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Best Vitamin B12 Test Doctors Worldwide — TOP 8

Content meets the Bookimed Editorial Policy and is medically reviewed by

Fahad Mawlood

Akif Nuri Dogan

  • 4.6 Excellent 239 reviews
  • 24 years of experience
  • Turkey, Istanbul, Hisar Hospital Intercontinental
  • Dr. Akif Nuri Dogan investigates chronic fatigue and metabolic issues at Hisar Hospital Intercontinental. His vitamin B12 test identifies underlying causes of low energy and tiredness.

    • Internal medicine specialist trained at Istanbul University Cerrahpaşa Faculty of Medicine
    • Expert in differential diagnosis – distinguishes between complex internal health conditions
    • Focuses on metabolic health – treats diabetes, obesity, and blood pressure issues
    • Former specialist at Antalya Training and Research Hospital and Elazig Military Hospital
    • Residency at Bezm-i Alem Vakıf Gureba – a major Turkish teaching hospital
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Suleyman Hilmi Aksoy

  • 4.6 Excellent 239 reviews
  • 24 years of experience
  • accreditations:
  • Turkey, Istanbul, Hisar Hospital Intercontinental
  • Dr. Suleyman Hilmi Aksoy is a radiologist at Hisar Hospital Intercontinental in Istanbul. He specializes in diagnostic radiology, teleradiology, and interventional radiology. Dr. Aksoy previously held an Assistant Professorship at the Istanbul University Radiology Department. He has contributed to 13 medical congresses with numerous oral and written presentations.

    • Member of the European Society of Radiology and the International Society of Radiology.
    • Holds certifications from the Turkish Society of Interventional Radiology.
    • Performs diagnostic procedures like angiography, CT scans, and biopsies.
    • Works at a JCI-accredited hospital that treats over 500,000 patients annually.
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Selami Aydin

  • 4.6 Excellent 239 reviews
  • 25 years of experience
  • Turkey, Istanbul, Hisar Hospital Intercontinental
  • Dr. Selami Aydin is an internal medicine specialist at Hisar Hospital Intercontinental. He integrates the Vitamin B12 test into metabolic screenings for chronic conditions.

    • Trained at Kocaeli University Faculty of Medicine – a respected Turkish medical institution
    • Treats metabolic issues including diabetes, obesity, and lipid disorders
    • Manages thyroid and rheumatic diseases that affect nutrient absorption
    • Evaluates gastric and intestinal health to identify B12 deficiency causes
    • Consults on obesity and chronic disease at a JCI-accredited facility
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Nurettin Demirkol

  • 4.6 Excellent 239 reviews
  • 43 years of experience
  • Turkey, Istanbul, Hisar Hospital Intercontinental
  • Dr. Nurettin Demirkol is an internal medicine specialist at Hisar Hospital Intercontinental. He conducts metabolic screenings including the vitamin B12 test to locate root causes of disease.

    • Holds a Master degree in Health Management from Okan University
    • Completed internal medicine residency at the prestigious Istanbul University Faculty of Medicine
    • Participated in 20 national medical congresses to stay current on clinical standards
    • Specializes in etiology studies – the investigation of why specific medical conditions develop
    • Experienced in treating metabolic disorders that affect nutrient absorption and health
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Fatma Kural Aydin

  • 4.6 Excellent 239 reviews
  • 28 years of experience
  • Turkey, Istanbul, Hisar Hospital Intercontinental
  • Dr. Fatma Kural Aydin is an internal medicine specialist at Hisar Hospital Intercontinental. She focuses on metabolic diseases and long-term monitoring including Vitamin B12 testing.

    • Treats endocrine and metabolic disorders like hormonal imbalances and thyroid issues
    • Conducts specialized health screenings for early detection of chronic internal diseases
    • Trained at Istanbul University Cerrahpasa Faculty of Medicine
    • Uses laboratory diagnostics like lipid profiles and blood sugar monitoring
    • Interprets abdominal ultrasounds and lung function tests for accurate diagnosis
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Nesrin Bastug

  • 4.1 Good 42 reviews
  • 29 years of experience
  • Turkey, Istanbul, Emsey Hospital
  • Dr. Nesrin Bastug leads the IVF unit at Emsey Hospital. She integrates essential nutrient monitoring, such as the Vitamin B12 test, into fertility and pregnancy care.

    • Specialist in gynecology and obstetrics since finishing her training at Zeynep Kamil Hospital
    • Supervises the In Vitro Fertilization (IVF) division at Emsey Hospital
    • Trained at Ege University Faculty of Medicine
    • Focuses on nutritional health for women during reproductive planning
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Find out about the best Vitamin B12 Test doctors here

20 top ranked Vitamin B12 Test doctors in the world are represented on this page. The list includes only verified specialists known for their experience and high success rates.

The ranking is composed according to the Bookimed patient reviews and considers the rate of hospitals where doctors practice.

Top 5 Vitamin B12 Test doctors on Bookimed.com:

How to choose the best Vitamin B12 Test doctor in the world?

The specialist's CV contains details about doctor's expertise and work experience, education, scientific research, and languages spoken. Compare information on several specialists, read carefully about their experience, success rates and methods they apply. Make sure the chosen doctor has a relevant experience in the treatment of a medical issue you are looking for. Read reviews of patients who had a consultation with the chosen specialist.

Famous Vitamin B12 Test doctors have vast experience, continue education constantly, participate in professional associations and have positive feedback from patients treated.

What is the cost of a Vitamin B12 Test doctor's consultation?

The price for the consultation on Vitamin B12 Test varies between experts and depends on some factors as:

  • the country of practicing
  • the clinical experience and reputation
  • the medical degree and educational background
  • the doctor's workload
  • medical developments, proprietary techniques used, and awards if any.

How to make an appointment with a chosen Vitamin B12 Test doctor?

To schedule your visit, just submit a request on Bookimed.com. Our coordinator will contact you to discuss the time and details of the appointment, so everything will go fast and comfortable.

We can help to find the right Vitamin B12 Test doctor if you have any difficulties with a choice. Bookimed services are free for patients ♥

Where you go for Vitamin B12 Test

Maksim Sazonov

  • 5 Excellent 1 review
  • 21 years of experience
  • Ukraine, Kharkiv, ON Clinic Kharkiv Gagarina
  • Dr. Maksim Sazonov is a surgeon and endocrinologist with a Ph.D. in Medicine. He provides specialty care at ON Clinic Kharkiv Gagarina.

    • Holds a Ph.D. in Medicine for advanced research and clinical knowledge
    • Practices in endocrinology to help patients with hormone and nutrient imbalances
    • Identifies signs of deficiency during Vitamin B12 test reviews
    • Member of the European Association of Surgeons – follows international clinical standards
    • Specializes in oncology and general surgery for complex patient health screenings
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Niko Mihic

  • 27 years of experience
  • Spain, Madrid, Hospital Universitario HM Sanchinarro
  • Dr. Niko Mihic leads medical services for Real Madrid and the European Space Agency. This role involves specialized metabolic blood testing including Vitamin B12 tests.

    • Chief of Executive Health at Hospital Universitario HM Sanchinarro
    • Directs the Personalized Early Prevention Unit focusing on diagnostic accuracy
    • National Consulting Physician in Spain for Air France and KLM airlines
    • Medical trainer and instructor at St. Pablo CEU Medical School
    • Trained in family medicine at Laval University and University of Montreal
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Choosing the Right Doctor and Clinic: Insider Tips

When selecting a doctor or clinic, keep these key points in mind:
Check credentials
Verify certifications from bodies like ISAPS, JCI, or relevant medical boards
Review success rates
Choose doctors with solid experience and a proven track record in your specific treatment.
Read patient reviews
Browse Bookimed reviews from real patients to learn about their experiences.
Ensure effective communication
Pick clinics that offer language support for a smooth treatment process.
Ask about services
Confirm whether the price includes services such as accommodation, local transfers, and follow-up care to avoid hidden costs.
Choosing a clinic abroad can be stressful. At Bookimed, with over 800K patients helped, we understand your concerns. We know how to find trusted doctors, the best price-quality options, and solutions for even complex cases. We’re here to guide you every step of the way.
Yan Matsiivskiy
Head of Medical Coordinator Team

Bookimed Insights: Top Vitamin B12 Test Specialists in the World (2026)

Bookimed has coordinated 895221 requests for Vitamin B12 Test globally, collaborating with 8 top-rated specialists. The doctors in this table are selected based on their international credentials, clinical expertise, and patient outcomes. The 2026 global ranking is formed using verified data from actual patient cases and current programs from our partner clinics.
RankDoctorexperienceGood Fit ForWhat Sets Them ApartClinic & LocationConsultation
#124 years of experienceChronic fatigue and metabolic health assessmentDr. Dogan specializes in investigating underlying causes of low energy. He uses his background in metabolic health and differential diagnosis from top Turkish teaching hospitals to create long-term monitoring plans for his patients.
Turkey
Price on request
#225 years of experienceMetabolic screening for chronic diseasesSpecializes in internal medicine at Hisar Hospital Intercontinental. Focuses on obesity, diabetes, and intestinal health. Trained at Kocaeli University. Expert in managing complex chronic conditions.
Turkey
Price on request
#343 years of experienceMetabolic health screening and nutritional deficiency investigationInternal medicine specialist at Hisar Hospital Intercontinental. He holds a Master degree in Health Management. Dr. Demirkol has participated in 20 national medical congresses. He specializes in identifying root causes of metabolic disorders.
Turkey
Price on request
#428 years of experienceMetabolic health monitoring and diagnostic screeningsDr. Aydin specializes in endocrine and metabolic diseases at Hisar Hospital Intercontinental. She provides differential diagnosis for chronic conditions. She earned her medical degree and completed residency at Istanbul University.
Turkey
Price on request
#529 years of experienceFertility-related Vitamin B12 monitoringLeads the IVF unit at Emsey Hospital. She combines obstetric expertise with nutrient testing to support reproductive health. Specialist training from Zeynep Kamil Research and Education Hospital.
Turkey
from $110
#621 years of experienceMetabolic and endocrine health screeningsDr. Sazonov holds a Ph.D. in Medicine and specializes in endocrinology. He is a member of the European Association of Surgeons. He applies high clinical standards to nutrient and hormone evaluations.
Ukraine
Price on request
#727 years of experienceMetabolic and nutritional screening for high-performance athletesHeads medical services for Real Madrid. Dr. Mihic provides medical expertise to the European Space Agency. He specializes in comprehensive metabolic blood testing and preventive health programs for executive patients.
Spain
Price on request