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

Find the Top Vitamin D Deficiency Experts and Specialists

Last Updated: 04/28/2026

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MediFind found 220 doctor with experience in Vitamin D Deficiency near San Marcos, CA. Of these, 209 are Experienced and 11 are Advanced.

Location
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220 providers found
    Experienced in Vitamin D Deficiency
    Rheumatology
    Experienced in Vitamin D Deficiency
    Rheumatology

    Kayal Medical Group Inc.

    960 W San Marcos Blvd Ste 210, 
    San Marcos, CA 
     (2.0 miles away)
    Languages Spoken:
    English

    Basma Nahlawi is a Rheumatologist practicing medicine in San Marcos, California. Dr. Nahlawi is rated as an Experienced provider by MediFind in the treatment of Vitamin D Deficiency. She is also highly rated in 17 other conditions, according to our data. Her clinical expertise encompasses Rheumatoid Arthritis (RA), MASS Phenotype, Mixed Connective Tissue Disease, and Psoriatic Arthritis.

    Experienced in Vitamin D Deficiency
    Experienced in Vitamin D Deficiency

    Balboa Nephrology - Escondido

    1955 Citracado Pkwy, 
    Escondido, CA 
     (3.4 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Joshua Greenstein is a Nephrologist practicing medicine in Escondido, California. Dr. Greenstein is rated as an Experienced provider by MediFind in the treatment of Vitamin D Deficiency. He is also highly rated in 12 other conditions, according to our data. His clinical expertise encompasses End-Stage Renal Disease (ESRD), Chronic Kidney Disease, Acute Kidney Failure, and Nephrosclerosis. Dr. Greenstein is currently accepting new patients.

    Advanced in Vitamin D Deficiency
    Internal Medicine
    Advanced in Vitamin D Deficiency
    Internal Medicine

    John H. Clancy, Do And Tara Leigh Clancy Do Medical Corporation

    2375 S Melrose Dr, 
    Vista, CA 
     (4.4 miles away)
    Experience:
    32+ years
    Languages Spoken:
    English

    John Clancy is a primary care provider, practicing in Internal Medicine in Vista, California. He has been practicing medicine for over 32 years. Dr. Clancy is rated as an Advanced provider by MediFind in the treatment of Vitamin D Deficiency. He is also highly rated in 10 other conditions, according to our data. His clinical expertise encompasses Fifth Disease, Diabetic Neuropathy, Herpetic Stomatitis, and Gingivostomatitis.

    Learn about our expert tiers
    Advanced in Vitamin D Deficiency
    Family Medicine
    Advanced in Vitamin D Deficiency
    Family Medicine

    Office

    1954 Via Ctr # B, 
    Vista, CA 
     (4.5 miles away)
    Languages Spoken:
    English

    Ma Belen is a Family Medicine provider practicing medicine in Vista, California. Dr. Belen is rated as an Advanced provider by MediFind in the treatment of Vitamin D Deficiency. She is also highly rated in 1 other condition, according to our data. Her clinical expertise encompasses Vitamin D Deficiency and Muscle Spasms.

    Experienced in Vitamin D Deficiency
    Endocrinology
    Experienced in Vitamin D Deficiency
    Endocrinology

    North County Endocrine Medical Group

    625 Citracado Pkwy, 
    Escondido, CA 
     (6.2 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Timothy Bailey is an Endocrinologist practicing medicine in Escondido, California. Dr. Bailey is rated as an Experienced provider by MediFind in the treatment of Vitamin D Deficiency. He is also highly rated in 47 other conditions, according to our data. His clinical expertise encompasses Low Blood Sugar, Type 1 Diabetes (T1D), Type 2 Diabetes (T2D), and Maturity Onset Diabetes of the Young.

    Experienced in Vitamin D Deficiency
    Internal Medicine
    Experienced in Vitamin D Deficiency
    Internal Medicine

    Truecare

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

    Izabela Witczak is a primary care provider, practicing in Internal Medicine in San Marcos, California. Dr. Witczak is rated as an Experienced provider by MediFind in the treatment of Vitamin D Deficiency. She is also highly rated in 7 other conditions, according to our data. Her clinical expertise encompasses Type 2 Diabetes (T2D), Maturity Onset Diabetes of the Young, Osteomyelitis in Children, and Hypertension.

    Experienced in Vitamin D Deficiency
    Internal Medicine
    Experienced in Vitamin D Deficiency
    Internal Medicine

    Truecare

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

    Samuel Poniachik is a primary care provider, practicing in Internal Medicine in San Marcos, California. Dr. Poniachik is rated as an Experienced provider by MediFind in the treatment of Vitamin D Deficiency. He is also highly rated in 17 other conditions, according to our data. His clinical expertise encompasses Myelitis, AIDS Dementia Complex, HIV/AIDS, and AIDS Dysmorphic Syndrome.

    Experienced in Vitamin D Deficiency
    Family Medicine
    Experienced in Vitamin D Deficiency
    Family Medicine

    Truecare

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

    Julie Matias is a primary care provider, practicing in Family Medicine in San Marcos, California. Dr. Matias is rated as an Experienced provider by MediFind in the treatment of Vitamin D Deficiency. Her clinical expertise encompasses Type 2 Diabetes (T2D), Maturity Onset Diabetes of the Young, Obesity in Children, and Chronic Pain.

    Experienced in Vitamin D Deficiency
    Physician Assistant
    Experienced in Vitamin D Deficiency
    Physician Assistant
    150 Valpreda Rd, 
    San Marcos, CA 
     (0.6 miles away)
    Languages Spoken:
    English

    Claudia Salazar is a Physician Assistant practicing medicine in San Marcos, California. Ms. Salazar is rated as an Experienced provider by MediFind in the treatment of Vitamin D Deficiency. Her clinical expertise encompasses Vitamin D Deficiency and Seasonal Affective Disorder (SAD).

    Experienced in Vitamin D Deficiency
    Family Medicine
    Experienced in Vitamin D Deficiency
    Family Medicine

    Scripps Coastal Medical Center San Marcos

    111 Campus Way Ste 301, 
    San Marcos, CA 
     (0.6 miles away)
    Experience:
    10+ years
    Languages Spoken:
    English
    Offers Telehealth

    Zariah Chappell is a primary care provider, practicing in Family Medicine in San Marcos, California. She has been practicing medicine for over 10 years. Dr. Chappell is rated as an Experienced provider by MediFind in the treatment of Vitamin D Deficiency. Her clinical expertise encompasses Vitamin D Deficiency.

    Experienced in Vitamin D Deficiency
    Family Medicine
    Experienced in Vitamin D Deficiency
    Family Medicine

    Scripps Coastal Medical Center San Marcos

    111 Campus Way Ste 301, 
    San Marcos, CA 
     (0.6 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Imran Ahmed is a primary care provider, practicing in Family Medicine in San Marcos, California. Dr. Ahmed is rated as an Experienced provider by MediFind in the treatment of Vitamin D Deficiency. His clinical expertise encompasses Chronic Pain, Hypertension, Glucocorticoid-Remediable Aldosteronism, and Familial Hypertension.

    Experienced in Vitamin D Deficiency
    General Surgery
    Experienced in Vitamin D Deficiency
    General Surgery

    Cleveland Clinic

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

    Pooja Varman is a General Surgeon practicing medicine in San Marcos, California. Dr. Varman is rated as an Experienced provider by MediFind in the treatment of Vitamin D Deficiency. Her clinical expertise encompasses Vitamin D Deficiency.

    Experienced in Vitamin D Deficiency
    General Surgery
    Experienced in Vitamin D Deficiency
    General Surgery

    Cleveland Clinic

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

    Andrew Strong is a General Surgeon practicing medicine in San Marcos, California. Dr. Strong is rated as an Experienced provider by MediFind in the treatment of Vitamin D Deficiency. He is also highly rated in 19 other conditions, according to our data. His clinical expertise encompasses Gastroparesis, Hernia, Superior Mesenteric Artery Syndrome (SMAS), Gastrectomy, and Gastric Bypass.

    Experienced in Vitamin D Deficiency
    Gastroenterology
    Experienced in Vitamin D Deficiency
    Gastroenterology

    Cleveland Clinic

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

    Carlos Simons is a Gastroenterologist practicing medicine in San Marcos, California. Dr. Simons is rated as an Experienced provider by MediFind in the treatment of Vitamin D Deficiency. He is also highly rated in 8 other conditions, according to our data. His clinical expertise encompasses Gallbladder Disease, Jaundice, Banti's Syndrome, Gastric Bypass, and Endoscopy.

    Experienced in Vitamin D Deficiency
    Transplant Surgery
    Experienced in Vitamin D Deficiency
    Transplant Surgery

    Cleveland Clinic

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

    Alvin Wee is a Transplant Surgeon practicing medicine in San Marcos, California. Dr. Wee is rated as an Experienced provider by MediFind in the treatment of Vitamin D Deficiency. He is also highly rated in 10 other conditions, according to our data. His clinical expertise encompasses Polycystic Kidney Disease, Autosomal Dominant Polycystic Kidney Disease, End-Stage Renal Disease (ESRD), Kidney Transplant, and Nephrectomy.

    Experienced in Vitamin D Deficiency
    Experienced in Vitamin D Deficiency

    Cleveland Clinic

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

    Yuliya Sharakova is a Nephrologist practicing medicine in San Marcos, California. Dr. Sharakova is rated as an Experienced provider by MediFind in the treatment of Vitamin D Deficiency. She is also highly rated in 14 other conditions, according to our data. Her clinical expertise encompasses Acute Kidney Failure, Glomerulonephritis, Acute Tubular Necrosis, and Low Sodium Level.

    Experienced in Vitamin D Deficiency
    Experienced in Vitamin D 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 practicing medicine in San Marcos, California. Dr. Mcclay is rated as an Experienced provider by MediFind in the treatment of Vitamin D Deficiency. He is also highly rated in 39 other conditions, according to our data. His clinical expertise encompasses Melanoma, Merkel Cell Carcinoma, Vitamin B12 Deficiency, and Familial Colorectal Cancer. Dr. Mcclay is currently accepting new patients.

    Experienced in Vitamin D Deficiency
    Internal Medicine
    Experienced in Vitamin D Deficiency
    Internal Medicine

    Neighborhood Healthcare

    2085 Montiel Rd Ste 102, 
    San Marcos, CA 
     (1.9 miles away)
    Languages Spoken:
    English

    Arturo Tolentino is an Internal Medicine provider practicing medicine in San Marcos, California. Dr. Tolentino is rated as an Experienced provider by MediFind in the treatment of Vitamin D Deficiency. His clinical expertise encompasses Vitamin D Deficiency, Liver Failure, Gallbladder Disease, Endoscopy, and Gastrostomy.

    Experienced in Vitamin D Deficiency
    Experienced in Vitamin D Deficiency

    Office

    150 Valpreda Rd Ste 105, 
    San Marcos, CA 
     (1.9 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Maria Sebiane is a Pediatrics provider practicing medicine in San Marcos, California. Dr. Sebiane is rated as an Experienced provider by MediFind in the treatment of Vitamin D Deficiency. She is also highly rated in 1 other condition, according to our data. Her clinical expertise encompasses Obesity in Children, Developmental Dysphasia Familial, Vitamin D Deficiency, and Familial Short Stature (FSS). Dr. Sebiane is currently accepting new patients.

    Experienced in Vitamin D Deficiency
    Family Medicine
    Experienced in Vitamin D 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 D Deficiency. He is also highly rated in 4 other conditions, according to our data. His clinical expertise encompasses High Cholesterol, Hyperlipidemia Type 3, Anemia, and Chronic Cough.

    Showing 1-20 of 220

    Last Updated: 04/28/2026

    What is the definition of Vitamin D Deficiency?

    Vitamin D deficiency is when the body does not have enough vitamin D. Vitamin D is necessary for absorbing calcium and healthy bones.

    When should I see a Vitamin D 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 D 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 D 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 D 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 D 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 D Deficiency doctor search results page. 

    Why is it important to get a second opinion from a different Vitamin D 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 D 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 D 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 D 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 D Deficiency doctors near San Marcos, CA?

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

    Look for the filter feature on the left-side of the Vitamin D 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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