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Dr. Orhan Kocaman

Dr. Orhan Kocaman

Bariatric Surgeon ·
, Istanbul, Turkey

16 Years of experience ·
Languages Spoken: Turkish & English

Orhan Kocaman is currently available for hospital consultations. Explore online consultation options or book an in-person visit.

About Dr. Orhan Kocaman

Conditions treated by Dr. Orhan Kocaman

Dr. Orhan Kocaman treats the conditions which are mentioned here.:

  • Gastrointestinal Cancer
  • Pancreatitis
  • Gastrointestinal Bleeding
  • Liver Cancer
  • Pancreatic Cancer
  • Crohn's Disease
  • Celiac Disease
  • Esophageal Varices
  • Jaundice
  • Inflammatory Bowel Diseases
  • Ulcer
  • Abdominal Pain
  • Bile Duct Cancer

Of the various gastroenterological health conditions, having inflamed large intestine or pancreas or sores on the stomach lining and small intestine are two common yet serious ones. Gallbladder condition and even a liver disease mean that your visit to a Gastroenterologist should not be delayed at any cost. The medical treatment of any problem or condition which is related to the digestive system comes under this specialty.

Signs and Symptoms treated by Dr. Orhan Kocaman

The signs and symptoms of patients with a gastroenterological problem are:

  • Belching or excessive gas
  • Changes in bowel habits that are beginning to concern you
  • Inflammatory bowel disease (IBD)
  • Coeliac disease
  • Vomiting
  • Lethargy
  • Pale coloured stools
  • Oesophageal discomfort
  • Bowel movements that are hard to control
  • Leakage/ stains in underwear
  • Urine of dark colour
  • Loss of weight and appetite
  • Bloating or abdominal pain
  • Persistent heartburn/ GERD
  • Gallstones
  • Rectal bleeding/ blood in stool

Even seemingly less harmful and everyday symptoms like diarrhea, constipation and heartburn can be an evidence of something more serious if it is happening repeatedly and persistently. Their are ofcourse some more chronic symptoms like yellowing of the skin and blood in the stool which are a clear indication of a Gastroenterological condition. It is wise to not ignore the signs for long lest they become serious and the severity of the illness becomes difficult to handle and treatment does not remain effective.

Operating Hours of a Gastroenterlogist

Monday to Saturday, 9 am to 5 pm are the operating hours of the doctor whereas Sunday is an off day. Known for being an expert physician in the field of Gastroenterology, the doctor is also highly accomplished.

Popular Procedures performed by Dr Orhan Kocaman

It is the following important popular procedures that the Dr. Orhan Kocaman performs on the patients.:

  • Endoscopy (UGI Endoscopy)

The digestive system related health conditions, whether acute or chronic are treated and managed by the doctor. The work of a Gastroenterologist does not involve surgery per se, the procedures they perform are usually for diagnosis purposes and cannot be termed as surgical. If the treatment requires surgery at any point of treatment the patient is advised to visit a gastrointestinal surgeon.

Qualification

  • Istanbul University Cerrahpasa Faculty of Medicine -Medical Education Istanbul University Cerrahpasa Faculty of Medicine - Specialization
  • Kocaeli University Faculty of Medicine - SubDal - Specialization Bezmialem Foundation University Faculty of Medicine - Gastroenterology BD - Associate Professorship

Work Experiences

  • Currently working at Medical Park Bahcelievler Hospital

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Procedures Performed

Adhesion Lysis
Cardiomyotomy
Endoscopy (UGI Endoscopy)
Foregut Surgery
Hiatal Hernia Repair
Ileoanal Anastomosis (J-Pouch) Surgery
Laparoscopic Colon Resection
Laparoscopic Ventral Hernia Repair
Low Anterior Resection
Meckel's Diverticulectomy Treatment
Nissen Fundoplication
Pancreatectomy
Pancreatic Surgery
Partial Colectomy
Peroral Endoscopic Myotomy (POEM)
Proctectomy
Retroperitoneum Surgery
Robotic Hernia Surgery
Small Bowel Resection
Splenectomy
Stapled Hemorrhoidopexy
Subtotal Proctocolectomy
Total Colectomy

Frequently Asked Questions

Dr. Orhan Kocaman is a specialized Gastroenterologist and is one of the most sought after doctors in Bahcelievler, Turkey.

No, this doctor does not offer telemedicine via MediGence

Dr. Orhan Kocaman is one of the most sought after specialists in Turkey and has over years of experience.

FAQ's Related to Gastroenterologist

It is a Gastroenterologist who helps you get treated for the health conditions you suffer from related to the digestive system. When you first consult with the doctor, they will ask you the questions and recommend tests that will help gain a better understanding into the illness and its causes. If you need to make lifestyle and dietary adjustments, a Gastroenterologist assists you in keeping up with them and prescribing you the medications. A Gastroenterologist must have the knowledge of various factors such as:

  1. Gastrointestinal organs
  2. Movement of matter via intestines and stomach
  3. Digestion, absorption of nutrients
  4. Removal of body waste
  5. Liver system

The tests required before and during consultation for a Gastroenterologist are as follows:

  • Upper GI Series (barium swallow or barium meal)
  • pH Monitoring
  • Esophageal/Gastric Manometry
  • Endoscopic Retrograde Cholangiopancreatography (ERCP)
  • Endoscopic Ultrasound
  • Gastroscopy

To understand these conditions better, to have a firm assessment one can undergo procedures such as Liver biopsies, Capsule endoscopies and Colonoscopies. An Endoscopy uses a camera inserted inside body via mouth through to esophagus with a thin and long tube to send back images which can help decipher symptoms. The difference between an endoscopy and a Colonoscopy, Sigmoidoscopy is that in these two the tube is inserted via rectum. When the doctor wishes to understand the causes behind a condition, confirm the diagnoses or view the response to the treatment good non invasive method is diagnostic imaging tests. You can know what is going inside the body, in this case the digestive system and tract with tests like Computed tomography scan (CT or CAT scan), Magnetic resonance imaging (MRI) and Ultrasound.

It is important for you to schedule regular visits to the Gastroenterologist if you are in the age bracket of 50 plus years and regular checkups for colorectal cancer are needed or the symptoms which show an imminent condition regards your digestive system or tract. Sometimes the condition is clear and not just an indicative symptom, few conditions that would need a visit are suspected gallstones, ulcers, and Hemorrhoids. Having an excellent digestive health post a surgery and during the rehabilitation process is helped along if you refer to this doctor.

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Dr. Vishwas Kaushik
Reviewer

MBBS, MD

7 Years of Experience

Last Reviewed - June 2026

Dr. Vishwas Kaushik is a qualified medical professional holding an MBBS from the prestigious Belgorod State University, Russia, with a strong foundation in clinical medicine and healthcare practice. His comprehensive medical training has equipped him with a profound understanding of evidence-based clinical practices, patient-centered care, and the evolving landscape of modern medicine. With a keen interest in medical research and scientific communication, he consistently translates complex clinical concepts into clear, accurate, and accessible content for diverse audiences. His work reflects a deep commitment to advancing medical knowledge, delivering impactful healthcare insights, and bridging the gap between clinical expertise and accessible medical communication.
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Alvina Hasan
Author

M.Pharm

2 Year of Experience

Last Reviewed - June 2026

Alvina Hasan is a dedicated medical researcher and scientific writer with a strong foundation in pharmaceutical sciences. She holds a B.Pharm from Jamia Hamdard University and an M.Pharm in Quality Assurance from DIPSAR University.

With deep medical expertise and a strong interest in healthcare communication, she focuses on transforming complex clinical and scientific information into clear, engaging, and easy-to-understand narratives. She develops insightful healthcare articles and research-driven content designed to support both medical professionals and patients, helping bridge the gap between advanced medical knowledge and practical understanding.

Readers can explore her published research and articles here:

https://carcinogenesis.com/index.php/JOC/article/view/868

https://carcinogenesis.com/index.php/JOC/article/view/870

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