Dr Keihan Ahmadi-Simab
Medical Director
Specialist in Gastroenterology
Hamburg, Germany

Dr Ahmadi-Simab - Logo

Endoscope Gastroenterology in Hamburg

Treatment focus

  • Endoscopic examinations (gastroscopy, colonoscopy)
  • Polyp removal (polypectomy)
  • Biopsies
  • Autoimmune diseases (autoimmune hepatitis, autoimmune pancreatitis, ulcerative colitis, Crohn's disease)
  • Viral, autimmune and other liver diseases
  • Functional disorders of the gastrointestinal tract (irritable bowel syndrome, gastroesophageal reflux disease)

Medical range

Range of Diagnostic Services

  • Diagnosis of liver diseases (lab tests, imaging (sonography, CT))
  • Diagnosis of intestinal diseases, chronic diarrhea
  • Diagnosis of reflux disease (reflux oesophagitis)
  • Endoscopic examinations (EGD (esophagogastroduodenoscopy, gastroscopy); colonoscopy (colonoscopy))
  • Polyp removal
  • Extraction of biopsy
  • Sonography (ultrasound)
  • Gastrointestinal transit time measurements (Hinton test, breathing tests, e.g. lactulose)
  • H2 breathing test (lactose, fructose intolerance, bacterial overgrowth)
  • Pancreatic function tests (e.g. pancreolauryl testing)


Range of Therapeutic Services

  • Follow-up of patients after tumour diseases
  • Therapy for liver disease such as viral-caused, autoimmune conditions or other diseases (nutritive-toxic, fatty liver, memory disorders)
  • Ascites (ascites = ascites), e.g. for the treatment of decompensation in cirrhosis of the liver
  • Therapy of autoimmune pancreatitis
  • Therapy of intestinal diseases
  • The treatment of inflammatory bowel disease (IBD): ulcerative colitis and Crohn's disease.
  • Treatment of functional disorders of the gastrointestinal tract
  • Irritable bowel syndrome
  • Therapy of reflux disease
  • Treatment of rectal diseases


Dr. med. Keihan Ahmadi Simab is a specialist in gastroenterology and is the medical director of the Klinikum Stephansplatz in Hamburg.

Dr. Ahmadi Simab offers more precise diagnosis and better treatment results through the interdisciplinary collaboration of gastroenterology with endoscopy

Gastroenterology - a Broad Specialty

Gastroenterology is concerned firstly with diseases of the gastrointestinal tract, liver, gallbladder and pancreas and other autoimmune diseases such as autoimmune hepatitis (AIH), autoimmune pancreatitis, ulcerative colitis or Crohn's disease. Patients from young to old may suffer from acute or chronic gastrointestinal diseases. These include for example celiac disease (gluten intolerance), which usually begins in childhood, Crohn's disease or ulcerative colitis usually make a first appearance in young adults, and colon cancer is more of an illness seen in patients above 60.

In particular, inflammatory bowel disease (IBD), Crohn's disease and ulcerative colitis are common medical conditions that can also lead to systemic damage, including the joints alongside the intestinal changes. As ulcerative colitis in particular is associated with an increased risk of developing colorectal cancer, patients with this disease are urgently advised to undergo regular colonoscopies.

Endoscopic Examination: Gastroscopy and Colonoscopy

Endoscopic examination (mirroring) is done using a flexible examination apparatus with camera. In general, stomach endoscopy (gastroscopy, EGD, esophagogastroduodenoscopy) is differentiated from a colonoscopy (colonoscopy). The examination is usually under mild sedation (half asleep), so the patient feels no pain during endoscopy. Gastroscopy is mainly used for the assessment of changes in the esophagus, stomach and duodenum. Here, inflammation, ulcers, tumours or mucosal changes (e.g.: due chronic heartburn) can be shown. During an endoscopic examination, biopsies (tissue samples) of suspicious areas can be taken.

During a colonoscopy which always precedes a colon cleansing, attention is paid mainly to signs of inflammation or polyps. As polyps can transform malignantly to cancer, they are removed during a colonoscopy. This non-painful procedure should be carried out prophylactically for all patients over 55 every 10 years, because the removal of polyps can prevent colon cancer, which may result from these growing polyps.

Bowel Cancer - Colorectal Carcinoma, Colon Carcinoma

At 95%, colon cancer is one of the most common tumours of the gastrointestinal tract. Colorectal cancer is the second most common cancer in women and men. As colon cancer usually causes symptoms only at a very late tumour stage, screening tests, such as colonoscopy are essential for early detection. Since colon cancer is always created from previously benign polyps (= mucosal growth), an emerging tumour can be "cured" with polyp removal.

Dr. med. In addition to his specialty in gastroenterology, Keihan Ahmadi Simab is also a specialist in rheumatology and clinical immunology.

Find more information at Dr. Ahmadi Simab's website.

Curriculum vitae

1994 Graduated as medical doctor
1995 – 1996 Training at the University of Essen
1996-2002 Training for internal medicine (Gastroenterology) at the Israelite Hospital in Hamburg
2002-2007 Researcher of the Department of Medicine (Division of Rheumatology, Clinical Immunology) at the University Hospital Schleswig-Holstein, Lübeck campus and at the Rheumatology Clinic in Bad Bramstedt - senior physician at the University Clinic of Schleswig-Holstein (UKSH), Lübeck campus and at the Rheumatology Clinic in Bad Bramstedt, commissioner for quality management and hygiene, transfusion representative
2007 - 2009 Chief physician of the Department of Internal Medicine, Rheumatology and Clinical Immunology, Regio Clinic Wedel, Founding of the Wedel Rheumatology Centre, received authorised continuing education approval for all internal medicine, rheumatology, physical therapy and balneology, Schleswig-Holstein and Hamburg, granted KV-authorisation for the severe syndromes in rheumatology, KV Schleswig-Holstein
2009-2013 Chief physician of the Department of Rheumatology, Clinical Immunology and Nephrology at the Asklepios Klinik Altona, founding of the Asclepius Rheumatism Centre Hamburg and responsible of the autoimmune Academy of rheumatology of all the Asklepios Clinics, co-founding Uveitis Center Altona, member of the Vessel Centre AK Altona, founding and Autoimmune School Hamburg for further training of doctors, establishing the training series "the informed patient as a partner" for patient education

Medical team

  • Dr. med. Ursula Strate   
    Specialist in surgery and visceral surgery, focus on endoscopy
  • Dr. med. Stephanie Thiel   
    Specialist in general medicine, primary care, acupuncture
  • Dr. med. Jörn Klasen   
    Specialist in internal medicine, anthroposophic medicine, naturopathy | Dipl. curative teacher

Dr Ahmadi-Simab - Portrait Dr Keihan Ahmadi-Simab

Alte Postdirektion - Stephansplatz 3, D-20354 Hamburg

Monday to Friday 8:00 am to 6:00 pm


Hamburg Central Station 1,5 km
Hamburg Airport 10 km

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Dr Keihan Ahmadi-Simab
Medical Director

Klinikum Stephansplatz Hamburg
Gastroenterology and Endoscopy
Alte Postdirektion - Stephansplatz 3, D-20354 Hamburg

T: +49 40 320 88 310
F: +49 40 320 88 3130
E: ahmadi-simab@primomedico.com


Monday to Friday 8:00 am to 6:00 pm



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