Summary

Dr. Mathias Masem is an orthopedic surgeon who has dedicated over five decades to treating conditions of the musculoskeletal system. He earned his medical degree from the University of Minnesota Medical School and completed his residency training at UCSF and Robert Wood Johnson University Hospital. Dr. Masem pursued advanced fellowship training at prestigious institutions including Harvard Medical School, UCSF, and Medizinische Hochschule Hannover in Germany. He holds board certification in Orthopaedic Surgery from the American Board of Orthopaedic Surgery and communicates with patients in English.

Dr. Masem practices at Alameda Hospital and sees patients in San Francisco, California. His clinical expertise focuses on treating osteoarthritis and specialized hand conditions such as thumb arthritis. He performs diagnostic procedures including extremity X-rays and therapeutic treatments like bursa injections and arthrocentesis to help reduce joint pain and improve mobility. Patients have given him an average rating of 3.9 out of 5 stars on Vitals.
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Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 3.9
  • 51 years of experience
  • 46 insurance plans accepted
  • speaks English
  • Harvard Medical School
  • 9 written reviews
  • 1 specialty
  • 12 areas of expertise
  • 1 board certification
  • 1 hospital affiliation
  • 1 office location
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Location

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Mathias A. Masem, MD
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Mathias A. Masem, MDDr. Raffi Avedian, MDEmilie Cheung, MDNeil Pathare, MD
Orthopedic SurgeryOrthopedic SurgeryOrthopedic SurgeryOrthopedic Surgery
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
3.9 
4.9 
4.3 
51 Years of Experience 24 Years of Experience 26 Years of Experience 20 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English Speaks English, Spanish Speaks English, Spanish Speaks Chinese, English, Spanish
San Francisco , CARedwood City , CARedwood City , CAFairfield , CA
Med School: University of Minnesota Medical School Med School: Univ Of Chicago Division Of Biological Sciences Pritzker School Of Medicine Med School: New York Medical College Med School: Tufts University School Of Medicine
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Insurance Plans Accepted by Mathias A. Masem

  • AARP
  • Aetna
  • Aetna - HMO
  • AIG
  • Alameda Alliance for Health
  • Alignment Health Plan
  • Alignment Health Plan - HMO
  • AltaMed Senior BuenaCare (PACE)
  • Anthem Blue Cross
  • Blue Cross Blue Shield of Illinois
  • Blue Cross Blue Shield of Oklahoma
  • BLUE CROSS of CALIFORNIA
  • BLUE CROSS of CALIFORNIA - HMO
  • Blue Shield of California
  • Blue Shield of California - HMO
  • CalOptima
  • Central California Alliance for Health
  • Central California Alliance for Health - Medicaid (Managed)
  • CHAMPVA
  • CHAMPVA - HMO
  • Cigna
  • Consolidated Health Plans - PPO
  • Contra Costa Health Plan
  • Corvel - Workers’ Compensation
  • Health Net
  • Health Net - HMO
  • Health Plan of San Joaquin
  • Health Plan of San Joaquin - Medicaid (Managed)
  • Humana
  • Imperial Health Plan of California
  • Integra
  • Kaiser Permanente
  • Kaiser Permanente - HMO
  • Magellan Health
  • Medicare
  • Medicare - Medicaid
  • Medicare - Medicare
  • Meritain Health
  • SCAN Health Plan
  • SCAN Health Plan - HMO
  • STLDentalPlan| LLC
  • Sutter Health Plus
  • Tricare
  • UnitedHealthcare
  • UnitedHealthcare - HMO
  • UnitedHealthcare - Medicare

Medical Specialties

Mathias A. Masem has the following specialty

Specialty Expertise

Mathias A. Masem has the following 12 areas of expertise

  • ACL Reconstruction or Anterior Cruciate Ligament Reconstruction (Bone-Patellar Tendon-Bone Graft)
  • Bone marrow inflammation (Osteomyelitis)
  • Hip Osteoarthritis
  • Hip Surgery (Hip Replacement Arthroplasty)
  • Knee Osteoarthritis
  • Knee Surgery (Knee Replacement Arthroplasty)
  • Kyphosis
  • Osteoarthritis (Hand and Wrist)
  • Scoliosis
  • Spinal Disorders
  • Spondylolisthesis
  • Sports Injuries

Certifications, License, & Education

51 Years Experience

Mathias A. Masem holds an expired medical license in the state of California. They are board certified in Orthopaedic Surgery by the American Board of Orthopaedic Surgery.

Board Certifications

Board certified in Orthopaedic Surgery by the American Board of Orthopaedic Surgery.

Medical License

Medical Doctor with an expired medical license in the state of California that expired in 2026.

Education & Training

Fellowship

Completed their fellowship at Harvard Medical School in 1987, Medizinische Hochschule Hannover in 1986, and UCSF in 1983.

Residency

Completed their residency at Robert Wood Johnson University Hospital in 1980, UCSF in 1978, and UCSF in 1976.

Medical School

Graduated from University of Minnesota Medical School in 1975.

NPI Number

Mathias A. Masem's NPI number is 1508810938.

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Frequently Asked Questions

Does Mathias Masem accept virtual/telehealth appointments?
Mathias Masem has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
What languages does Mathias Masem speak?
Mathias Masem speaks English.
Where is Mathias Masem's office located?
Mathias Masem's office is located at 1500 Owens St, San Francisco, CA, 94158.
Which hospitals is Mathias Masem affiliated with?
Mathias Masem is affiliated with Alameda Hospital.
How can I make an appointment with Mathias Masem?
You can find contact information for Mathias Masem here on Vitals.

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