{"schema_version":"bookimed.page-context.v1","id":"surgeon-bookimed-125","url":"https://hub.bookimed.com/bariatric-surgery/surgeon-bookimed-125/","json_url":"https://hub.bookimed.com/bariatric-surgery/surgeon-bookimed-125/#page-context","content_revision":"bariatric-registry-v1","date_modified":"2026-10-21","language":"en","kind":"doctor-profile","title":"Gerhard Prager: bariatric surgeon profile","summary":"Gerhard Prager is a general surgeon at Vienna General Hospital (AKH) in Vienna, Austria. The bariatric procedures associated with Gerhard Prager include gastric banding and sleeve gastrectomy. Publications linked to Gerhard Prager cover a swallowable self-expanding intragastric balloon trial stopped because of small bowel obstruction (2026); bone metabolism and bone density after metabolic and bariatric surgery (2026); esophageal function and reflux after one-anastomosis gastric bypass (2025). These publication topics do not establish personal surgical results or who performed the operations. To ask about bariatric care with Gerhard Prager, use the [Bookimed inquiry page for Gerhard Prager](https://us-uk.bookimed.com/doctor/gerhard-prager/).","research_credit":{"name":"Yevhenii Kozlov","role":"Co-Founder of Bookimed","url":"https://us-uk.bookimed.com/ceo/kozlov/","contribution":"Research project led","assistance":"For me, helping patients find the best medical care is a personal responsibility. This guide is built by a process we designed to do the hard part — reading the research, comparing surgeons and clinics, checking real offers — and to make the result simple and clear for every patient. AI tools do much of the work; every fact links to its source."},"editorial_scope":"Migration of supplied source-linked content. No new clinical review is claimed.","research_method":"How this guide is researched and compared Research project led by Yevhenii Kozlov .","sections":[{"id":"narrative-orientation","title":"About Gerhard Prager","text":"About Gerhard Prager Gerhard Prager is a general surgeon at Vienna General Hospital (AKH) in Vienna, Austria. The bariatric procedures associated with Gerhard Prager include gastric banding and sleeve gastrectomy. Publications linked to Gerhard Prager cover a swallowable self-expanding intragastric balloon trial stopped because of small bowel obstruction (2026); bone metabolism and bone density after metabolic and bariatric surgery (2026); esophageal function and reflux after one-anastomosis gastric bypass (2025). These publication topics do not establish personal surgical results or who performed the operations. To ask about bariatric care with Gerhard Prager, use the Bookimed inquiry page for Gerhard Prager . Sources (1) Gerhard Prager","links":[{"label":"Bookimed inquiry page for Gerhard Prager","url":"https://us-uk.bookimed.com/doctor/gerhard-prager/"},{"label":"Gerhard Prager","url":"https://us-uk.bookimed.com/doctor/gerhard-prager/"}]},{"id":"profile-data-clinic","title":"Clinic and location","text":"Clinic and location Gerhard Prager · Vienna General Hospital (AKH) · Vienna, Austria Bookimed doctor profile Sources (1) Gerhard Prager","links":[{"label":"","url":"https://hub.bookimed.com/bariatric-surgery/surgeon-bookimed-125/"},{"label":"Gerhard Prager","url":"https://hub.bookimed.com/bariatric-surgery/surgeon-bookimed-125/"},{"label":"","url":"https://hub.bookimed.com/bariatric-surgery/clinic-216/"},{"label":"Vienna General Hospital (AKH)","url":"https://hub.bookimed.com/bariatric-surgery/clinic-216/"},{"label":"Bookimed doctor profile","url":"https://us-uk.bookimed.com/doctor/gerhard-prager/"},{"label":"Gerhard Prager","url":"https://us-uk.bookimed.com/doctor/gerhard-prager/"}]},{"id":"profile-data-operations","title":"Operations and published practice","text":"Operations and published practice Band Sleeve Published practice information Dr. Gerhard Prager is a gastric surgeon in Austria who has performed over 3,000 obesity operations. He heads the Obesity Outpatient Clinic at Vienna General Hospital. Dr. Prager also leads the Metabolic Surgery Center at Confraternitaet Private Hospital. He specializes in gastric bypass, sleeve gastrectomy, and gastric banding. Source for this statement Sources (1) Gerhard Prager","links":[{"label":"Source for this statement","url":"https://us-uk.bookimed.com/doctor/gerhard-prager/"},{"label":"Gerhard Prager","url":"https://us-uk.bookimed.com/doctor/gerhard-prager/"}]},{"id":"profile-data-experience","title":"Reported experience","text":"Reported experience at least 3000 operations. Biography source Sources (1) Gerhard Prager","links":[{"label":"Biography source","url":"https://us-uk.bookimed.com/doctor/gerhard-prager/"},{"label":"Gerhard Prager","url":"https://us-uk.bookimed.com/doctor/gerhard-prager/"}]},{"id":"profile-data-publications","title":"Publications","text":"Publications Early Termination of a First-in-Human Trial of a Swallowable Self-Expanding Intragastric Balloon (IGBalloon©) Due to Small Bowel Obstruction. (2026). Publication Changes in bone metabolism and densitometry after metabolic/bariatric surgery: a comparison of pre- and postoperative results in a prospective long-term study. (2026). Publication Update on esophageal function, acid and non-acid reflux after one-anastomosis gastric bypass (OAGB): high-resolution manometry, impedance-24-h pH-metry, and gastroscopy in a prospective mid-term study. (2025). Publication Sources (3) Early Termination of a First-in-Human Trial of a Swallowable Self-Expanding Intragastric Balloon (IGBalloon©) Due to Small Bowel Obstruction. Changes in bone metabolism and densitometry after metabolic/bariatric surgery: a comparison of pre- and postoperative results in a prospective long-term study. Update on esophageal function, acid and non-acid reflux after one-anastomosis gastric bypass (OAGB): high-resolution manometry, impedance-24-h pH-metry, and gastroscopy in a prospective mid-term study.","links":[{"label":"Publication","url":"https://pubmed.ncbi.nlm.nih.gov/42484826/"},{"label":"Publication","url":"https://pubmed.ncbi.nlm.nih.gov/42624709/"},{"label":"Publication","url":"https://pubmed.ncbi.nlm.nih.gov/39966130/"},{"label":"Early Termination of a First-in-Human Trial of a Swallowable Self-Expanding Intragastric Balloon (IGBalloon©) Due to Small Bowel Obstruction.","url":"https://pubmed.ncbi.nlm.nih.gov/42484826/"},{"label":"Changes in bone metabolism and densitometry after metabolic/bariatric surgery: a comparison of pre- and postoperative results in a prospective long-term study.","url":"https://pubmed.ncbi.nlm.nih.gov/42624709/"},{"label":"Update on esophageal function, acid and non-acid reflux after one-anastomosis gastric bypass (OAGB): high-resolution manometry, impedance-24-h pH-metry, and gastroscopy in a prospective mid-term study.","url":"https://pubmed.ncbi.nlm.nih.gov/39966130/"}]},{"id":"profile-data-booking","title":"Ask about treatment","text":"Ask about treatment Ask Bookimed about Gerhard Prager","links":[]},{"id":"profile-data-request-form","title":"Request a treatment proposal","text":"Request a treatment proposal What would you like help with? Answer a few questions on Bookimed, then add your contact details to request help. Privacy policy Open the Bookimed request form","links":[{"label":"Privacy policy","url":"https://us-uk.bookimed.com/page/privacy-policy/"}]}],"introduction":"Bariatric surgery guide / Gerhard Prager Surgeon profile Gerhard Prager: bariatric surgeon profile Gerhard Prager — Vienna General Hospital (AKH) Research project led by Yevhenii Kozlov · Co-Founder of Bookimed Updated 21 October 2026 Sources linked throughout Portrait source ↗ Gerhard Prager Vienna General Hospital (AKH) → Vienna · Austria Profile on Bookimed","related_documents":[{"id":"bariatric-surgery","title":"Bariatric and metabolic surgery: compare your options","kind":"home","url":"https://hub.bookimed.com/bariatric-surgery/","json_url":"https://hub.bookimed.com/bariatric-surgery/page-contexts/bariatric-surgery.json"},{"id":"clinic-216","title":"Vienna General Hospital (AKH): surgeons","kind":"clinic-profile","url":"https://hub.bookimed.com/bariatric-surgery/clinic-216/","json_url":"https://hub.bookimed.com/bariatric-surgery/clinic-216/#page-context"}],"entity":{"id":"doctor.gerhard-prager","source_ids":["source.242488496f873f738b60","source.62a2b5edb3ac03ad9153","source.7eb5b0cc4d0db04faec8"],"name":"Gerhard Prager","bookimed_doctor_id":125,"method_links":[{"clinical_method_id":"bariatric.balloon","papers_count":2},{"clinical_method_id":"bariatric.band","papers_count":1},{"clinical_method_id":"bariatric.bypass.mini","papers_count":12},{"clinical_method_id":"bariatric.bypass.rygb","papers_count":20},{"clinical_method_id":"bariatric.esg","papers_count":1},{"clinical_method_id":"bariatric.revisional","papers_count":5},{"clinical_method_id":"bariatric.sleeve","papers_count":9}],"selection_reason":"topic_research_first_or_last=26, topic_rank=40, last_topic_paper_year=2026 and example_pmids=42484826 support E2 (first/last-author original procedural cohort/series: Early Termination of a First-in-Human Trial of a Swallowable Self-Expanding Intragastric Balloon (IGBalloon©) Due to Small Bowel Obstruction); bookimed_bookable=true.","research_fact_ids":["bariatric.numeric.41320.doctor.gerhard-prager","bariatric.numeric.41321.doctor.gerhard-prager","bariatric.numeric.40974.doctor.gerhard-prager","bariatric.numeric.35618.doctor.gerhard-prager"],"personal_surgical_volume":null,"personal_volume_status":"unknown","selected_publications":[{"study_id":"PMID:42484826","source_id":"pubmed.42484826","pmid":"42484826","title":"Early Termination of a First-in-Human Trial of a Swallowable Self-Expanding Intragastric Balloon (IGBalloon©) Due to Small Bowel Obstruction.","year":2026,"publication_types":["Journal Article","Clinical Trial"],"library_type":"other","author_matches":[{"name":"Gerhard Prager","last_name":"Prager","given_name":"Gerhard","initials":"G","name_key":"prager gerhard","orcid":null,"position":10,"sole_author":false,"last_named_person":true,"roles":["last"],"affiliations":["Division of Visceral Surgery, Department of General Surgery, Medical University of Vienna, Vienna, Austria. gerhard.prager@meduniwien.ac.at."],"countries":["Austria"]}],"body_path":"results/section_builder/bariatric/sources/PMID_42484826.abstract.txt","body_sha256":"a0bf8e19d76ffcb6a5b1d59f5d3cec9166c21e51449c56e5de3b508deb636765"},{"study_id":"PMID:42624709","source_id":"pubmed.42624709","pmid":"42624709","title":"Changes in bone metabolism and densitometry after metabolic/bariatric surgery: a comparison of pre- and postoperative results in a prospective long-term study.","year":2026,"publication_types":["Journal Article"],"library_type":"series","author_matches":[{"name":"Gerhard Prager","last_name":"Prager","given_name":"Gerhard","initials":"G","name_key":"prager gerhard","orcid":null,"position":14,"sole_author":false,"last_named_person":true,"roles":["last"],"affiliations":["Division of Visceral Surgery, Department of General Surgery, Medical University of Vienna, Vienna, Austria. 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