Justin Marasigan, DO

Justin Marasigan, DO


Dr. Justin Marasigan was raised in the Los Angeles area. He earned his undergraduate degree from the University of Southern California and his medical degree from Kirksville College of Osteopathic Medicine in Missouri. Dr. Marasigan went on to complete his Internal Medicine Residency in the Detroit area and his Gastroenterology specialty training in Erie, Pennsylvania. He applied a variety of experiences from rural offices to large academic centers throughout Western Pennsylvania and Eastern Ohio. Prior to joining the team in Ventura County, Dr. Marasigan practiced Gastroenterology for 7 years in Washington State.

When he is not at work, Dr. Marasigan enjoys spending time with his wife, twin son and daughter, and dog Sadie.

Treatment Philosophy
My philosophy in medicine is taking a partnership-approach to each individual’s health and needs. I don’t like to tell patients what to do, but instead discuss the options, benefits and risks, and come to a decision with the patient. I was trained to treat each patient like you would a beloved family member, and I strive to do so with each visit.
Specialties and Services
  • Colonoscopy
  • Upper Endoscopy
  • Colon Cancer Screening
  • Liver Diseases
  • English
Education & Training
  • Fellowship: Gastroenterology, Millcreek Community Hospital, Erie, PA
  • Residency:Internal Medicine, St. John’s Health Osteopathic Division, Macomb, MI
  • DO: Kirksville College of Osteopathic Medicine, Kirksville, MO
Professional Affiliations
  • American College of Gastroenterology
  • American Gastroenterological Association
  • American Society for Gastrointestinal Endoscopy
  • American College of Osteopathic Internists
  • Christian Medical and Dental Association
Camarillo Office
4005 Mission Oak Blvd., Unit A
Camarillo, CA 93012
Phone: (805) 484-7921
Fax: (805) 388-5404

Oxnard Office
2241 Wankel Way, Suite A
Oxnard, CA 93030
Phone: (805) 983-0521
Fax: (805) 485-1484