Dr. Bayartsetseg Gantulga

Dr. Bayartsetseg Gantulga is a senior physician at State Third Central Hospital in Ulaanbaatar, one of Mongolia's main public referral hospitals. With 14 years of internal medicine experience, she specializes in hepatology and infectious diseases — reflecting Mongolia's significant burden of hepatitis B and C, which drives one of the world's highest rates of liver cancer.

Dr. Bayartsetseg trained at the Health Sciences University of Mongolia before completing her specialist training in internal medicine. Mongolia has a very high prevalence of hepatitis B — estimated at over 10% of the population — and a correspondingly high burden of liver cirrhosis and hepatocellular carcinoma, making hepatology a critical clinical subspecialty.

She also manages the full range of general internal medicine conditions prevalent in Mongolia, including tuberculosis, diabetes, hypertension, and cardiovascular risk factors worsened by Mongolia's distinctive lifestyle factors including high meat consumption, extreme cold, and limited access to fresh produce in rural and semi-urban populations.

Dr. Bayartsetseg has participated in international hepatitis treatment programs supported by WHO and the Mongolian government's national hepatitis treatment initiative, which has expanded access to direct-acting antiviral therapy for hepatitis C.

Dr. Bayartsetseg earned her MD from the Health Sciences University of Mongolia. She completed her internal medicine residency and specialist training at State Third Central Hospital and holds Specialist certification in Internal Medicine.

She obtained a Certificate in Hepatology through training programs supported by international hepatology and gastroenterology associations, including programs in South Korea and Japan. Her Russian language proficiency reflects Mongolia's Soviet-era educational heritage, and she has participated in Russian medical education exchange programs.

Dr. Bayartsetseg's hepatology practice focuses on viral hepatitis (B and C), liver cirrhosis management including complications (ascites, variceal bleeding, hepatic encephalopathy), and early hepatocellular carcinoma surveillance. She coordinates antiviral therapy for hepatitis B and C and performs liver biopsy for disease staging.

In infectious diseases, she manages tuberculosis (pulmonary and extrapulmonary), brucellosis — common in Mongolia's pastoral population — and other endemic infections. General internal medicine covers diabetes mellitus, hypertension, chronic kidney disease, and thyroid disorders.

She performs diagnostic procedures including ascitic aspiration and drainage, diagnostic pleural tap, and lumbar puncture.

Dr. Bayartsetseg has published peer-reviewed articles in Mongolian and regional Asian medical journals, with research focused on hepatitis B and C epidemiology in Mongolia, liver disease outcomes in the Mongolian population, and infectious disease management in the resource context of Mongolian healthcare. Mongolia has among the world's highest hepatitis B prevalence, making her research clinically significant. She collaborates with internal medicine and hepatology colleagues in South Korea and Japan and participates in WHO Mongolia-supported hepatitis elimination program research activities.

Dr. Bayartsetseg speaks Mongolian, Russian, and English, making her accessible to expatriates living in Ulaanbaatar, patients from neighboring Russia and China, and Mongolian diaspora patients. State Third Central Hospital accepts international patient referrals and can provide medical documentation in English. Video consultations are available for second opinions on liver disease, diabetes management, and infectious disease. She assists patients in coordinating referrals to liver disease specialists in South Korea and Japan for complex hepatology cases exceeding local capacity.

Dr. Bayartsetseg has been recognized by State Third Central Hospital for her sustained contributions to internal medicine and hepatology services, particularly for her active participation in Mongolia's national hepatitis elimination program — a major public health initiative addressing the country's extremely high hepatitis B and C burden. She has been acknowledged by WHO Mongolia for her contributions to hepatitis awareness and management. She is a member of the Mongolian Society of Internal Medicine and contributes to continuing medical education for physicians managing liver disease and infectious diseases in Mongolia.