Dr. Johann Ockenga

About Dr. Johann Ockenga

Prof. Dr. med. Johann Ockenga is a senior German Gastroenterologist, Hepatologist and Endocrinologist with internationally recognised expertise in nutritional medicine, gastrointestinal oncology and complex liver and pancreatic disease. As Medical Director of one of Bremen’s leading internal medicine departments, he leads a multidisciplinary team caring for patients with hepatocellular carcinoma, colorectal cancer, inflammatory bowel disease and metabolic disorders. He is widely regarded as one of the leading Surgical Gastroenterologist & Surgical Oncologist specialists in Bremen, Germany for international patients with complex GI and HPB disease.

24+ years of clinical experience in gastroenterology, hepatology, endocrinology and clinical nutrition
Medical Director, Medizinische Klinik II — Klinikum Bremen-Mitte (Gastroenterology, Hepatology, Endocrinology, Diabetes & Nutritional Medicine)
Past Secretary, German Society of Nutritional Medicine (DGEM, 2012)
DEGUM II certified ultrasound trainer (advanced abdominal ultrasonography)
Reviewer for the World Journal of Gastroenterology and other peer-reviewed journals
Co-author of major ESPEN guidelines on clinical nutrition and oncology

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

Areas of Expertise

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

List of Disease and Treatment for which Dr. Johann Ockenga can be consulted

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)

Awards & Recognitions

National & International Awards

Information not publicly available.

Professional Memberships

German Society of Nutritional Medicine (DGEM)
European Society for Clinical Nutrition and Metabolism (ESPEN)
German Society for Digestive and Metabolic Diseases (DGVS)
German Society for Ultrasound in Medicine (DEGUM) — Level II Trainer
German Society of Internal Medicine (DGIM)

Research & Publications

Published Papers (Selected)

Ockenga J, et al. Nutritional therapy in acute pancreatitis. (Clinical Nutrition / ESPEN guideline).
Ockenga J, et al. Importance of nutritional management in diseases with exocrine pancreatic insufficiency.
Ockenga J, et al. UDP glucuronosyltransferase (UGT1A7) gene polymorphisms increase the risk of chronic pancreatitis and pancreatic cancer.
Cederholm T, Bosaeus I, Barazzoni R, ... Ockenga J, et al. ESPEN guideline on definitions and terminology of clinical nutrition.
Multiple co-authored ESPEN and DGEM guidelines on nutritional therapy in cancer and chronic illness.

Ongoing Research & Clinical Interests

Clinical nutrition and metabolism in oncology
Hepatocellular carcinoma and chronic liver disease management
Inflammatory bowel disease (upper-GI Crohn’s disease)
Acute and chronic pancreatitis
Endocrine and metabolic care in cancer patients

Estimated Treatment Costs

Procedure / Consultation	Estimated Cost (EUR)	Estimated Cost (USD)
Gastroenterology / Hepatology Consultation	€200 – €450	$220 – $490
Diagnostic Upper GI Endoscopy	€500 – €1,200	$540 – $1,300
Colonoscopy with Polypectomy	€800 – €1,800	$870 – $1,950
ERCP with Stent Placement	€2,500 – €5,000	$2,700 – $5,400
Endoscopic Ultrasound (EUS) with FNA	€2,000 – €4,000	$2,200 – $4,300
Liver Biopsy (Image-Guided)	€800 – €1,800	$870 – $1,950
Multidisciplinary Liver Tumour Workup & Plan	€2,500 – €6,000	$2,700 – $6,500

*Indicative estimates only. Actual costs subject to hospital pricing, case complexity, and insurance. Contact Cancer Rounds for a personalised quote.

Frequently Asked Questions

1. What advanced technologies does Prof. Dr. med. Johann Ockenga use in Surgical Gastroenterologist, Surgical Oncologist treatment?

Prof. Dr. med. Johann Ockenga employs the latest evidence-based tools and minimally invasive techniques relevant to Surgical Gastroenterologist, Surgical Oncologist. Virtual consultations and remote second opinions are also available to international patients. Contact Cancer Rounds for a detailed technology overview specific to your case.

2. What conditions does Prof. Dr. med. Johann Ockenga specialize in treating?

Prof. Dr. med. Johann Ockenga is a specialist in Surgical Gastroenterologist, Surgical Oncologist, treating a broad spectrum of conditions in this field — including both common presentations and complex, rare cases. International patients seek treatment for conditions requiring expert Surgical Gastroenterologist, Surgical Oncologist care in Bremen, Germany.

3. How do I book an appointment with Prof. Dr. med. Johann Ockenga?

Appointments with Prof. Dr. med. Johann Ockenga can be booked directly through the Cancer Rounds website or by contacting their international patient department for priority scheduling.

4. Can international patients receive treatment from Prof. Dr. med. Johann Ockenga?

Yes. Cancer Rounds provides full assistance for international patients seeking treatment from Prof. Dr. med. Johann Ockenga, including medical visa invitation letters, airport transfers, and local accommodation coordination.

5. What support is available for international patients?

International patients benefit from a dedicated concierge service provided by Cancer Rounds, including language interpretation, financial counselling, and pre-travel virtual consultations to review medical records before arrival.

6. Does Prof. Dr. med. Johann Ockenga offer second opinions for Surgical Gastroenterologist, Surgical Oncologist cases?

Yes. Second opinion consultations can be arranged via Cancer Rounds for patients who wish to review their diagnosis or treatment plan with an expert Surgical Gastroenterologist, Surgical Oncologist specialist in Bremen, Germany.

About Dr. Johann Ockenga