Portrait of Mark M. Moasser
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Mark M. Moasser, MD

Breast Medical Oncology
Breast Cancer Mission Bay
415-353-7070
Portrait of Mark M. Moasser
Portrait of Mark M. Moasser
ucsf logo

Mark M. Moasser, MD

Breast Medical Oncology
Breast Cancer Mission Bay
415-353-7070

On this page

About me

Dr. Mark Moasser is a medical oncologist specializing in breast cancer treatment and research. In the laboratory, he works to develop more effective therapies for breast cancer and designs clinical trials (studies to evaluate potential therapies) that he then brings to the clinic.

Moasser earned his medical degree from Tufts University School of Medicine. He completed his residency and fellowship training at New York–Presbyterian Hospital and Memorial Sloan Kettering Cancer Center.

Moasser has published his work in numerous scientific journals. He regularly presents his research findings at scientific meetings.

Education & training

Board certification

  • Medical Oncology, American Board of Internal Med/Medical Oncology

Fellowship

  • Memorial Sloan-Kettering Cancer Center

Residency

  • New York Hospital

Internship

  • New York Hospital

Degree

  • MD, Tufts University School of Medicine

My expertise

Locations

    Reviews

    Average rating

    4.8
    4.8 out of 5 Stars
    131 ratings
    About provider reviews

    Showing 1-6 of 25 reviews

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    • 5 out of 5 Stars
      March 24, 2026

      Best expert care in town. I feel supported and cared for by the provider. Care is extremely knowledgeable and compassionate

    • 5 out of 5 Stars
      March 24, 2026

      Dr. Moasser has been my oncologist for almost 10 years. He's absolutely brilliant and very kind.

    • 5 out of 5 Stars
      March 24, 2026

      Dr Moasser is the best.

    • 5 out of 5 Stars
      March 23, 2026

      I have been getting excellent care and concern for 4 years

    • 5 out of 5 Stars
      December 9, 2025

      Compassionate, expert and professional care

    • 4.8 out of 5 Stars
      November 12, 2025

      I love how straightforward, data driven and confident Dr Moasser is when explaining things to me and giving me my treatment options and recommendations. He also through his confidence makes me feel hope, which is hard to feel when going through cancer treatment.

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