The 20 Best Vitamin B12 Deficiency Doctors Near Me in San Marcos, CA

Find the Top Vitamin B12 Deficiency Experts and Specialists

Last Updated: 04/28/2026

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MediFind found 30 doctor with experience in Vitamin B12 Deficiency near San Marcos, CA. Of these, 24 are Experienced, 4 are Advanced and 2 are Distinguished.

Location
LocationClose
30 providers found
    Bernard Silver
    Experienced in Vitamin B12 Deficiency
    Experienced in Vitamin B12 Deficiency

    Cleveland Clinic

    400 Craven Rd, 
    San Marcos, CA 
     (1.0 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Bernard Silver is a Hematologist in San Marcos, California. Dr. Silver is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Thrombocytopenia, Autoimmune Hemolytic Anemia, Adult Immune Thrombocytopenia, Embolectomy, and Thrombectomy.

    Advanced in Vitamin B12 Deficiency
    Advanced in Vitamin B12 Deficiency

    CCARE San Marcos Cancer Center

    838 Nordahl Rd Fl 3, 
    San Marcos, CA 
     (1.9 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Edward Mcclay is an Oncologist in San Marcos, California. Dr. Mcclay is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Melanoma, Merkel Cell Carcinoma, Vitamin B12 Deficiency, and Familial Colorectal Cancer. Dr. Mcclay is currently accepting new patients.

    Advanced in Vitamin B12 Deficiency
    Advanced in Vitamin B12 Deficiency

    CCARE San Marcos Cancer Center

    838 Nordahl Rd Fl 3, 
    San Marcos, CA 
     (1.9 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Michael Kosmo is a Hematologist in San Marcos, California. Dr. Kosmo is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Anemia, Breast Cancer, Paget Disease of the Breast, and Drug-Induced Thrombocytopenia. Dr. Kosmo is currently accepting new patients.

    Learn about our expert tiers
    Distinguished in Vitamin B12 Deficiency
    Distinguished in Vitamin B12 Deficiency

    Office

    326 Santa Fe Dr Ste 105, 
    Encinitas, CA 
     (8.1 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Alberto Bessudo is an Oncologist in Encinitas, California. Dr. Bessudo is rated as a Distinguished provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Bone Tumor, Multiple Myeloma, Colorectal Cancer, and Iron Deficiency Anemia.

    Distinguished in Vitamin B12 Deficiency
    Distinguished in Vitamin B12 Deficiency

    California Cancer Associates For Research And Excellence Inc

    16918 Dove Canyon Rd Ste 103, 
    San Diego, CA 
     (9.3 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Laurie Frakes is an Oncologist in San Diego, California. Dr. Frakes is rated as a Distinguished provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Breast Cancer, Paget Disease of the Breast, HER-2 Positive Breast Cancer, and Inflammatory Breast Cancer.

    Experienced in Vitamin B12 Deficiency
    Physician Assistant
    Experienced in Vitamin B12 Deficiency
    Physician Assistant

    Truecare San Marcos Pharmacy

    150 Valpreda Rd, 
    San Marcos, CA 
     (0.6 miles away)
    Languages Spoken:
    English

    Patricia Castillo is a Physician Assistant in San Marcos, California. Ms. Castillo is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top area of expertise is Vitamin B12 Deficiency.

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

    Office

    420 N Twin Oaks Valley Rd # 2352, 
    San Marcos, CA 
     (1.9 miles away)
    Languages Spoken:
    English

    Richard Zachrich is a primary care provider, practicing in Family Medicine in San Marcos, California. Dr. Zachrich is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are High Cholesterol, Hyperlipidemia Type 3, Anemia, and Chronic Cough.

    Experienced in Vitamin B12 Deficiency
    Experienced in Vitamin B12 Deficiency

    California Cancer Associates For Research And Excellence Inc

    838 Nordahl Rd Ste 300, 
    San Marcos, CA 
     (1.9 miles away)
    Experience:
    17+ years
    Languages Spoken:
    English
    Offers Telehealth

    Dawood Findakly is a Hematologist in San Marcos, California. Dr. Findakly 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 Leukocytosis, Essential Thrombocythemia, Vitamin B12 Deficiency, Chronic Myelogenous Leukemia (CML), and Penectomy.

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

    California Cancer Associates

    838 Nordahl Rd Ste 300, 
    San Marcos, CA 
     (1.9 miles away)
    Languages Spoken:
    English

    Patricia Mooney is a Nurse Practitioner in San Marcos, California. Ms. Mooney is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top area of expertise is Vitamin B12 Deficiency.

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

    California Cancer Associates For Research And Excellence Inc

    838 Nordahl Rd, Suite 300, 
    San Marcos, CA 
     (2.8 miles away)
    Languages Spoken:
    English

    Jamila Faiq is a Nurse Practitioner in San Marcos, California. Ms. Faiq is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Vitamin B12 Deficiency and Smoldering Multiple Myeloma.

    Experienced in Vitamin B12 Deficiency
    Experienced in Vitamin B12 Deficiency

    PHMG Hematology/Oncology

    2125 Citracado Pkwy Ste 220, 
    Escondido, CA 
     (3.1 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Muneeb Choudry is an Oncologist in Escondido, California. Dr. Choudry is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Pleuropulmonary Blastoma, Lung Cancer, Non-Small Cell Lung Cancer (NSCLC), and EGFR Positive Lung Cancer.

    Advanced in Vitamin B12 Deficiency
    Hematology | Oncology
    Advanced in Vitamin B12 Deficiency
    Hematology | Oncology

    4S Ranch

    16918 Dove Canyon Rd Ste 103, 
    San Diego, CA 
     (9.3 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Joel Lamon is a Hematologist and an Oncologist in San Diego, California. Dr. Lamon is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Colorectal Cancer, Drug-Induced Thrombocytopenia, Familial Colorectal Cancer, and Breast Cancer. Dr. Lamon is currently accepting new patients.

    Advanced in Vitamin B12 Deficiency
    Advanced in Vitamin B12 Deficiency

    4S Ranch

    16918 Dove Canyon Rd Ste 103, 
    San Diego, CA 
     (9.3 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Steven Eisenberg is an Oncologist in San Diego, California. Dr. Eisenberg is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Breast Cancer, Paget Disease of the Breast, Pleuropulmonary Blastoma, and Myelodysplastic Syndrome (MDS). Dr. Eisenberg is currently accepting new patients.

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

    Office

    704 E Grand Ave, 
    Escondido, CA 
     (5.5 miles away)
    Languages Spoken:
    English

    Victoria Cox is a primary care provider, practicing in Family Medicine in Escondido, California. Dr. Cox is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Orthostatic Hypotension, Maturity Onset Diabetes of the Young, Type 2 Diabetes (T2D), and Obesity in Children.

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

    Melissa Hurd Medical Corp.

    161 Thunder Dr Ste 103, 
    Vista, CA 
     (6.1 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Melissa Hurd is a primary care provider, practicing in Family Medicine in Vista, California. Dr. Hurd 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), Osteoporosis, Postmenopausal Osteoporosis, and Hypertension.

    Experienced in Vitamin B12 Deficiency
    Gastroenterology
    Experienced in Vitamin B12 Deficiency
    Gastroenterology

    North County Gastroenterology Medical Group Inc.

    3923 Waring Rd Ste A, 
    Oceanside, CA 
     (7.8 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Christopher Devereaux is a Gastroenterologist in Oceanside, California. Dr. Devereaux is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Diverticular Disease, Gastroesophageal Reflux Disease (GERD), Gastric Dysmotility, Endoscopy, and Gastrectomy.

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

    Rancho Santa Fe. Medical Group Inc.

    3230 Waring Ct Ste Q, 
    Oceanside, CA 
     (7.8 miles away)
    Languages Spoken:
    English

    Luis Navazo is a primary care provider, practicing in Family Medicine in Oceanside, California. Dr. Navazo is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Ringworm, Stasis Dermatitis and Ulcers, Peptic Ulcer, and Cellulitis.

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

    Julie R. Aspiras, Julie Aspiras, M.D. PC

    3998 Vista Way, 
    Oceanside, CA 
     (7.9 miles away)
    Experience:
    44+ years
    Languages Spoken:
    English
    Offers Telehealth

    Julie Aspiras is an Internal Medicine provider in Oceanside, California. Dr. Aspiras has been practicing medicine for over 44 years and is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Vitamin B12 Deficiency and Vitamin D Deficiency.

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

    Diane L. Hutchison MD Inc.

    477 N El Camino Real Ste D202, 
    Encinitas, CA 
     (8.1 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Diane Hutchison is a primary care provider, practicing in Family Medicine in Encinitas, California. Dr. Hutchison is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Common Cold, Bronchitis, Herpetic Stomatitis, and Gingivostomatitis.

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

    Palomar Health Valley Center Road

    28743 Valley Center Rd, 
    Valley Center, CA 
     (9.7 miles away)
    Languages Spoken:
    English

    Roy Johnson is a primary care provider, practicing in Family Medicine in Valley Center, California. Dr. Johnson is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Hypothyroidism, Postmenopausal Osteoporosis, Osteoporosis, Glucocorticoid-Remediable Aldosteronism, and Gastrostomy.

    Showing 1-20 of 30

    Last Updated: 04/28/2026

    When should I see a Vitamin B12 Deficiency doctor near San Marcos, 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 San Marcos, 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 San Marcos, 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 San Marcos, 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 San Marcos, 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 San Marcos, 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 San Marcos, 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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