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Adult Hematology and Oncology

Oncology/HematologyVentura, CA

★★★★★4.9/5684 reviews across 3 platforms

Ratings by platform

  • UCLA Health (Dr. Mahshid Melody Mosallaei-Benjamin): 4.9/5 (299 reviews (520 ratings))
  • UCLA Health (Dr. Joshua D. Rosenberg): 5.0/5 (378 reviews (644 ratings))
  • Yelp (Ventura County Hematology-Oncology Specialists): 2.5/5 (7 reviews)

What patients say

Patients praise

  • physicians described as thorough, supportive, attentive, and responsive
  • patients appreciate doctors who listen to questions and provide detailed explanations
  • some office staff praised for being caring, attentive, and helpful

Common complaints

  • complaints regarding unhelpful administrative staff and billing issues related to insurance changes
  • some patients have expressed deep dissatisfaction with care quality and communication experiences

In patients' words

"She really listens to me and is always very thoughtful when I ask her questions. I cannot say enough good things about her. Wonderful physician."

UCLA Health Patient Review

"Hands down, Dr. Rosenberg is the smartest, most attentive, clear thinking, problem solving Hematologist I have met, or had the pleasure of calling my doctor."

UCLA Health Patient Review

"I went there for 14 months and it was so bad I had nightmares and friends kept telling me I should file a malpractice lawsuit."

Yelp 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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