The 20 Best Colonoscopy Doctors near Camarillo, CA
Find the Experts and Specialists who perform Colonoscopy
Ventura County Gastroenterology Group
Dr. Karen Simon received her B.A. from Stanford University in 1996. She then attended Northwestern University for medical school. She completed her residency at Cedars-Sinai Medical Center in 2004 and her fellowship at UCLA and Cedars in 2008.Dr. Simon has proudly been serving patients in Ventura County since 2008 and is very involved in field research. Dr. Simon is also a speaker for Exact Sciences on behalf of Cologuard and is actively associated in research studies. She is a part of the Takeda Chloride Channel Council and a speaker for Amitiza, as well.She enjoys educating the doctors and the community as a lecturer on topics such as colorectal cancer screening at St. John's Hospital, where she is also a part of the Ethics Committee.Dr. Simon aims specifically to work with patients to discover the problem and develop a treatment strategy. She has a particular interest in Celiac Disease, Inflammatory Bowel Disease (IBD), and a passion for improving colorectal cancer detection.She is dedicated to developing a relationship with patients by utilizing education and mutual information sharing. Dr. Simon is rated as an Advanced provider by MediFind in Colonoscopy. She is also highly rated in 21 other conditions, according to our data. Her clinical expertise encompasses Gastroesophageal Reflux Disease (GERD), Familial Adenomatous Polyposis, Swallowing Difficulty, Endoscopy, and Colonoscopy. Dr. Simon is board certified in Internal Medicine (Sub: Gastroenterology). Dr. Simon is currently accepting new patients.
Ventura County Gastroenterology Group
Dr. Micha Rojany was born and raised in Southern California. He received his undergraduate degree from the University of California, Berkeley. He attended USC Medical School and completed his internship and residency at Cedars-Sinai Medical Center in Los Angeles. His fellowship in Gastroenterology was completed at the University of California, Davis.Dr. Rojany has practiced in Ventura County since 2006 and is an active member of the local medical community and hospital staff at St. John's Regional Medical Center in Oxnard, and Pleasant Valley Hospital, in Camarillo. He enjoys practicing as a Gastroenterologist with special interests in inflammatory bowel disease and biliary tract diseases.As a Gastroenterologist, Dr. Rojany enjoys the depth and breadth of his field. He takes pride in providing excellent care while taking care of his patients and meeting their needs as a community specialist in digestive diseases. Dr. Rojany is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 27 other conditions, according to our data. His clinical expertise encompasses Familial Adenomatous Polyposis, Gastrointestinal Bleeding, Angiodysplasia of the Colon, Endoscopy, and Gastrectomy. Dr. Rojany is board certified in Internal Medicine (Sub: Gastroenterology). Dr. Rojany is currently accepting new patients.
Neal P. Dixon, MD Private Practice
Offers high-quality, individualized care with compassion. Believes communication and collaboration with patients is the foundation for effective relationships. Through effective education, patients are empowered to partner in their care and achieve their health goals. Dr. Dixon is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 10 other conditions, according to our data. His clinical expertise encompasses Choledocholithiasis, Hernia, Breast Cancer, Hernia Surgery, and Colostomy. Dr. Dixon is board certified in Surgery General Surgery. Dr. Dixon is currently accepting new patients.
General Surgery Medical Group
Offers high-quality, individualized care with compassion. Believes communication and collaboration with patients is the foundation for effective relationships. Through effective education, patients are empowered to partner in their care and achieve their health goals. Dr. Lopresti is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 10 other conditions, according to our data. His clinical expertise encompasses Choledocholithiasis, Gallstones, Gallbladder Disease, Bladder Reconstruction, and Hernia Surgery. Dr. Lopresti is board certified in Surgery General Surgery. Dr. Lopresti is currently accepting new patients.
Isaac E. Lowe, MD Private Practice
Offers high-quality, individualized care with compassion. Believes communication and collaboration with patients is the foundation for effective relationships. Through effective education, patients are empowered to partner in their care and achieve their health goals. Dr. Lowe is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses Seasonal Affective Disorder (SAD), Gallbladder Disease, Gallstones, Hernia Surgery, and Small Bowel Resection. Dr. Lowe is board certified in Surgery General Surgery. Dr. Lowe is currently accepting new patients.
Ventura County Gastroenterology Group
Jay Guan is a Gastroenterologist practicing medicine in Camarillo, California. Dr. Guan is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 2 other conditions, according to our data. His clinical expertise encompasses Hemorrhoids, Hiatal Hernia, Congenital Diaphragmatic Hernia, Colonoscopy, and Gastrectomy. Dr. Guan is board certified in Internal Medicine. Dr. Guan is currently accepting new patients.
Laya Nasrollah is a Gastroenterologist practicing medicine in Camarillo, California. Dr. Nasrollah is rated as an Experienced provider by MediFind in Colonoscopy. She is also highly rated in 35 other conditions, according to our data. Her clinical expertise encompasses Gastroesophageal Reflux Disease (GERD), Familial Adenomatous Polyposis, Diarrhea, Endoscopy, and Gastrectomy. Dr. Nasrollah is currently accepting new patients.
General Surgery Medical Group Of Ventura County
Dr. Tuai attended Ohio State University, College of Medicine after he received his Undergraduate Degree in Biochemistry at UC Davis in 1992. He completed his general surgery residency at UC San Francisco/Fresno, where he spent a year as a clinical instructor in the Department of Surgery, before beginning a private practice in Chino. He joined the Group in December, 2004.Dr. Tuai is a Board Certified surgeon and a Fellow of the American College of Surgeons who has extensive experience with advanced laparoscopic and minimally invasive techniques including robotic surgery.Dr. Tuai's passion is minimally invasive surgeries, especially involving the colon, stomach, gall bladder, and hernias. He is fluent in Mandarin Chinese and Korean.Offers high-quality, individualized care with compassion. Believes communication and collaboration with patients is the foundation for effective relationships. Through effective education, patients are empowered to partner in their care and achieve their health goals. Dr. Tuai is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 21 other conditions, according to our data. His clinical expertise encompasses Hernia, Gallstones, Choledocholithiasis, Hernia Surgery, and Ileostomy. Dr. Tuai is board certified in Surgery General Surgery. Dr. Tuai is currently accepting new patients.
Advanced Gastroentrology Inc
Telehealth visits are available.Our mission is to build patient trust and to be the catalyst for a healthier lifestyle through prevention, early detection and our innovative approach to GI care.. Dr. Simoni is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 6 other conditions, according to our data. His clinical expertise encompasses Malabsorption, Visceromegaly, Trichohepatoenteric Syndrome, Endoscopy, and Colonoscopy. Dr. Simoni is board certified in Internal Medicine and Internal Medicine (Sub: Gastroenterology). Dr. Simoni is currently accepting new patients.
Ventura County Gastroenterology Group
Justin Marasigan is a Gastroenterologist practicing medicine in Oxnard, California. Dr. Marasigan is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 17 other conditions, according to our data. His clinical expertise encompasses Familial Adenomatous Polyposis, Turcot Syndrome, Gardner Syndrome, Gastrectomy, and Colonoscopy. Dr. Marasigan is board certified in American Os Bd Internal Medicine and American Os Bd Internal Medicine (Sub: Gastroenterlogy). Dr. Marasigan is currently accepting new patients.
Arroyo Oaks Medical Associates, Inc
Russell Hines is a primary care provider, practicing in Internal Medicine in Thousand Oaks, California. Dr. Hines is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 32 other conditions, according to our data. His clinical expertise encompasses Glucocorticoid-Remediable Aldosteronism, Familial Hypertension, Hypertension, Colonoscopy, and Endoscopy. Dr. Hines is currently accepting new patients.
Arroyo Oaks Medical Associates, Inc
Amit Monga is a primary care provider, practicing in Internal Medicine in Thousand Oaks, California. Dr. Monga is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 12 other conditions, according to our data. His clinical expertise encompasses Familial Hypertension, Hypertension, Glucocorticoid-Remediable Aldosteronism, Endoscopy, and Pacemaker Implantation. Dr. Monga is currently accepting new patients.
Sound Physicians
Garry Forkosh is a primary care provider, practicing in Internal Medicine in Thousand Oaks, California. Dr. Forkosh is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 3 other conditions, according to our data. His clinical expertise encompasses Sepsis, Malnutrition, Supravalvular Aortic Stenosis, Gastrostomy, and Endoscopy. Dr. Forkosh is currently accepting new patients.
Alister A George, MD
Alister George is a Gastroenterologist practicing medicine in Thousand Oaks, California. Dr. George is rated as an Advanced provider by MediFind in Colonoscopy. He is also highly rated in 20 other conditions, according to our data. His clinical expertise encompasses Esophagitis, Gastroesophageal Reflux Disease (GERD), Gastric Dysmotility, Endoscopy, and Colonoscopy.
Erik C. Spayde M.D. Inc.
Eric Lee is a Pain Medicine provider practicing medicine in Thousand Oaks, California. Dr. Lee is rated as an Advanced provider by MediFind in Colonoscopy. He is also highly rated in 2 other conditions, according to our data. His clinical expertise encompasses Neuralgia, Cervical Spondylosis, Invertebral Disc Disease, Colonoscopy, and Endoscopy.
Kumar Desai MD Inc.
Kumar Desai is a Gastroenterologist practicing medicine in Thousand Oaks, California. Dr. Desai is rated as an Advanced provider by MediFind in Colonoscopy. He is also highly rated in 6 other conditions, according to our data. His clinical expertise encompasses Jaundice, Trichohepatoenteric Syndrome, Gallbladder Disease, Endoscopy, and Colonoscopy.
Jasbir Tiwana, MD
Jasbir Tiwana is an Internal Medicine provider practicing medicine in Simi Valley, California. Dr. Tiwana is rated as an Advanced provider by MediFind in Colonoscopy. He is also highly rated in 3 other conditions, according to our data. His clinical expertise encompasses Gallbladder Disease, Respiratory Syncytial Virus (RSV) Infection, Liver Failure, Colonoscopy, and Gastrostomy. Dr. Tiwana is currently accepting new patients.
Thrive Neuropsychology Inc.
Pedram Bagheri is an Internal Medicine provider practicing medicine in Newbury Park, California. Dr. Bagheri is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 2 other conditions, according to our data. His clinical expertise encompasses Chronic Inflammatory Response Syndrome (CIRS), Gallbladder Disease, Pediatric Low-Grade Glioma (pLGG), Endoscopy, and Gastrostomy.
St. John's Regional Medical Center
Mahsa Nashid is a Geriatrics provider practicing medicine in Oxnard, California. Dr. Nashid is rated as an Experienced provider by MediFind in Colonoscopy. Her clinical expertise encompasses Gallbladder Disease, Chronic Inflammatory Response Syndrome (CIRS), Endoscopy, and Ureteroscopy.
Sound Physicians
Offers high-quality, individualized care with compassion. Believes communication and collaboration with patients is the foundation for effective relationships. Through effective education, patients are empowered to partner in their care and achieve their health goals. Dr. Nguyen is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 2 other conditions, according to our data. His clinical expertise encompasses Liver Failure, Chronic Inflammatory Response Syndrome (CIRS), Gallbladder Disease, Gastrostomy, and Endoscopy. Dr. Nguyen is board certified in Internal Medicine. Dr. Nguyen is currently accepting new patients.
Last Updated: 04/28/2026






