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

Find the Top Vitamin B12 Deficiency Experts and Specialists

Last Updated: 04/28/2026

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MediFind found 47 doctor with experience in Vitamin B12 Deficiency near Upland, CA. Of these, 42 are Experienced and 5 are Advanced.

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47 providers found
    Experienced in Vitamin B12 Deficiency
    Cardiology
    Experienced in Vitamin B12 Deficiency
    Cardiology

    Office

    685 N 13th Ave Ste 1, 
    Upland,, CA 
     (0.9 miles away)
    Languages Spoken:
    English

    Byung Ahn is a Cardiologist practicing medicine in Upland,, California. Dr. Ahn is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 31 other conditions, according to our data. His clinical expertise encompasses Glucocorticoid-Remediable Aldosteronism, Hypertension, Metabolic Syndrome, Pediatric Myocarditis, and Pacemaker Implantation.

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

    HealthMed Medical Group Inc.

    995 W Foothill Blvd, 
    Claremont, CA 
     (5.0 miles away)
    Languages Spoken:
    English

    Bijan Badihian is a Family Medicine provider practicing medicine in Claremont, California. Dr. Badihian is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His clinical expertise encompasses Menopause and Vitamin B12 Deficiency.

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

    Apex Med Family Healthcare

    99 N San Antonio Ave, 
    Upland, CA 
     (0.8 miles away)
    Experience:
    10+ years
    Languages Spoken:
    English

    Rishi Majithia is a Family Medicine provider practicing medicine in Upland, California. He has been practicing medicine for over 10 years. Dr. Majithia is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His clinical expertise encompasses Vitamin B12 Deficiency. Dr. Majithia is board certified in American Board Of Family Medicine.

    Learn about our expert tiers
    Experienced in Vitamin B12 Deficiency
    Family Medicine
    Experienced in Vitamin B12 Deficiency
    Family Medicine

    Ravinder Singh, Md, Inc.

    525 N 13th Ave, 
    Upland, CA 
     (0.9 miles away)
    Experience:
    27+ years
    Languages Spoken:
    English
    Offers Telehealth

    Ravinder Singh is a primary care provider, practicing in Family Medicine in Upland, California. He has been practicing medicine for over 27 years. Dr. Singh is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 108 other conditions, according to our data. His clinical expertise encompasses Glucocorticoid-Remediable Aldosteronism, Familial Hypertension, Hypertension, Liver Transplant, and Knee Replacement. Dr. Singh is board certified in American Board Of Family Medicine.

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

    Mukesh Amin MD & Tejinder Singh MD Inc.

    914 W Foothill Blvd Ste B, 
    Upland, CA 
     (0.9 miles away)
    Languages Spoken:
    English

    Tejinder Singh is a primary care provider, practicing in Internal Medicine in Upland, California. Dr. Singh is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 14 other conditions, according to our data. His clinical expertise encompasses Type 2 Diabetes (T2D), Osteomyelitis in Children, Hypertension, Thrombectomy, and Gastrostomy.

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

    Michael Chai MD Inc.

    1113 Alta Ave Ste 106, 
    Upland, CA 
     (0.9 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Michael Chai is a primary care provider, practicing in Internal Medicine in Upland, California. Dr. Chai 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 Necrotizing Vasculitis, Small Cell Lung Cancer (SCLC), Lung Cancer, Myringotomy, and Gastrostomy.

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

    The Oncology Institute

    1060 E Foothill Blvd Ste 102, 
    Upland, CA 
     (0.9 miles away)
    Languages Spoken:
    English

    Dustin Stevenson is a Hematologist and an Oncologist practicing medicine in Upland, California. Dr. Stevenson is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 17 other conditions, according to our data. His clinical expertise encompasses Essential Thrombocythemia, Breast Cancer, Colorectal Cancer, and Deep Vein Thrombosis.

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

    Office

    984 W Foothill Blvd Ste E, 
    Upland, CA 
     (0.9 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Michael Benavidez is a Family Medicine provider practicing medicine in Upland, California. Dr. Benavidez is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses Vitamin D Deficiency, Generalized Pustular Psoriasis (GPP), Vitamin B12 Deficiency, and Menopause.

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

    Armour, Richard L., D.O.

    1113 Alta Ave, 
    Upland, CA 
     (1.2 miles away)
    Experience:
    37+ years
    Languages Spoken:
    English

    Richard Armour is a primary care provider, practicing in Family Medicine in Upland, California. He has been practicing medicine for over 37 years. Dr. Armour 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 Inborn Amino Acid Metabolism Disorder, Osteomyelitis in Children, Bronchiolitis Obliterans, and Industrial Bronchitis. Dr. Armour is board certified in American Osteopathic Board Of Family Practice.

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

    Chaparral Medical Group Inc.

    138 Harvard Ave, 
    Claremont, CA 
     (3.9 miles away)
    Languages Spoken:
    English

    Ashok Sharma is a primary care provider, practicing in Internal Medicine in Claremont, California. Dr. Sharma is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 13 other conditions, according to our data. His clinical expertise encompasses Atrial Fibrillation, Obesity, Attenuated Familial Adenomatous Polyposis, and Juvenile Polyposis Syndrome.

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

    Harvey D. Cohen M.D. Inc.

    8330 Red Oak St Ste 201, 
    Rancho Cucamonga, CA 
     (4.0 miles away)
    Experience:
    17+ years
    Languages Spoken:
    English
    Offers Telehealth

    Nyein Tint is a primary care provider, practicing in Internal Medicine in Rancho Cucamonga, California. She has been practicing medicine for over 17 years. Dr. Tint is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. She is also highly rated in 4 other conditions, according to our data. Her clinical expertise encompasses Obesity, Obesity in Children, High Cholesterol, and Vitamin D Deficiency.

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

    Harvey D. Cohen M.D. Inc.

    8330 Red Oak St Ste 201, 
    Rancho Cucamonga, CA 
     (4.0 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Harvey Cohen is a primary care provider, practicing in Internal Medicine in Rancho Cucamonga, California. Dr. Cohen is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 10 other conditions, according to our data. His clinical expertise encompasses Glucocorticoid-Remediable Aldosteronism, Familial Hypertension, Hypertension, and Obesity.

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

    Our Family Medical Group Inc.

    9190 Haven Ave Ste 102, 
    Rancho Cucamonga, CA 
     (4.0 miles away)
    Languages Spoken:
    English

    Hetalben Makwana is a primary care provider, practicing in Internal Medicine in Rancho Cucamonga, California. Dr. Makwana is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. She is also highly rated in 11 other conditions, according to our data. Her clinical expertise encompasses Osteomyelitis in Children, Breast Cancer, Obesity, and High Cholesterol.

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

    Medicor Medical Group, Inc.

    7974 Haven Ave, 
    Rancho Cucamonga, CA 
     (4.2 miles away)
    Experience:
    23+ years
    Languages Spoken:
    English
    Offers Telehealth

    Mark Shiu is a Family Medicine provider practicing medicine in Rancho Cucamonga, California. He has been practicing medicine for over 23 years. Dr. Shiu is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses Vitamin D Deficiency, Vitamin B12 Deficiency, Muscle Spasms, and Menopause. Dr. Shiu is board certified in American Osteopathic Board Of Family Physicians.

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

    Vera Dermatology Inc.

    981 W Foothill Blvd, 
    Claremont, CA 
     (4.9 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Stanley Kim is a Hematologist practicing medicine in Claremont, California. Dr. Kim 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 Activated PI3K Delta Syndrome (APDS), Anemia, Dehydration, and Deep Vein Thrombosis.

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

    HealthMed Medical Group Inc.

    995 W Foothill Blvd, 
    Claremont, CA 
     (5.0 miles away)
    Experience:
    17+ years
    Languages Spoken:
    English
    Offers Telehealth

    Mohitkumar Ardeshana is an Internal Medicine provider practicing medicine in Claremont, California. He has been practicing medicine for over 17 years. Dr. Ardeshana is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His clinical expertise encompasses Opisthotonos, Muscle Spasms, Neuralgia, and Sciatica.

    Advanced in Vitamin B12 Deficiency
    Family Medicine
    Advanced in Vitamin B12 Deficiency
    Family Medicine

    Tuan Dai Le, M.D.

    1151 E Holt Ave, 
    Pomona, CA 
     (5.1 miles away)
    Experience:
    35+ years
    Languages Spoken:
    English

    Tuan Le is a primary care provider, practicing in Family Medicine in Pomona, California. He has been practicing medicine for over 35 years. Dr. Le is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses Vitamin B12 Deficiency, Maturity Onset Diabetes of the Young, Type 2 Diabetes (T2D), and Familial Hypertension. Dr. Le is board certified in American Board Of Family Medicine.

    Advanced in Vitamin B12 Deficiency
    Endocrinology | Internal Medicine
    Advanced in Vitamin B12 Deficiency
    Endocrinology | Internal Medicine

    Chaparral Medical Group, Inc.

    1866 N Orange Grove Ave, 
    Pomona, CA 
     (5.9 miles away)
    Experience:
    33+ years
    Languages Spoken:
    English
    Offers Telehealth

    Ewa Konca is an Internal Medicine specialist and an Endocrinologist practicing medicine in Pomona, California. She has been practicing medicine for over 33 years. Dr. Konca is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. She is also highly rated in 59 other conditions, according to our data. Her clinical expertise encompasses Type 2 Diabetes (T2D), Obesity in Children, Obesity, and Hypothyroidism. Dr. Konca is board certified in American Board Of Internal Medicine.

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

    Chaparral Medical Group Inc.

    790 E Bonita Ave, 
    Pomona, CA 
     (5.1 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Uzma Waraich is a primary care provider, practicing in Internal Medicine in Pomona, California. Dr. Waraich is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. She is also highly rated in 7 other conditions, according to our data. Her clinical expertise encompasses Obesity, Obesity in Children, High Cholesterol, and Type 2 Diabetes (T2D).

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

    Chaparral Medical Group Inc.

    790 E Bonita Ave, 
    Pomona, CA 
     (5.1 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Nallely Flores is a primary care provider, practicing in Family Medicine in Pomona, California. Dr. Flores is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. She is also highly rated in 3 other conditions, according to our data. Her clinical expertise encompasses Obesity, Hepatic Cystic Hamartoma, Caroli Disease, and Sciatica.

    Showing 1-20 of 47

    Last Updated: 04/28/2026

    When should I see a Vitamin B12 Deficiency doctor near Upland, 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 Upland, 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 Upland, 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 Upland, 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 Upland, 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 Upland, 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 Upland, 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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