The 20 Best Vitamin B12 Deficiency Doctors Near Me in Castro Valley, CA

Find the Top Vitamin B12 Deficiency Experts and Specialists

Last Updated: 02/22/2026

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MediFind found 44 doctor with experience in Vitamin B12 Deficiency near Castro Valley, CA. Of these, 38 are Experienced, 3 are Advanced and 2 are Distinguished.

Location
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44 providers found
    Distinguished in Vitamin B12 Deficiency
    Cardiology | Cardiac Electrophysiology
    Distinguished in Vitamin B12 Deficiency
    Cardiology | Cardiac Electrophysiology

    West Coast Medicine And Cardiology Inc

    27171 Calaroga Ave, Suite 2, 
    Hayward, CA 
     (4.4 miles away)
    Experience:
    44+ years
    Languages Spoken:
    English, Filipino, Hindi, Punjabi
    Offers Telehealth

    Rajesh Suri is a Cardiologist and a Cardiac Electrophysiologist in Hayward, California. Dr. Suri has been practicing medicine for over 44 years and is rated as a Distinguished provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Varicose Veins, Stasis Dermatitis and Ulcers, Venous Insufficiency, Gastrostomy, and Endoscopy.

    Advanced in Vitamin B12 Deficiency
    Advanced in Vitamin B12 Deficiency

    University Healthcare Alliance

    20055 Lake Chabot Rd Ste 130, 
    Castro Valley, CA 
     (1.3 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Nitin Joshi is an Oncologist in Castro Valley, California. Dr. Joshi is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Familial Colorectal Cancer, Colorectal Cancer, Gastroesophageal Junction Cancer, and Lung Cancer.

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

    Stanford Medicine Partners

    20642 John Dr, 
    Castro Valley, CA 
     (0.9 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Jaya Karnani is a Family Medicine provider in Castro Valley, California. Dr. Karnani is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Vitamin D Deficiency, Vaginal Cysts, Vaginal Dryness, and Neuralgia.

    Learn about our expert tiers
    Experienced in Vitamin B12 Deficiency
    Nurse Practitioner
    Experienced in Vitamin B12 Deficiency
    Nurse Practitioner

    Valley Medical Oncology Consultants

    20055 Lake Chabot Rd Ste 130, 
    Castro Valley, CA 
     (1.3 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Kelly Olcott is a Nurse Practitioner in Castro Valley, California. Ms. Olcott is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Vitamin B12 Deficiency, ALK-Positive Non-Small Cell Lung Cancer, and Smoldering Multiple Myeloma.

    Experienced in Vitamin B12 Deficiency
    Hematology
    Experienced in Vitamin B12 Deficiency
    Hematology

    University Healthcare Alliance

    20055 Lake Chabot Rd Ste 130, 
    Castro Valley, CA 
     (1.3 miles away)
    Languages Spoken:
    English

    Byron Wilson is a Hematologist in Castro Valley, California. Dr. Wilson is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Colorectal Cancer, Familial Colorectal Cancer, Prostate Cancer, and Familial Prostate Cancer.

    Experienced in Vitamin B12 Deficiency
    Experienced in Vitamin B12 Deficiency

    University Healthcare Alliance

    20055 Lake Chabot Rd Ste 130, 
    Castro Valley, CA 
     (1.3 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Donald Lombardi is an Oncologist in Castro Valley, California. Dr. Lombardi is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Primary Mediastinal B-Cell Lymphoma (PMBCL), Hemosiderosis, Idiopathic Pulmonary Hemosiderosis, and Inflammatory Breast Cancer.

    Experienced in Vitamin B12 Deficiency
    Hematology
    Experienced in Vitamin B12 Deficiency
    Hematology

    Office

    13851 E 14th St Fl 3, 
    San Leandro, CA 
     (2.9 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Qaiser Niaz is a Hematologist in San Leandro, California. Dr. Niaz is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Colorectal Cancer, Familial Colorectal Cancer, Breast Cancer, and Paget Disease of the Breast.

    Experienced in Vitamin B12 Deficiency
    Experienced in Vitamin B12 Deficiency

    Alameda Health System

    664 Southland Mall, 
    Hayward, CA 
     (3.5 miles away)
    Languages Spoken:
    English

    Srilekha Puranam is a Nephrologist in Hayward, California. Dr. Puranam is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Chronic Kidney Disease, Low Sodium Level, Low Potassium Level, and Glomerulonephritis.

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

    Hayward Pharmacy

    27212 Calaroga Ave, 
    Hayward, CA 
     (4.4 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Nidhi Johri is a primary care provider, practicing in Internal Medicine in Hayward, California. Dr. Johri is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Acrospiroma, Hypertension, Familial Hypertension, and Glucocorticoid-Remediable Aldosteronism.

    Advanced in Vitamin B12 Deficiency
    Family Medicine
    Advanced in Vitamin B12 Deficiency
    Family Medicine
    9140 Alcosta Blvd, Suite D, 
    San Ramon, CA 
     (8.2 miles away)
    Languages Spoken:
    English

    Rajesh Maheshwari is a primary care provider, practicing in Family Medicine in San Ramon, California. Dr. Maheshwari is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Opisthotonos, Muscle Spasms, Tracheitis, and Vitamin D Deficiency.

    Anuja Garg
    Bariatric Medicine
    Bariatric Medicine

    Onestop Aesthetic Travel And Wellness Center

    5924 Stoneridge Dr, Suite 110, 
    Pleasanton, CA 
     (9.6 miles away)
    Experience:
    16+ years
    Languages Spoken:
    Hindi, Punjabi, Spanish, Urdu
    Accepting New Patients

    Dr. Anuja Garg is an Internal Medicine physician practicing in the Bay Area for the last nine years. She is board-certified by the American Board of Internal Medicine. She has been practicing medicine for the last 20 years. She completed her medical school at Lady Hardinge Medical College in New Delhi in 2002. She completed her residency in Internal Medicine from Bronx Lebanon Hospital Center, an affiliate of Albert Einstein College of Medicine in New York, in 2009. She is a member of the American College of Physicians.Dr. Garg is also board-certified in obesity medicine from the American Board of Obesity Medicine and has been a proud member of the Obesity Medicine Association.Dr. Garg has a CDC-recommended Certificate of Travel Health from the International Society of Travel Medicine. She is an active member of the International Society of Travel Medicine.Dr. Garg did her aesthetic training from the American Board of Aesthetic Medicine and has a certificate of training in advanced Aesthetics from the American Board of Aesthetic Medicine. She is well-trained in injections like neuromodulators, derma fillers, and has the right machines and tools to help you achieve the perfect look.Dr. Garg strongly believes that good health is central to living a happy life. She believes that preventive care is an essential part of primary care. She has a special interest in treating chronic diseases like diabetes, thyroid problems, hypertension, and hyperlipidemia. Dr. Garg is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Type 2 Diabetes (T2D), Vitamin D Deficiency, Hypertension, and Glucocorticoid-Remediable Aldosteronism.

    Bryant C. Sheh
    Experienced in Vitamin B12 Deficiency
    Experienced in Vitamin B12 Deficiency

    Dublin Center

    4000 Dublin Blvd., Suite 310, 
    Dublin, CA 
     (11.0 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Bryant Sheh is a Hematologist in Dublin, California. Dr. Sheh is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Inflammatory Breast Cancer, Paget Disease of the Breast, Colorectal Cancer, and Familial Colorectal Cancer. Dr. Sheh is currently accepting new patients.

    Huan T. Ha
    Experienced in Vitamin B12 Deficiency
    Hematology
    Experienced in Vitamin B12 Deficiency
    Hematology

    Fremont Center

    3200 Kearney Street, Building 2, 3rd Floor, 
    Fremont, CA 
     (11.5 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Huan Ha is a Hematologist in Fremont, California. Dr. Ha is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Multiple Myeloma, Pulmonary Embolism, Iron Deficiency Anemia, and Idiopathic Neutropenia. Dr. Ha is currently accepting new patients.

    Distinguished in Vitamin B12 Deficiency
    Internal Medicine
    Distinguished in Vitamin B12 Deficiency
    Internal Medicine

    West Coast Veins And Vascular Inc

    3155 Kearney St Ste 100, 
    Fremont, CA 
     (14.9 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Yahaira Lopez is a primary care provider, practicing in Internal Medicine in Fremont, California. Dr. Lopez is rated as a Distinguished provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Glossitis, Pernicious Anemia, Vitamin B12 Deficiency, and Subacute Combined Degeneration.

    Experienced in Vitamin B12 Deficiency
    Hematology
    Experienced in Vitamin B12 Deficiency
    Hematology

    Epic Care

    27206 Calaroga Ave Ste 208, 
    Hayward, CA 
     (6.8 miles away)
    Languages Spoken:
    English

    Ostap Melnyk is a Hematologist in Hayward, California. Dr. Melnyk is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Colorectal Cancer, Familial Colorectal Cancer, Paget Disease of the Breast, and Breast Cancer.

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

    Office

    12677 Alcosta Blvd Ste 240, 
    San Ramon, CA 
     (6.9 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Shobana Vankipuram is a primary care provider, practicing in Family Medicine in San Ramon, California. Dr. Vankipuram is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Vitamin D Deficiency, Vitamin B12 Deficiency Anemia, Folate Deficiency, and Multiple Carboxylase Deficiency.

    Experienced in Vitamin B12 Deficiency
    Hematology | Oncology
    Experienced in Vitamin B12 Deficiency
    Hematology | Oncology

    Bay Imaging Consultants Medical Group

    6380 Clark Ave, 
    Dublin, CA 
     (8.4 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Bao Dao is a Hematologist and an Oncologist in Dublin, California. Dr. Dao is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Thrombocytopenia, Follicular Lymphoma, Pulmonary Embolism, and Acute Monoblastic Leukemia (AmoL).

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

    Endocrinology Clinic In Danville

    319 Diablo Rd, 
    Danville, CA 
     (9.7 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Priti Parekh is an Internal Medicine provider in Danville, California. Dr. Parekh is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Vitamin D Deficiency, Vitamin B12 Deficiency, Obesity in Children, and Hypertension.

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

    Bay Valley Medical Group Inc.

    319 Diablo Rd Ste 105, 
    Danville, CA 
     (9.7 miles away)
    Experience:
    17+ years
    Languages Spoken:
    English
    Offers Telehealth

    Saket Shah is a primary care provider, practicing in Family Medicine in Danville, California. Dr. Shah has been practicing medicine for over 17 years and is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are High Cholesterol, Vitamin D Deficiency, Hypertension, and Familial Hypertension.

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

    Mark Klebanov MD Corp

    120 La Casa Via Ste 102, 
    Walnut Creek, CA 
     (14.7 miles away)
    Languages Spoken:
    English

    Mark Klebanov is an Endocrinologist in Walnut Creek, California. Dr. Klebanov is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Type 2 Diabetes (T2D), Maturity Onset Diabetes of the Young, Vitamin B12 Deficiency, and Osteoporosis.

    Showing 1-20 of 44

    Last Updated: 02/22/2026

    When should I see a Vitamin B12 Deficiency doctor near Castro Valley, 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 Castro Valley, 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 Castro Valley, 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 Castro Valley, 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 Castro Valley, 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 Castro Valley, 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 Castro Valley, 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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