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 multiple residencies 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. He specializes in treating arthritis conditions, particularly osteoarthritis and thumb arthritis that affect hand function. His expertise includes performing bursa injections to reduce inflammation and ordering extremity X-rays for accurate diagnosis. Patients have given Dr. Masem an average rating of 3.8 out of 5 on Vitals.
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Quick Facts

  • accepting new patients
  • 3.8
  • 51 years of experience
  • 46 insurance plans accepted
  • speaks English
  • Harvard Medical School
  • 8 written reviews
  • 1 specialty
  • 12 areas of expertise
  • 2 board certifications
  • 1 hospital affiliation
  • 1 office location
  • Male

Office Location

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Dr. Mathias A. Masem, MD
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Dr. Mathias A. Masem, MDDr. Jay Parkin, MDDr. Robert Peterson, MDDr. Stuart Goodman, MD, PhD
Orthopedic SurgeryOrthopedic SurgeryOrthopedic SurgeryOrthopedic Surgery
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
3.8 
2.2 
3.1 
4.1 
51 Years of Experience 38 Years of Experience 34 Years of Experience 48 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English Speaks Spanish, English Speaks English Speaks Spanish, English
San Francisco , CAFairfield , CAVacaville , CARedwood City , CA
Med School: University of Minnesota Medical School Med School: Stanford University School Of Medicine Med School: Albert Einstein College Of Medicine Of Yeshiva University Med School: Univ Of Toronto Fac Of Med
Current Profile
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Insurance Plans Accepted by Dr. 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

Dr. Mathias A. Masem has the following specialty

Specialty Expertise

Dr. 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

BOARD CERTIFICATIONS

American Board of Orthopaedic Surgery

Orthopaedic Surgery

MEDICAL LICENSE

Medical Doctor, California, 2026, Active

EDUCATION & TRAINING

Fellowship

Harvard Medical School1987
Medizinische Hochschule Hannover1986
UCSF1983

Residency

Robert Wood Johnson University Hospital1980
UCSF1978
UCSF1976

Medical School

University of Minnesota Medical SchoolGraduated in 1975

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Frequently Asked Questions

Is Dr. Mathias Masem accepting new patients?
Dr. Mathias Masem is accepting new patients on Vitals. View Dr. Mathias Masem's profile on Vitals to make an appointment.
Does Dr. Mathias Masem accept my insurance?
You can see the insurance plans that Dr. Mathias Masem accepts on their Vitals profile.
What languages does Dr. Mathias Masem speak?
Dr. Mathias Masem speaks English.
Where is Dr. Mathias Masem's office located?
Dr. Mathias Masem's office is located at 1500 Owens St, San Francisco, CA, 94158.
Which hospitals is Dr. Mathias Masem affiliated with?
Dr. Mathias Masem is affiliated with Alameda Hospital.

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