Portrait of Mathias A. Masem
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Mathias A. Masem, MD

Orthopedic Surgery • Hand Surgery
Hand, Elbow & Peripheral Nerve Surgery Mission Bay
415-353-2808
Portrait of Mathias A. Masem
Portrait of Mathias A. Masem
ucsf logo

Mathias A. Masem, MD

Orthopedic Surgery • Hand Surgery
Hand, Elbow & Peripheral Nerve Surgery Mission Bay
415-353-2808

On this page

About me

Dr. Mathias Masem is an orthopedic surgeon with more than 20 years of experience in surgeries of the hand and upper extremities.

Masem earned his medical degree at the University of Minnesota. He completed general surgery training and a residency in orthopedic surgery at UCSF, then completed a hand surgery fellowship under esteemed hand surgeon Dr. Jack Tupper in Oakland. He spent the following two years as an orthopedic research physician in Switzerland at the University of Bern and the Laboratory for Experimental Surgery. He furthered his training in hand and upper extremity surgery and microsurgery as a clinical and research fellow at Massachusetts General Hospital and Harvard Medical School.

In addition to his work at UCSF, Masem has a private practice in Oakland and is chief of hand surgery at Alta Bates Summit Medical Center. He also is a consultant on hand and upper extremity injuries for the University of California, Berkeley athletic teams.

Masem has authored numerous articles and given many lectures on upper extremity orthopedic surgery.

Education & training

Board certification

  • Surgery of the Hand, American Board of Orthopaedic Surgery
  • Orthopaedic Surgery, American Board of Orthopaedic Surgery

Fellowship

  • Orthopaedic Surgery, UCSF Medical Center GME/RESEARCH

Internship

  • General Surgery, UCSF Benioff Children's Hospital - Oakland GME

Degree

  • MD, University of Minnesota

Locations

    Reviews

    Average rating

    4.9
    4.9 out of 5 Stars
    128 ratings
    About provider reviews

    Showing 1-6 of 31 reviews

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    • 5 out of 5 Stars
      December 5, 2025

      Dr. Massam is very kind and attentive.

    • 5 out of 5 Stars
      October 17, 2025

      Dr Masem - incredible care and concern Care team is kind and caring very wonderful people

    • 5 out of 5 Stars
      September 19, 2025

      I was very impressed by Dr. M. He was very knowledgeable, informational and kind. He sat me down and discussed my x-rays with me and showed me where the fracture was. He gave me clear discharge planning.

    • 5 out of 5 Stars
      September 19, 2025

      Every thing was fine

    • 5 out of 5 Stars
      September 7, 2025

      Dr. Masem and his care team are amazing

    • 5 out of 5 Stars
      August 2, 2025

      I would give Dr. Masem a way higher rating would your scale not top out at "5". He is very personable, provides excellent care, and listens to / answers my questions. I am very grateful for being his patient.

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