The 20 Best Vitamin B12 Deficiency Doctors Near Me in Commack, NY

Find the Top Vitamin B12 Deficiency Experts and Specialists

Last Updated: 02/22/2026

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MediFind found 209 doctor with experience in Vitamin B12 Deficiency near Commack, NY. Of these, 180 are Experienced, 27 are Advanced and 2 are Distinguished.

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209 providers found
    Distinguished in Vitamin B12 Deficiency
    Endocrinology
    Distinguished in Vitamin B12 Deficiency
    Endocrinology
    6080 Jericho Turnpike, 
    Commack, NY 
     (0.7 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Edward Condon is an Endocrinologist in Commack, New York. Dr. Condon is rated as a Distinguished provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Hashimoto Thyroiditis, Polycystic Ovary Syndrome, Obesity in Children, and Infertility.

    Distinguished in Vitamin B12 Deficiency
    Endocrinology
    Distinguished in Vitamin B12 Deficiency
    Endocrinology

    Endocrine Associates Of Long Island PC

    732 Smithtown Byp Ste 103, 
    Smithtown, NY 
     (4.3 miles away)
    Experience:
    44+ years
    Languages Spoken:
    English

    David Kugler is an Endocrinologist in Smithtown, New York. Dr. Kugler 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 Hashimoto Thyroiditis, Type 2 Diabetes (T2D), Vitamin B12 Deficiency, and Idiopathic Hypercalciuria.

    Advanced in Vitamin B12 Deficiency
    Endocrinology
    Advanced in Vitamin B12 Deficiency
    Endocrinology

    Endocrine Associates Of Long Island PC

    732 Smithtown Byp Ste 103, 
    Smithtown, NY 
     (4.3 miles away)
    Languages Spoken:
    English

    Michael Shanik is an Endocrinologist in Smithtown, New York. Dr. Shanik is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Thyroid Nodule, Hashimoto Thyroiditis, Type 2 Diabetes (T2D), and Adrenal Gland Adenoma.

    Learn about our expert tiers
    Experienced in Vitamin B12 Deficiency
    Experienced in Vitamin B12 Deficiency
    5 Cuba Hill Road, 
    Greenlawn, NY 
     (3.9 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    I am a community based cardiologist with an interest in preventive cardiology. At out office, we are able to do stress testing, echocardiography, holter and blood pressure monitors, and laboratory work.I believe in treating the whole patient, not just the heart.I believe that part of my job is to be an advocate for my patient, making sure that they get the best care possible.I work with three other cardiologists so there is always someone available in case of emergency. Dr. Neumann is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Sitosterolemia, High Cholesterol, Hypertension, and Glucocorticoid-Remediable Aldosteronism.

    Alexander M. O'connell
    Experienced in Vitamin B12 Deficiency
    Internal Medicine
    Experienced in Vitamin B12 Deficiency
    Internal Medicine
    5 Cuba Hill Road, 
    Greenlawn, NY 
     (3.9 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Alexander O'connell is a primary care provider, practicing in Internal Medicine in Greenlawn, New York. Dr. O'connell 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, Hypothyroidism, and Familial Hypertension.

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

    Sports Physical Therapy Occupational Therapy And Rehabilitation Servic

    222 E Main St Ste 103, 
    Smithtown, NY 
     (4.3 miles away)
    Languages Spoken:
    English

    Martha Tsarkalis is a primary care provider, practicing in Family Medicine in Smithtown, New York. Dr. Tsarkalis is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Long Haul COVID, Hypertensive Heart Disease, Enlarged Liver, and Vitamin B12 Deficiency.

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

    Northwell Health Cancer Institute At Huntington

    270 Pulaski Road, Suite D, 
    Greenlawn, NY 
     (5.2 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Sadia Riaz is a Hematologist Oncology specialist and a Hematologist in Greenlawn, New York. Dr. Riaz is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Non-Hodgkin Lymphoma, Anemia, Gastric Lymphoma, Thrombotic Thrombocytopenic Purpura, and Bone Marrow Aspiration.

    Kenneth D. Gold
    Experienced in Vitamin B12 Deficiency
    Hematology | Oncology | Internal Medicine
    Experienced in Vitamin B12 Deficiency
    Hematology | Oncology | Internal Medicine

    Northwell Health Imbert Cancer Center

    440 East Main Street, 
    Bay Shore, NY 
     (8.7 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Kenneth D. Gold, MD joined Northwell Health Physician Partners and the Northwell Health Cancer Institute as an attending physician of the Department of Medicine.Kenneth D. Gold, MD graduated magna cum laude from Amherst College. He earned his medical degree at Baylor College of Medicine in Houston, Texas, and then trained in Internal Medicine at George Washington University, where he also served as Chief Medical Resident. His fellowship in Hematology and Medical Oncology was completed at Columbia Presbyterian Medical Center. Dr. Gold is board-certified in Internal medicine, Hematology and medical Oncology.Previously Chief of Hematology and Medical Oncology at Good Samaritan Hospital, West Islip, and an attending physician at Southside Hospital, Dr. Gold has been a leader in Suffolk County in the diagnosis and treatment of cancer and blood diseases since 1983. He served for many years as the Chair of the Transfusion Committees at both Good Samaritan Hospital Medical Center and Southside Hospital. Dr. Gold is a member of the American Society of Clinical Oncology. Dr. Gold is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Small Cell Lung Cancer (SCLC), Pleuropulmonary Blastoma, Lung Cancer, and Inflammatory Breast Cancer.

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

    Island Medical Care, PC

    6277 Jericho Tpke, 
    Commack, NY 
     (0.6 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Christina Zaccara is a Nurse Practitioner in Commack, New York. Ms. Zaccara is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Vitamin D Deficiency and Vitamin B12 Deficiency.

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

    Chspp-Catholic Health Services Physician

    500 Commack Rd Unit 150D, 
    Commack, NY 
     (0.7 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Rohit Gautam is a primary care provider, practicing in Internal Medicine in Commack, New York. Dr. Gautam is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Thrombocytopenia, Osteoarthritis, Anemia, and Chronic Cough.

    Experienced in Vitamin B12 Deficiency
    Nephrology
    Experienced in Vitamin B12 Deficiency
    Nephrology

    Office

    283 Commack Rd Ste 200, 
    Commack, NY 
     (0.7 miles away)
    Languages Spoken:
    English

    Paul Berger is a primary care provider, practicing in Nephrologist in Commack, New York. Dr. Berger is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Tracheitis, Hypertension, Glucocorticoid-Remediable Aldosteronism, and Familial Hypertension.

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

    Chspp-Catholic Health Services Physician

    500 Commack Rd Unit 150D, 
    Commack, NY 
     (0.7 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Farzana Aziz is a primary care provider, practicing in Internal Medicine in Commack, New York. Dr. Aziz is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Sitosterolemia, Hypertension, Familial Hypertension, and Glucocorticoid-Remediable Aldosteronism.

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

    Office

    283 Commack Rd Ste 200, 
    Commack, NY 
     (0.7 miles away)
    Languages Spoken:
    English

    Jacques Schmid is a Gastroenterologist in Commack, New York. Dr. Schmid is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Gastroesophageal Reflux Disease (GERD), Irritable Bowel Syndrome (IBS), Emphysema, Vitamin D Deficiency, and Gastrectomy.

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

    St. Catherine Of Siena Diagnostic Imaging

    500 Commack Rd, 
    Commack, NY 
     (1.4 miles away)
    Languages Spoken:
    English

    Grace Reina is a primary care provider, practicing in Internal Medicine in Commack, New York. Dr. Reina is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Hypothyroidism, Obesity in Children, Childhood Iron Deficiency Anemia, and Infant Hyperglycemia.

    Experienced in Vitamin B12 Deficiency
    Registered Nurse
    Experienced in Vitamin B12 Deficiency
    Registered Nurse

    Kings Park Medicine PC

    93 Main St Ste A, 
    Kings Park, NY 
     (3.7 miles away)
    Languages Spoken:
    English

    Elana Coscetta is a Registered Nurse provider in Kings Park, New York. Dr. Coscetta 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
    Internal Medicine
    Experienced in Vitamin B12 Deficiency
    Internal Medicine

    Angel Garcia JR DPT

    33 Walt Whitman Rd Ste 240, 
    Huntington Station, NY 
     (4.1 miles away)
    Languages Spoken:
    English

    Leslie Cespedes is a primary care provider, practicing in Internal Medicine in Huntington Station, New York. Dr. Cespedes is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Cirrhosis, Familial Combined Hyperlipidemia, Xanthoma, and Vitamin D Deficiency.

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

    Sports Physical Therapy Occupational Therapy And Rehabilitation Servic

    222 E Main St Ste 103, 
    Smithtown, NY 
     (4.3 miles away)
    Languages Spoken:
    English

    Sophia Boulukos is a primary care provider, practicing in Internal Medicine in Smithtown, New York. Dr. Boulukos is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Long Haul COVID, Hypertensive Heart Disease, Enlarged Liver, and Vitamin B12 Deficiency.

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

    Long Island Gastroenterology And Liver Disease PC

    48 Route 25A Ste 307, 
    Smithtown, NY 
     (4.3 miles away)
    Languages Spoken:
    English

    Zvi Alpern is a Gastroenterologist in Smithtown, New York. Dr. Alpern is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Barrett Esophagus, Cowden Syndrome, Peutz-Jeghers Syndrome, Gastrectomy, and Colonoscopy.

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

    Empire Medicine & Rehabilitation

    45 Terry Rd Ste B, 
    Smithtown, NY 
     (4.3 miles away)
    Languages Spoken:
    English

    Deborah Blenner is a primary care provider, practicing in Internal Medicine in Smithtown, New York. Dr. Blenner is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Type B Insulin Resistance Syndrome, Abdominal Obesity Metabolic Syndrome, Mitochondrial Complex V Deficiency, and Cytochrome C Oxidase Deficiency.

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

    Mount Sinai Doctors Laboratory

    5 Cuba Hill Rd, 
    Greenlawn, NY 
     (4.3 miles away)
    Languages Spoken:
    English

    Mark Singer is a primary care provider, practicing in Internal Medicine in Greenlawn, New York. Dr. Singer is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Vitamin D Deficiency, Sitosterolemia, High Cholesterol, and Hypothyroidism.

    Showing 1-20 of 209

    Last Updated: 02/22/2026

    When should I see a Vitamin B12 Deficiency doctor near Commack, NY?

    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 Commack, NY?

    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 Commack, NY?

    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 Commack, NY?

    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 Commack, NY?

    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 Commack, NY?

    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 Commack, NY?

    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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