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Dr. Dirk Diefendorf, MD Get a Free Background Report on Dr. Dirk Diefendorf, MD. Malpractice, medical malpractice, sanctions, misconduct, credentials, and penalty or negligence information.

Specializes in Sports Medicine • Male • Age 59

100 S Ellsworth Ave Ste 607
San Mateo, CA 94401
OverviewPhone & AddressExperienceHospital QualityPatient Satisfaction

Dr. Diefendorf's Experience

Dr. Diefendorf's Care Philosophy


  • Sports Medicine
  • Adult Reconstructive Orthopedic Surgery

Board Certifications

  • Orthopaedic Sports Medicine
  • Orthopedic Surgery
  • Sports Medicine
  • ACL (Anterior Cruciate Ligament) Surgery
  • Ankle Arthroscopy
  • Ankle Fracture Repair
  • Arm Surgery
  • Arthritic Shoulder Reconstruction
  • Arthroscopic Shoulder Reconstruction
  • Arthroscopic Shoulder Repair
  • Elbow Fracture and Dislocation Treatment
  • Elbow Fracture and-or Dislocation Treatment, Open
  • Excision of Femur or Knee
  • Foot and Ankle Fracture and Dislocation Treatment
  • Foot and Ankle Fracture Treatment, Open
  • Fracture and-or Dislocation Treatment
  • Fracture Care
  • Fracture Open Reduction and Internal Fixation (ORIF)
  • Glenoid Labrum Repair
  • Hand and Wrist Fracture and Dislocation Treatment
  • Hip Fracture and Dislocation Treatment
  • Hip Fracture and-or Dislocation Treatment, Closed
  • Hip Fracture and-or Dislocation Treatment, Open
  • Hip Replacement
  • Joint Drainage
  • Knee and Leg Fracture and Dislocation Treatment
  • Knee and Lower Leg Fracture Treatment, Closed
  • Knee and Lower Leg Fracture Treatment, Open
  • Knee Arthroscopy
  • Knee Replacement
  • Knee Surgery
  • Myofascial Trigger Point Injection
  • Resection or Ablation of Bone Tumor, Partial or Complete Resection of Bone, Debridement of Bone
  • Rotator Cuff Surgery
  • Shoulder Arthroscopy
  • Shoulder Dislocation Treatment
  • Shoulder Fracture and Dislocation Treatment
  • Shoulder Fracture Treatment
  • Shoulder Reconstruction
  • Shoulder Replacement
  • Shoulder Resurfacing
  • Shoulder Stabilizations
  • Shoulder Surgery
  • Simple Fracture Care and Casting
  • Adhesive Capsulitis
  • Ankle Fracture
  • Ankle Sprain and Achilles Tendon Sprain or Rupture
  • Anterior Cruciate Ligament (ACL) or Posterior Cruciate Ligament (PCL) Tear
  • Arm Fracture (incl. Elbow and Shoulder)
  • Baker’s Cyst
  • Bone Disorders
  • Bursitis
  • Calcium Pyrophosphate Deposition Disease
  • Carpal Tunnel Syndrome
  • Chondromalacia of the Patella (Runner's Knee)
  • Complications of Joint Prosthesis
  • Elbow Injuries
  • Elbow Sprain
  • Enthesopathy of Hip (incl. Trochanteric Bursitis)
  • Femur Fracture
  • Foot Conditions
  • Foot Fracture
  • Fracture
  • Fracture of Hand (incl. Fingers)
  • Gait Abnormality
  • Glenoid Labrum Tear
  • Gout
  • Hand Conditions
  • Hand Fracture
  • Hip Fracture
  • Hip Sprain
  • Internal Derangement of Knee
  • Knee Dislocation (incl. Meniscal Tear)
  • Knee Disorders
  • Knee Fracture
  • Knee Sprain
  • Lateral and Medial Epicondylitis (Tennis and Golf Elbow)
  • Lateral Collateral Ligament (LCL) Tear
  • Leg Fracture Above Knee (incl. Hip)
  • Leg Fracture Below Knee (incl. Ankle)
  • Low Back Pain
  • Non-Unions and Malunions of Fractures
  • Osgood Schlatter Disease
  • Osteoarthritis
  • Osteoarthritis of Ankle and Foot
  • Osteoarthritis of Hand or Wrist
  • Osteoarthritis of Hands
  • Osteoarthritis of Hip
  • Osteoarthritis of Hip and Thigh
  • Osteoarthritis of Knee
  • Osteoarthritis of Shoulder
  • Patellofemoral Pain Syndrome or Knee Pain
  • Pelvic Fracture
  • Peripheral Nerve Disorders
  • Plantar Fasciitis
  • Rotator Cuff Tear
  • Scapular Fracture
  • Sciatica (Not Due to Disc Displacement)
  • Shoulder Dislocation
  • Shoulder Disorders
  • Shoulder Impingement Syndrome
  • Shoulder Tendinitis and Tenosynovitis
  • Sprains and Strains (incl. Muscle Tear)
  • Tibia and Fibula Fractures
  • Wrist Fracture

Background Check for Dr. Diefendorf

0 Malpractice Claims

  • No malpractice history found for California.
  • No sanctions history found for the years that Healthgrades collects data.

0 Board Actions

  • No board actions found for the years that Healthgrades collects data.

Awards & Recognitions


Education & Training

Medical School

Northwestern University The Feinberg School Of Medicine
Graduated in 1983

Internship Hospital

University Of Southern California
Complete in 1984

Residency Hospital

University Of Southern California
Complete in 1988

Fellowship Hospital

The Southern California Orthopedic Institute
Complete in 1989

Undergraduate Schools

Graduated in 1978

Memberships & Professional Affiliations

Professional Affiliations

California Orthopaedic Association , Member
The California Orthopaedic Association is the largest statewide association representing orthopaedic surgeons in California. Orthopaedic surgeons evaluate and treat all types of musculoskeletal injuries and conditions. This includes surgical and non-surgical treatment of the spine, hip, knee, ankle, foot, shoulder, elbow and hand. The Association assists our members by providing continuing medical education and other resources that enhance their ability to provide high value quality health care.

Languages Spoken by Dr. Diefendorf & Staff

  • English
  • Spanish

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