Omeed Alipour, M.D.
- Gastroenterology
- Therapeutic Endoscopy
Assistant Clinical Professor, Division of Gastroenterology, Department of Medicine
Omeed Alipour, M.D., is an interventional gastroenterologist at City of Hope Orange County Lennar Foundation Cancer Center with expertise in minimally invasive endoscopic techniques for the diagnosis and treatment of pancreatic and biliary diseases. Inspired by his father, a cardiologist practicing in Orange County, and influenced by his own experiences as a patient, Dr. Alipour was drawn to a career rooted in compassionate, patient-centered care. He chose gastroenterology for its balance of complex clinical problem-solving and procedures that can deliver immediate benefit to patients, particularly in cancer prevention, screening, and treatment.
During his training at the University of Washington, Dr. Alipour spent time at Fred Hutchinson Cancer Center, where he developed a strong appreciation for the multidisciplinary approach and coordinated care model unique to comprehensive cancer centers. His clinical interests include endoscopic ultrasound, ERCP, endoscopic and EUS-guided stenting, complex polyp resection, and advanced endoscopic therapies that can help patients maintain nutrition and quality of life during treatment.
Dr. Alipour has contributed to national clinical guidelines through his work with the American Society for Gastrointestinal Endoscopy and has been recognized multiple times as a top peer reviewer for Gastrointestinal Endoscopy. He values shared decision-making and strives to provide patients with clear information to support thoughtful, informed choices about their care. Dr. Alipour speaks Farsi at a conversational level and Spanish.
Location
Orange County Lennar Foundation Cancer Center
Irvine, CA 92618
Education & Experience
Degrees
- 2017, Doctor of Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California
- 2012, Bachelor of Science, Biology, University of California, Los Angeles, Los Angeles, California
Fellowship
- 2023–2024, Fellow, Advanced Endoscopy, University of Washington, Seattle, Washington
- 2020–2023, Chief Fellow, Gastroenterology, University of Washington, Seattle, Washington
Residency
- 2017–2020, Resident, Internal Medicine, University of Southern California, Los Angeles, California
Professional Experience
- 2026–present, Interventional Gastroenterologist, Assistant Clinical Professor, Division of Gastroenterology, Department of Medicine, City of Hope Orange County, Irvine, California
- 2025–2028, Clinical Assistant Professor (Affiliated), Division of Gastroenterology, Stanford University, Stanford, California
- 2024–2026, Interventional Gastroenterologist, Santa Clara Valley County Health System, San Jose, California
- 2023–2024, Acting Instructor - Gastroenterologist, University of Washington, Seattle, Washington
Awards & Memberships
Awards
- Top Reviewer - Gastrointestinal Endoscopy 2024–2025
- Top Reviewer - Gastrointestinal Endoscopy 2023–2024, New/Mentee Reviewer
Memberships
- Member, American Gastroenterology Association
- Member, American College of Gastroenterology
- Member, American Society of Gastrointestinal Endoscopy
- Fellow, American College of Physicians
Publications
- Omeed Alipour, Sheila D. Rustgi, Kathleen Teixeira, Leslie Narramore, AGA Government Affairs Committee, Shazia Mehmood Siddique. "American Gastroenterological Association Policy Priorities for our 2025 Legislative Agenda." Clinical Gastroenterology & Hepatology (2025). Doi: https://doi.org/10.1016/j.cgh.2025.04.021. In-press.
- Omeed Alipour. "Current Generation Sequencing: Has The Next Generation of Malignant Biliary Stricture Identification Arrived?" Editorial. Gastrointestinal Endoscopy, July 2025.
- Machav Desai, Wenly Ruan, Nirav Thosani, Manuel Amaris, J Stephen Scott, Ahmed Saeed, Barham Dayyeh, Marcia Irene Canto, Wasif Abidi, Omeed Alipour, et al. "American Society for Gastrointestinal Endoscopy guideline on the diagnosis and management of GERD: summary and recommendations." Gastrointestinal Endoscopy. Volume 101, Issue 2, P267-284. February 2025. PMID 39692638
- Divyanshoo Kohli, Wasif Abidi, Natalie Cosgrove, Jorge Machicado, Madhav Desai, Nauzer Forbes, Neil Marya, Nikhil Thiruvengadam, Nirav Thosani, Omeed Alipour, et al. "American Society for Gastrointestinal Endoscopy guideline on gastrostomy feeding tubes: summary and recommendations." Gastrointestinal Endoscopy. Volume 101, Issue 1, P25-35. January 2025. PMID 39520459
- Divyanshoo Kohli, Wasif Abidi, Natalie Cosgrove, Jorge Machicado, Madhav Desai, Nauzer Forbes, Neil Marya, Nikhil Thiruvengadam, Nirav Thosani, Omeed Alipour, et al. "American Society for Gastrointestinal Endoscopy guideline on gastrostomy feeding tubes: methodology and review of evidence." Video Gastrointestinal Endoscopy. Volume 10, Issue 1, P1-23. January 2025
- Swati Pawa, Neil Marya, Nikhil Thiruvengadam, Saowanee Ngamruengphong, Todd Baron, Anthony Yuen Bun Tech, Christopher Bent, Wasif Abidi, Omeed Alipour, et al. "American Society for Gastrointestinal Endoscopy guideline on the role of therapeutic EUS in the management of biliary tract disorders: summary and recommendations." Gastrointestinal Endoscopy. Volume 100, Issue 6, P967-979. December 2024. PMID 39078360
- Swati Pawa, Neil Marya, Nikhil Thiruvengadam, Saowanee Ngamruengphong, Todd Baron, Anthony Yuen Bun Tech, Christopher Bent, Wasif Abidi, Omeed Alipour, et al. "American Society for Gastrointestinal Endoscopy guideline on the role of therapeutic EUS in the management of biliary tract disorders: methodology and review of evidence." Gastrointestinal Endoscopy. Volume 100, Issue 8, E79-E135. December 2024. PMID 39412489
- Jorge Machicado, Sunil Sheth, Jean Chalhoub, Nauzer Forbes, Madhav Desai, Saowanee Ngamruengphong, Georgios Papachristou, Vaibhav Sahai, Ibrahim Nassour, Wasif Abidi, Omeed Alipour, et al. "American Society for Gastrointestinal Endoscopy guideline on role of endoscopy in the diagnosis and management of solid pancreatic masses: Summary and Recommendations." Gastrointestinal Endoscopy. Volume 100, Issue 5, 786-796. November 2024. PMID 39387777
- Jorge Machicado, Sunil Sheth, Jean Chalhoub, Nauzer Forbes, Madhav Desai, Saowanee Ngamruengphong, Georgios Papachristou, Vaibhav Sahai, Ibrahim Nassour, Wasif Abidi, Omeed Alipour, et al. "American Society for Gastrointestinal Endoscopy guideline on role of endoscopy in the diagnosis and management of solid pancreatic masses: methodology and review of evidence." Gastrointestinal Endoscopy. Volume 100, Issue 5, E1-E78. November 2024. PMID 39269378
- Sunil Sheth, Jorge Machicado, Jean Chalhoub, Christopher Forsmark, Nicholas Zyromski, Nirav Thosani, Nikhil Thiruvengadam, Wenly Ruan, Swati Pawa, Saowanee Ngamruengphong, Neil Marya, Divyanshoo Kohli, Larissa Fuji-Lau, Nauzer Forbes, Sherif Elhanafi, Madhav Desai, Natalie Cosgrove, Nayantara Coelho-Prabhu, Stuart Amateau, Omeed Alipour, et al. "American Society for Gastrointestinal Endoscopy guideline on the role of endoscopy in the management of chronic pancreatitis: summary and recommendations." Gastrointestinal Endoscopy. Volume 100, Issue 4, 584-594. October 2024. PMID 39115496
- Sunil Sheth, Jorge Machicado, Ankit Chhoda, Jean Chalhoub, Christopher Forsmark, Nicholas Zyromski, Behnam Sadeghirad, Rebecca Morgan, Nirav Thosani, Nikhil Thiruvengadam, Wenly Ruan, Swati Pawa, Saowanee Ngamruengphong, Neil Marya, Divyanshoo Kohli, Larissa Fuji-Lau, Nauzer Forbes, Sherif Elhanafi, Madhav Desai, Natalie Cosgrove, Nayantara Coelho-Prabhu, Stuart Amateau, Omeed Alipour, et al. "American Society for Gastrointestinal Endoscopy guideline on the role of endoscopy in the management of chronic pancreatitis: methodology and review of evidence." Gastrointestinal Endoscopy. Volume 100, Issue 4. October 2024. PMID 39243238
- Omeed Alipour, Bryan Balmadrid, and Yutaka Tomizawa. "Pediatric Therapeutic Endoscopic Procedures Performed by Adult Trained Advanced Endoscopists are Safe and Effective." Oct 2, 2023. Techniques and Innovations in Gastrointestinal Endoscopy. Vol 26, Issue 1, Research Letter P88-89, 2024
- Omeed Alipour, Alakh Gulati, Ling Shao, Bing Zhang. "Systematic Review and Meta-Analysis: Real-world Data Rates of Deep Remission with Anti-TNFa in Inflammatory Bowel Disease." BMC Gastroenterol. 2021 Aug 3;2010:312. doi: 10.1186/s12876-021-01883-6. PMID: 34344314
- Omeed Alipour, Vivian Lee, Tapas Tejura, Melissa Wilson, et al. "The assessment of sarcopenia using psoas muscle thickness per height is not predictive of post-operative complications in IBD." Scand J Gastroenterol. 2021 Aug 3:1-7. doi: 10.1080/00365521.2021.1958368. PMID: 34344243
- Zhang, Bing, Alakh Gulati, Omeed Alipour, Ling Shao. "Relapse from deep remission after therapeutic deescalation in inflammatory bowel disease: a systemic review and meta-analysis." Journal of Crohn's and Colitis. April 21, 2020. doi:10.1093/ecco-jcc/jaa087. PMID 32335870
- Rankin, Carl, Charalabos Pothoulakis, David Padua, Jihane Benhammou, Ling Shao, Nimah Ather, Jenny Sauk, Melissa Corson, Julie Elliott, Alakh Gulati, Omeed Alipour, Lorraine Rowe, Ami Patel, and Elizabeth Videlock. "The IBD associated long non-coding RNA IFNG-AS1 regulates the balance between inflammatory and anti-inflammatory cytokine production after T-cell stimulation." American Journal of Physiology - Gastrointestinal and Liver Physiology. Sep 23, 2019. doi: 10.1152/ajpgi.00232.2019. PMID 31545920
- Zhang, Bing, Brooke Nakamura, Arych Perlman, Omeed Alipour, Sadeea Abbasi, Peter Sohn, et al. "Identification of functional missense single-nucleotide polymorphisms in TNFAIP3 in a predominantly Hispanic population." Journal of Clinical and Translational Science, vol. 2, no. 6, Dec 2018, pp. 350-355. doi:10.1017/cts.2019.3. PMID 31131138
- Vaziri, Nesratola D., Mahyar Khazaeli, Ane C. F. Nunes, Kevin T. Harley, Hyder Said, Omeed Alipour, Wei Ling Lau, and Madeleine V. Pahl. "Effects of End-stage Renal Disease and Dialysis modalities on Blood Ammonia Level." Hemodialysis International (2016). PMID 27804262