 3 other conditions, according to our data. His clinical expertise encompasses Juvenile Primary Osteoporosis, Iron Deficiency Anemia, Familial Colorectal Cancer, and Stomach Cancer. Dr. Tchekmedyian is board certified in American Board Internal Medicine.

    Experienced in Vitamin B12 Deficiency
    Internal Medicine
    Experienced in Vitamin B12 Deficiency
    Internal Medicine

    Oncology Physicians Network Of California PC

    2653 Elm Ave, 
    Long Beach, CA 
     (2.4 miles away)
    Experience:
    23+ years
    Languages Spoken:
    English
    Offers Telehealth

    Eric Cheung is an Internal Medicine provider practicing medicine in Long Beach, California. He has been practicing medicine for over 23 years. Dr. Cheung is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 21 other conditions, according to our data. His clinical expertise encompasses Thrombocytopenia, Febrile Neutropenia, Agranulocytosis, and Chronic Familial Neutropenia. Dr. Cheung is board certified in American Board Of Internal Medicine.

    Learn about our expert tiers
    Advanced in Vitamin B12 Deficiency
    Family Medicine | General Practice | Internal Medicine
    Advanced in Vitamin B12 Deficiency
    Family Medicine | General Practice | Internal Medicine

    Complete Care Family Medical Clinic

    1231 N Avalon Blvd, 
    Wilmington, CA 
     (4.2 miles away)
    Experience:
    26+ years
    Languages Spoken:
    English

    Homan Siman is a primary care provider, practicing in Internal Medicine and Family Medicine in Wilmington, California. He has been practicing medicine for over 26 years. Dr. Siman is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 44 other conditions, according to our data. His clinical expertise encompasses Methylmalonic Acidemia with Homocystinuria, Homocystinuria, Inborn Amino Acid Metabolism Disorder, and Cirrhosis. Dr. Siman is board certified in American Board Of Internal Medicine.

    Advanced in Vitamin B12 Deficiency
    Internal Medicine
    Advanced in Vitamin B12 Deficiency
    Internal Medicine

    Oncology Physicians Network Of California PC

    3747 Worsham Ave, 
    Long Beach, CA 
     (4.7 miles away)
    Experience:
    31+ years
    Languages Spoken:
    English
    Offers Telehealth

    George Semeniuk is an Internal Medicine provider practicing medicine in Long Beach, California. He has been practicing medicine for over 31 years. Dr. Semeniuk is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 83 other conditions, according to our data. His clinical expertise encompasses Small Cell Lung Cancer (SCLC), Lung Cancer, Pleuropulmonary Blastoma, and Myelodysplastic Syndrome (MDS). Dr. Semeniuk is board certified in American Board Internal Medicine.

    Experienced in Vitamin B12 Deficiency
    Internal Medicine
    Experienced in Vitamin B12 Deficiency
    Internal Medicine

    Oncology Physicians Network Of California PC

    3747 Worsham Ave, 
    Long Beach, CA 
     (4.7 miles away)
    Experience:
    39+ years
    Languages Spoken:
    English
    Offers Telehealth

    Kiem Liem is an Internal Medicine provider practicing medicine in Long Beach, California. He has been practicing medicine for over 39 years. Dr. Liem is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 5 other conditions, according to our data. His clinical expertise encompasses End-Stage Renal Disease (ESRD), Thrombocytopenia, Dehydration, and Paget Disease of the Breast. Dr. Liem is board certified in American Board Internal Medicine.

    Experienced in Vitamin B12 Deficiency
    Physician Assistant
    Experienced in Vitamin B12 Deficiency
    Physician Assistant
    1045 Atlantic Ave Ste 719, 
    Long Beach, CA 
     (0.9 miles away)
    Languages Spoken:
    English

    Emily Jairam is a Physician Assistant practicing medicine in Long Beach, California. Ms. Jairam is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her clinical expertise encompasses Vitamin B12 Deficiency.

    Experienced in Vitamin B12 Deficiency
    Nurse Practitioner
    Experienced in Vitamin B12 Deficiency
    Nurse Practitioner

    Long Beach-Elm

    1043 Elm Ave Ste 104, 
    Long Beach, CA 
     (0.9 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Chona Ray is a Nurse Practitioner practicing medicine in Long Beach, California. Ms. Ray is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. She is also highly rated in 6 other conditions, according to our data. Her clinical expertise encompasses Protein C Deficiency, Hereditary Resistance to Anti-Vitamin K, Congenital Antithrombin 3 Deficiency, and Protein S Deficiency.

    Experienced in Vitamin B12 Deficiency
    Family Medicine
    Experienced in Vitamin B12 Deficiency
    Family Medicine

    Long Beach Primary Care Associates

    611 E Anaheim St, 
    Long Beach, CA 
     (1.0 miles away)
    Experience:
    14+ years
    Languages Spoken:
    English

    Loan Truong is a primary care provider, practicing in Family Medicine in Long Beach, California. She has been practicing medicine for over 14 years. Dr. Truong is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. She is also highly rated in 29 other conditions, according to our data. Her clinical expertise encompasses Atopic Dermatitis, High Cholesterol, Scabies, and Acne. Dr. Truong is board certified in American Board Of Family Medicine.

    Experienced in Vitamin B12 Deficiency
    Family Medicine
    Experienced in Vitamin B12 Deficiency
    Family Medicine

    Cal-Care Medical Group Inc.

    500 W Willow St, 
    Long Beach, CA 
     (2.4 miles away)
    Languages Spoken:
    English

    Daryoush Kashani is a primary care provider, practicing in Family Medicine in Long Beach, California. Dr. Kashani is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 24 other conditions, according to our data. His clinical expertise encompasses Vitamin D Deficiency, High Cholesterol, Familial Hypertriglyceridemia, and Obesity in Children.

    Experienced in Vitamin B12 Deficiency
    Internal Medicine
    Experienced in Vitamin B12 Deficiency
    Internal Medicine

    Prohealth Partners A Medical Group Inc

    300 Redondo Ave, 
    Long Beach, CA 
     (2.4 miles away)
    Experience:
    41+ years
    Languages Spoken:
    English
    Offers Telehealth

    Clayton Dejong is a primary care provider, practicing in Internal Medicine in Long Beach, California. He has been practicing medicine for over 41 years. Dr. Dejong is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 4 other conditions, according to our data. His clinical expertise encompasses Syringomyelia, Syringobulbia, Chiari Malformation Type 2, and High Cholesterol. Dr. Dejong is board certified in American Board Of Internal Medicine.

    Experienced in Vitamin B12 Deficiency
    Internal Medicine
    Experienced in Vitamin B12 Deficiency
    Internal Medicine

    Oncology Physicians Network Of California PC

    2653 Elm Ave, 
    Long Beach, CA 
     (2.4 miles away)
    Experience:
    11+ years
    Languages Spoken:
    English

    Michael Del Rosario is an Internal Medicine provider practicing medicine in Long Beach, California. He has been practicing medicine for over 11 years. Dr. Del Rosario is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 4 other conditions, according to our data. His clinical expertise encompasses Thrombocytopenia, Colorectal Cancer, Chronic Familial Neutropenia, and Agranulocytosis. Dr. Del Rosario is board certified in American Board Of Internal Medicine.

    Experienced in Vitamin B12 Deficiency
    General Practice
    Experienced in Vitamin B12 Deficiency
    General Practice

    Complete Care Family Medical Clinic

    1231 N Avalon Blvd, 
    Wilmington, CA 
     (4.2 miles away)
    Experience:
    12+ years
    Languages Spoken:
    English
    Offers Telehealth

    Homayoun Siman is a primary care provider, practicing in General Practice in Wilmington, California. He has been practicing medicine for over 12 years. Dr. Siman is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 56 other conditions, according to our data. His clinical expertise encompasses Familial Combined Hyperlipidemia, Xanthoma, Cirrhosis, Hypertensive Heart Disease, and Osteotomy.

    Experienced in Vitamin B12 Deficiency
    Experienced in Vitamin B12 Deficiency

    Cardiovascular Care Inc.

    3801 Katella Ave Ste 401, 
    Los Alamitos, CA 
     (7.7 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Bruce Vannatta is a Cardiologist practicing medicine in Los Alamitos, California. Dr. Vannatta is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 44 other conditions, according to our data. His clinical expertise encompasses High Cholesterol, Arterial Embolism, Nasal Flaring, Apoplexy, and Pacemaker Implantation.

    Experienced in Vitamin B12 Deficiency
    Hematology
    Experienced in Vitamin B12 Deficiency
    Hematology
    3822 Katella Avenue, 
    Los Alamitos, CA 
     (7.7 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Collin Vu is a Hematologist practicing medicine in Los Alamitos, California. Dr. Vu is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 50 other conditions, according to our data. His clinical expertise encompasses Anemia, Pleuropulmonary Blastoma, Small Cell Lung Cancer (SCLC), and ALK-Positive Non-Small Cell Lung Cancer. Dr. Vu is currently accepting new patients.

    Experienced in Vitamin B12 Deficiency
    Oncology | Hematology
    Experienced in Vitamin B12 Deficiency
    Oncology | Hematology
    2780 Skypark Drive, Suite 350, 
    Torrance, CA 
     (8.5 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Mark Ngo is a Hematologist and an Oncologist practicing medicine in Torrance, California. Dr. Ngo is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 28 other conditions, according to our data. His clinical expertise encompasses Thrombocytopenia, Drug-Induced Thrombocytopenia, Mediastinal Tumor, and Paget Disease of the Breast. Dr. Ngo is currently accepting new patients.

    Experienced in Vitamin B12 Deficiency
    Gastroenterology
    Experienced in Vitamin B12 Deficiency
    Gastroenterology
    23600 Telo Avenue, Suite 260, 
    Torrance, CA 
     (8.7 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Jerome Cohen is a Gastroenterologist practicing medicine in Torrance, California. Dr. Cohen is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 50 other conditions, according to our data. His clinical expertise encompasses Gastroesophageal Reflux Disease (GERD), Barrett Esophagus, Chronic Erosive Gastritis, Endoscopy, and Gastrectomy. Dr. Cohen is currently accepting new patients.

    Experienced in Vitamin B12 Deficiency
    Gastroenterology
    Experienced in Vitamin B12 Deficiency
    Gastroenterology
    23600 Telo Avenue, Suite 260, 
    Torrance, CA 
     (8.7 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Oren Zaidel is a Gastroenterologist practicing medicine in Torrance, California. Dr. Zaidel is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 43 other conditions, according to our data. His clinical expertise encompasses Gas Bloat Syndrome, Gastroesophageal Reflux Disease (GERD), Irritable Bowel Syndrome (IBS), Endoscopy, and Colonoscopy. Dr. Zaidel is currently accepting new patients.

    Experienced in Vitamin B12 Deficiency
    Endocrinology
    Experienced in Vitamin B12 Deficiency
    Endocrinology

    Cynthia Williams M.D. Inc.

    23560 Madison St Ste 103, 
    Torrance, CA 
     (9.2 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Cynthia Williams is an Endocrinologist practicing medicine in Torrance, California. Dr. Williams is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. She is also highly rated in 2 other conditions, according to our data. Her clinical expertise encompasses Hashimoto Thyroiditis, Thyroid Nodule, Malabsorption, and Adrenal Insufficiency Pediatric.

    Experienced in Vitamin B12 Deficiency
    Geriatrics | Internal Medicine
    Experienced in Vitamin B12 Deficiency
    Geriatrics | Internal Medicine
    23451 Madison Street, Suite 140, 
    Torrance, CA 
     (9.4 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Nicole Lawrence is a primary care provider, practicing in Internal Medicine and Geriatrics in Torrance, California. Dr. Lawrence is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her clinical expertise encompasses Vitamin B12 Deficiency, High Cholesterol, Subacute Combined Degeneration, Bone Graft, and Vertebroplasty. Dr. Lawrence is currently accepting new patients.

    Showing 1-20 of 99

    Last Updated: 04/28/2026

    When should I see a Vitamin B12 Deficiency doctor near Long Beach, 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 Vitamin B12 Deficiency doctor near Long Beach, 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 Vitamin B12 Deficiency doctors near Long Beach, 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 Vitamin B12 Deficiency doctors near Long Beach, 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 Vitamin B12 Deficiency doctor near Long Beach, 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 Vitamin B12 Deficiency doctor search results page. 

    Why is it important to get a second opinion from a different Vitamin B12 Deficiency 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 Vitamin B12 Deficiency doctor near Long Beach, 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 Vitamin B12 Deficiency 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 Vitamin B12 Deficiency 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 Vitamin B12 Deficiency doctors near Long Beach, CA?

    Look for the filter feature on the left side of the Vitamin B12 Deficiency 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 Vitamin B12 Deficiency doctor that offers video calls?

    Look for the filter feature on the left-side of the Vitamin B12 Deficiency 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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