Board Certification
|
American Board of Internal Medicine (Sub: Gastroenterology)
American Board of Internal Medicine (Internal Medicine)
|
Patient Rating
Patients consistently praise Dr. Ko as knowledgeable, professional, and compassionate. Reviewers report that he listens attentively, explains diagnoses and treatment options clearly, and takes time to answer questions so they feel informed. Many describe feeling reassured, confident, and well cared for under his management.
Generated via Patient Reviews
The patient rating score is an average of all responses on our patient experience survey. The rating averages scores for all questions about care from our providers. The scale on which responses are measured is 1 to 5 with 5 being the best score.
Patient comments are gathered from our patient experience survey and displayed in their entirety. For the convenience of our visitors, some patient comments have been translated from their original language into English while preserving their original meaning as accurately as possible. Patients are de-identified for confidentiality and patient privacy.
Board Certification and Academic Information
| Academic Departments |
Internal Medicine
-Assistant Professor (Clinical) |
|---|---|
| Academic Divisions |
Gastroenterology
|
| Board Certification |
American Board of Internal Medicine (Sub: Gastroenterology)
American Board of Internal Medicine (Internal Medicine)
|
Education history
| Undergraduate | Biology/Genetics - Cornell University | B.A. |
|---|---|---|
| Graduate Training | Medical Sciences - Boston University School of Medicine | M.A. |
| Professional Medical | Medicine - Boston University School of Medicine | M.D. |
| Residency | Internal Medicine - Los Angeles County + USC Medical Center | Resident |
| Fellowship | Gastroenterology - Los Angeles County + USC Medical Center | Fellow |
| Fellowship | Gastroenterology - Los Angeles County + USC Medical Center | Chief Fellow |
| Fellowship | Advanced Endoscopy - University of Michigan Medical School | Fellow |
Selected Publications
Journal Article
- Bria AJ, Fuller AK, Ko (2026). Underwater Resection of Redundant Jejunal Folds Causing Recurrent Cholangitis After Whipple Procedure. Gastrointestinal endoscopy,
- Vainer D, Fuller D, Ko (2026). Novel Single-Session Intragastric Approach Necrosectomy Using a Large Over-the-Scope Endoscopic Morcellator. Gastro hep advances, 5(6), 100958.
- Shober S, Dahal J, Bria AJ, Snyder L, Hannon NS, Ko (2026). Cholangioscopy-Guided Mini-Forceps to Recanalize and Treat a Severe Post-Liver Transplant Anastomotic Biliary Stricture. Gastrointestinal endoscopy,
- Bria AJ, Fuller AK, Snyder L, Shober S, Ko (2026). Rendezvous Double-Guidewire Technique for Difficult Minor Papilla Cannulation in Incomplete Pancreas Divisum. Gastrointestinal endoscopy,
- Ramai D, Maida M, Smith ER, Wang Y, Spadaccini M, Previtera M, Chandan S, Huang Y, Tokmak S, Bhandari P, DuBroff J, Ko C, Morris JD, Marasco G, Crin� SF, Facciorusso A, Mangiavillano B, Khashab MA (2025). Endoluminal radiofrequency ablation with stenting versus stenting alone in patients with malignant biliary obstruction: a meta-analysis of randomized trials. Endoscopy, 57(3), 272-281.
- Jonason DE, Rodriguez B, Ramai D, Staub J, Ko C (2025). Single-Stage EUS-Guided Gastrogastrostomy Secured With Clips With Anchor Prongs to Treat Massive Gastrointestinal Hemorrhage in Roux-en-Y Gastric Bypass.(Epub ahead of print). Gastrointest Endosc.
- Ramai D, Maida M, Smith ER, Wang Y, Spadaccini M, Previtera M, Chandan S, Huang Y, Tokmak S, Bhandari P, DuBroff J, Ko C, Morris JD, Marasco G, Crinó SF, Facciorusso A, Mangiavillano B, Khashab M (2025). Correction: Endoluminal radiofrequency ablation with stenting versus stenting alone in patients with malignant biliary obstruction: a meta-analysis of randomized trials. Endoscopy,
- Vainer D, Fuller D, Fellows E, Jonason D, Ko (2025). Natural orifice transluminal endoscopic surgery as salvage therapy for a migrated lumen-apposing metal stent in recurrent cholecystitis. Gastrointestinal endoscopy, 102(6), 909-911.
- DuBroff J, Holten D, Toy G, Jonason D, Ramai D, Morris J, ... Ko C (2025). Reduced migration of esophageal fully covered self-expandable metal stents affixed with clips with anchor prongs. iGIE, 4(1), p38-41.
- DuBroff J, Holten D, Toy G, Jonason D, Ramai D, Morris J, Fang J, Ko (2025). Reduced migration of esophageal fully covered self-expandable metal stents affixed with clips with anchor prongs. iGIE, 4(1), 38-41.
- Fellows E, Jonason DE, Ramai D, DuBroff J, Morris J, Ko C (2024). EUS-guided cystocystostomy for management of noncommunicating peripancreatic fluid collections.(Epub ahead of print). Gastrointest Endosc.
- Ramai D, Fox C, Ko C (2024). Endoscopic Ultrasound-Guided Gastrojejunostomy for Severe Duodenal Polyposis From Gardner Syndrome. Am J Gastroenterol, 119(12), 2362.
- Mangiavillano B, Ramai D, Kahaleh M, Tyberg A, Shahid H, Sarkar A, Samanta J, Dhar J, Bronswijk M, Van der Merwe S, Kouanda A, Ji H, Dai SC, Deprez P, Vargas-Madrigal J, Vanella G, Roberto L, Arcidiacono PG, Robles-Medranda C, Alcivar Vasquez J, Arevalo-Mora M, Fugazza A, Ko C, Morris J, Lisotti A, Fusaroli P, Dhaliwal A, Mutignani M, Forti E, Cottone I, Larghi A, Rizzatti G, Galasso D, Barbera C, Di Matteo FM, Stigliano S, Binda C, Fabbri C, Pham KD, Di Mitri R, Amata M, Crin� SF, Ofosu A, De Luca L, Al-Lehibi A, Auriemma F, Paduano D, Calabrese F, Gentile C, Hassan C, Repici A, Facciorusso A (2024). Outcomes of lumen apposing metal stent placement in patients with surgically altered anatomy: Multicenter international experience. Endosc Int Open, 12(10), E1143-E1149.
- Chang PW, Sadik J, Sahakian AB, Kankotia R, Ko C, Serna J, Rodriguez A, Lee H, Kulkarni S, Genyk Y, Sheikh M, Buxbaum JL (2024). A Preliminary Controlled Trial of Endoscopic Ultrasound-guided Fiducial Markers to Guide Pancreas Surgery. J Clin Gastroenterol, 58(9), 931-936.
- Fellows E, Ramai D, Patriquin L, Ko C (2024). Spontaneous Heterotopic Autotransplantation of Splenic Tissue: A Mimic of Pancreatic Malignancy. ACG Case Rep J, 11(9), e01490.
- Carpenter ES, Kadiyala P, Elhossiny AM, Kemp SB, Li J, Steele NG, Nicolle R, Nwosu ZC, Freeman J, Dai H, Paglia D, Du W, Donahue K, Morales J, Medina-Cabrera PI, Bonilla ME, Harris L, The S, Gunchick V, Peterson N, Brown K, Mattea M, Espinoza CE, McGue J, Kabala SM, Baliira RK, Renollet NM, Mooney AG, Liu J, Bhalla S, Farida JP, Ko C, Machicado JD, Kwon RS, Wamsteker EJ, Schulman A, Anderson MA, Law R, Prabhu A, Coulombe PA, Rao A, Frankel TL, Bednar F, Shi J, Sahai V, Pasca Di Magliano M (2024). KRT17high/CXCL8+ Tumor Cells Display Both Classical and Basal Features and Regulate Myeloid Infiltration in the Pancreatic Cancer Microenvironment. Clin Cancer Res, 30(11), 2497-2513.
- Tomm NK, Lamps LW, Ko C, Kwon RS, Cantley R, Pantanowitz (2022). Pronounced squamous cell contamination in biliary tract cytology: A diagnostic pitfall. Diagnostic cytopathology, 50(11), E320-E324.
- Lee A, Ko C, Buitrago C, Hiramoto B, Hilson L, Buxbaum J, NS-LR Study Group. (2021). Lactated Ringers vs Normal Saline Resuscitation for Mild Acute Pancreatitis: A Randomized Trial. Gastroenterology, 160(3), 955-957.e4.
- Buxbaum J, Ko C, Varghese N, Lee A, Sahakian A, King K, Serna J, Lee H, Tchelepi H, Van Dam J, Duddalwar V (2020). Qualitative and Quantitative Contrast-enhanced Endoscopic Ultrasound Improves Evaluation of Focal Pancreatic Lesions. Clin Gastroenterol Hepatol, 18(4), 917-925.e4.
- Brewer Gutierrez OI, Raijman I, Shah RJ, Elmunzer BJ, Webster GJM, Pleskow D, Sherman S, Sturgess RP, Sejpal DV, Ko C, Maurano A, Adler DG, Mullady DK, Strand DS, DiMaio CJ, Piraka C, Sharahia R, Dbouk MH, Han S, Spiceland CM, Bekkali NLH, Gabr M, Bick B, Dwyer LK, Han D, Buxbaum J, Zulli C, Cosgrove N, Wang AY, Carr-Locke D, Kerdsirichairat T, Aridi HD, Moran R, Shah S, Yang J, Sanaei O, Parsa N, Kumbhari V, Singh VK, Khashab MA (2019). Safety and efficacy of digital single-operator pancreatoscopy for obstructing pancreatic ductal stones. Endosc Int Open, 7(7), E896-E903.
- Brewer Gutierrez OI, Bekkali NLH, Raijman I, Sturgess R, Sejpal DV, Aridi HD, Sherman S, Shah RJ, Kwon RS, Buxbaum JL, Zulli C, Wassef W, Adler DG, Kushnir V, Wang AY, Krishnan K, Kaul V, Tzimas D, DiMaio CJ, Ho S, Petersen B, Moon JH, Elmunzer BJ, Webster GJM, Chen YI, Dwyer LK, Inamdar S, Patrick VB, Attwell A, Hosmer A, Ko C, Maurano A, Sarkar A, Taylor LJ, Gregory MH, Strand DS, Raza A, Kothari S, Harris JP, Kumta NA, Manvar A, Topazian MD, Lee YN, Spiceland CM, Trindade AJ, Bukhari MA, Sanaei O, Ngamruengphong S, Khashab MA (2018). Efficacy and Safety of Digital Single-Operator Cholangioscopy for Difficult Biliary Stones. Clin Gastroenterol Hepatol, 16(6), 918-926.e1.
- Buxbaum J, Sahakian A, Ko C, Jayaram P, Lane C, Yu CY, Kankotia R, Laine (2018). Randomized trial of cholangioscopy-guided laser lithotripsy versus conventional therapy for large bile duct stones (with videos). Gastrointestinal endoscopy, 87(4), 1050-1060.
- Buxbaum J, Ko C (2017). Response to Thompson. Am J Gastroenterol, 112(9), 1477.
Editorial
- Ko C, Buxbaum J (2021). Do the 2019 ASGE choledocholithiasis guidelines reduce diagnostic ERCP? Gastrointest Endosc, 93(6), 1360-1361.
Letter
- Buxbaum J, Ko C (2017). Response to Thompson [Letter to the editor]. Am J Gastroenterol, 112(9), 1477.
Other
- Mangiavillano B, Ramai D, Kahaleh M, Tyberg A, Shahid H, Sarkar A, Samanta J, Dhar J, Bronswijk M, Van der Merwe S, Kouanda A, Ji H, Dai SC, Deprez P, Vargas-Madrigal J, Vanella G, Leone R, Arcidiacono PG, Robles-Medranda C, Alcivar Vasquez J, Arevalo-Mora M, Fugazza A, Ko C, Morris J, Lisotti A, Fusaroli P, Dhaliwal A, Mutignani M, Forti E, Cottone I, Larghi A, Rizzatti G, Galasso D, Barbera C, Di Matteo FM, Stigliano S, Binda C, Fabbri C, Pham KD, Di Mitri R, Amata M, Crin� SF, Ofosu A, De Luca L, Al-Lehibi A, Auriemma F, Paduano D, Calabrese F, Gentile C, Hassan C, Repici A, Facciorusso A (2024). Correction: Outcomes of lumen apposing metal stent placement in patients with surgically altered anatomy: Multicenter international experience. Endosc Int Open (12(10), p. C8). Germany.
Dr. Ko was thorough and honest about my health care. He had a clear plan and truly desired to help.
You and your team saved my life! [NAME REMOVED]
He is very knowledgeable and always helps me understand my health!
Excellent provider
I feel very lucky to be in Dr. Ko's care.
Professional and explained my diagnosis to me until I understood. Thank you for your patience.
Before me and my son came from wyoming for the consultation I heard positive comments about dr Christopher ko and his great care to his patients!!
I absolutely love Dr. Ko!! He knew everything about my situation. And is doing everything he can to help me get better.
Dr. Ko is wonderful, I appreciate him and his ¿bed side manner¿ very much!
Great Doctor. Very knowledgeable, professional, kind, thorough explainer, listened intently. Loved him
Dr Ko was great, he took the time to talk with me, go over my history and discuss what the best options for treatment would be. Marking sure I understood everything and answering any questions I had or might have.
Dr Ko is a very professional doctor and made me feel at ease on my issues. I would recommend him to anybody. Geat visit with him .
Quiet - reassuring - gives confidence
Dr Ko is awesome
Dr Ko is a knowledgeable and caring medical professional