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Gastroenterologist in Oxnard, CA | Colonoscopy & GI Care

GastroenterologyOxnard, CA

★★★★★4.6/5464 reviews across 5 platforms

Ratings by platform

  • Healthgrades (Dr. Karen Simon): 4.6/5 stars (133 reviews) (133)
  • Vitals (Dr. Micha Rojany): 4.3/5 stars (42)
  • Healthgrades (Dr. John Billesdon): 5.0/5 stars (14)
  • Birdeye/Google (Ventura County Gastroenterology Medical Group): 4.7/5 stars (275)
  • Vitals (Dr. Donald L. Miller): 4.8/5 stars

What patients say

Patients praise

  • Doctors described as caring, attentive listeners, and professional
  • Staff generally perceived as friendly and helpful during visits
  • Clear explanations of procedures (e.g., colonoscopy, EGD) and test results
  • Effective diagnostic and treatment outcomes reported by many patients

Common complaints

  • Difficulty scheduling appointments and long wait times for new patient visits
  • Frustrations with office communication, including lack of callbacks and follow-up on procedures
  • Occasional reports of feeling like a low priority due to insurance type (e.g., HMO)

In patients' words

"She is an extremely good listener and goes out of her way to ensure you get all of your questions answered."

Healthgrades Review

"He takes the time to explain the procedure and answer all my questions. Dr. Rojany makes sure I am comfortable and pain free..."

Vitals Review

"I have always received good quality care, but getting an appointment has always taken months."

Demandforce Review

How these reviews were compiled

Synthesized from public patient-review platforms as of Jul 10, 2026 — sources: [1][2][3][4][5][6][7][8].

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