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Dr. Johann Ockenga

Surgical Gastroenterologist, Surgical Oncologist

Dr. Johann Ockenga

HOD

24+ years of experience

Graduation, Post Graduation
Bremen Ost Clinic, Bremen - Germany

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    Treatments & Conditions Dr. Johann Ockenga Specializes In

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    Liver Cancer Colon Cancer Bile Duct Cancer Gallbladder Cancer

    Areas of Expertise

    Dr. Johann Ockenga

    Major Conditions Treated

    • Colon Cancer & Sigmoid Adenocarcinoma
    • Hepatocellular Carcinoma (HCC) & Liver Metastases
    • Pancreatic Cancer & Chronic Pancreatitis
    • Inflammatory Bowel Disease (Crohn’s Disease & Ulcerative Colitis)
    • Hepatitis B and Hepatitis C
    • Liver Cirrhosis and Liver Failure
    • Reflux Disease (GERD) & Barrett’s Oesophagus
    • Diabetes Mellitus & Endocrine Disorders
    • Malnutrition & Cachexia in Cancer Patients
    • Acute Pancreatitis

    Sub-specialties

    • Hepatology & Liver Oncology: Diagnosis and management of HCC, viral hepatitis, autoimmune liver disease and liver cirrhosis — making him a leading Surgical Gastroenterologist specialist Bremen, Germany for liver disease patients.
    • Clinical & Oncological Nutrition: ESPEN-guideline-based nutritional therapy for cancer patients, including parenteral and enteral nutrition — supporting referrals seeking the best Surgical Oncologist doctor in Germany for complex multimodal cancer care.
    • Interventional Gastroenterology & Endoscopy: Diagnostic and therapeutic endoscopy, ERCP, EUS and advanced abdominal ultrasonography (DEGUM II).

    Advanced Procedures & Treatments

    • Diagnostic & Therapeutic Upper GI Endoscopy and Colonoscopy
    • Endoscopic Retrograde Cholangiopancreatography (ERCP)
    • Endoscopic Ultrasound (EUS) with Fine-Needle Aspiration
    • Advanced Abdominal Ultrasound & Contrast-Enhanced Ultrasound
    • Endoscopic Variceal Banding & Sclerotherapy
    • Polypectomy & Endoscopic Mucosal Resection (EMR)
    • Liver Biopsy (Image-Guided)
    • Targeted & Systemic Therapy for HCC and GI cancers (multidisciplinary)
    • Clinical Nutrition Therapy (Parenteral & Enteral) for cancer and chronic disease

    Qualifications & Credentials

    Medical Degrees

    • MD (Medical Degree) — Hannover Medical School (Medizinische Hochschule Hannover, MHH)
    • Specialist Certification in Internal Medicine (Facharzt) — Germany
    • Subspecialty Certification in Gastroenterology — Germany
    • Habilitation & Professorship (Prof. Dr. med.) — Charité-Universitätsmedizin Berlin / MHH

    Fellowships & Special Training

    • Subspecialty training in Hepatology & Endocrinology
    • Advanced training in Nutritional Medicine and Diabetology
    • DEGUM II Certification — Advanced Abdominal Ultrasound Trainer
    • Special qualification in Proctology and Quality Management

    Certifications & Accreditations

    • Bremen State Medical Council (Ärztekammer Bremen) — Registered Specialist
    • DEGUM (German Society for Ultrasound in Medicine) — Level II Trainer
    • DGEM (German Society of Nutritional Medicine) — Past Secretary (2012)
    • European Society for Clinical Nutrition and Metabolism (ESPEN) — Active Faculty

    Professional Experience

    Current Affiliation

    • Medical Director (Ärztlicher Direktor / Klinikdirektor), Medizinische Klinik II — Gastroenterology, Hepatology, Endocrinology, Diabetes & Nutritional Medicine, Klinikum Bremen-Mitte (Gesundheit Nord), Bremen, Germany (Present)

    Past Affiliations

    • Charité – Universitätsmedizin Berlin, Germany — Department of Gastroenterology, Hepatology and Endocrinology (academic and clinical role prior to Bremen)
    • Hannover Medical School (MHH), Germany — Postgraduate training and early academic career

    Academic & Research Roles

    • Professor (Prof. Dr. med.) — Internal Medicine / Gastroenterology
    • Past Secretary — German Society of Nutritional Medicine (DGEM), 2012
    • Faculty member — European Society for Clinical Nutrition and Metabolism (ESPEN)
    • Reviewer — World Journal of Gastroenterology
    • Co-author — German national and ESPEN international guidelines on clinical nutrition

    Key Achievements

    • 20+ years of clinical and academic experience in gastroenterology and clinical nutrition
    • Co-developed key guidelines for nutritional medicine in oncology and chronic disease
    • Director of one of northern Germany’s busiest gastroenterology & oncology referral centres
    • Active speaker and educator at national and international congresses (DGEM, ESPEN)

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    May 1, 2025

    Gallbladder Cancer

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