--- title: "Dr. Dirk Diefendorf | Orthopedist in San Mateo, CA | Sutter Health" description: "Dr. Dirk Diefendorf, M.D. practices Orthopedic Surgery and Sports Medicine in San Mateo, CA. Accepting new patients." url: "https://www.sutterhealth.org/find-provider/dr-dirk-diefendorf-1046235163" --- 1. [Home](https://www.sutterhealth.org/) / 2. [Find a provider](https://www.sutterhealth.org/find-provider) / 3. Dirk Diefendorf, M.D. ![Dirk Diefendorf, M.D.](https://dyn.mktgcdn.com/p/on5xNp6Llfvdh4TFbZ-0Io53brE5PkMkji5s99Yr1EA/1.0000/fit=crop,gravity=auto,dpr=2,width=230,height=230) # Dirk Diefendorf, M.D. ## Orthopedic Surgery - Accepting new patients ## Sports Medicine - Accepting new patients [101 S. San Mateo Dr.Suite 212San Mateo, CA 94401](https://www.google.com/maps/dir/?api=1&destination=101+S.+San+Mateo+Dr.+San+Mateo%2C+CA+94401+US) ## Schedule appointment [650-347-0517](tel:+16503470517) Jump to: - [About](https://www.sutterhealth.org/find-provider/dr-dirk-diefendorf-1046235163#provider-about) - [Insurance](https://www.sutterhealth.org/find-provider/dr-dirk-diefendorf-1046235163#provider-health-plans) - [Locations](https://www.sutterhealth.org/find-provider/dr-dirk-diefendorf-1046235163#provider-locations) - [Services](https://www.sutterhealth.org/find-provider/dr-dirk-diefendorf-1046235163#provider-services) ## About Dr. Diefendorf Languages English and Spanish Gender Male Ages treated All ages Uses [My Health Online](https://www.sutterhealth.org/patient-resources/my-health-online) for scheduling and messaging ## Education and training **Medical school:** Northwestern University School of Medicine **Internship:** University of Southern California **Residency:** University of Southern California **Fellowship:** Southern California Orthopedic Institute, Sports Medicine/Arthroscopic Surgery ## Board certifications - Orthopedic Surgery - Board Certified ## Affiliations ### Hospitals - Sutter Mills Peninsula Medical Center ### Other - Mills-Peninsula Medical Group ## Accepted insurance Search plan or carrier name **Aetna (1 plan)** ### Aetna - Aetna Value Network HMO (AVN) **Alignment (4 plans)** ### Alignment - Alignment Health Plan My Choice (Medicare Advantage PPO) - Alignment Health Sutter Advantage +More (Medicare Advantage HMO) - Retiree Options (Medicare Advantage HMO) - Retiree Options (Medicare Advantage PPO) **Anthem Blue Cross of California (6 plans)** ### Anthem Blue Cross of California - Advantage HMO - Anthem Blue Cross HMO Saver Small Group Plan - Anthem Blue Cross HMO, also sometimes known as California Care or Rural Cal Care (includes CalPERS Traditional HMO) - Anthem Blue Cross HMO/POS (California Care Plus) - Anthem Blue Cross Small Group HMO (also sometimes known as California Care) - Direct Access **Blue Shield of California (3 plans)** ### Blue Shield of California - Blue Shield Access+ HMO CalPERS Limited Network - Blue Shield Access+ HMO Plan - Blue Shield Added Advantage POS (Point-Of-Service) Plan**Note:** - PPO Benefit Level Coverage can vary, so we suggest confirming with your health plan and provider’s office before your visit. ## Care locations 101 S. San Mateo Dr. Suite 212 San Mateo, CA 94401 [Get directions](https://www.google.com/maps/dir/?api=1&destination=101+S.+San+Mateo+Dr.+San+Mateo%2C+CA+94401+US) [650-347-0517](tel:+16503470517) 650-347-0566 ## Areas of expertise Explore the services and treatments this provider may offer. **Clinical expertise** ### Procedures - Achilles tendon repair - Acute Fracture Management - Ankle arthroscopy - Ankle ligament reconstruction - Ankle Reconstruction Surgery - Ankle tendon repair - Anterior cruciate ligament reconstruction surgery - Arthritis of the Hip and Knee - Arthroscopic shoulder stabilization & labral repair - Articular Cartilage Restoration - Biologic Joint Reconstruction - Biologic Resurfacing - Biologic Resurfacing of the Knee - Biologic Resurfacing of the Shoulder - Carpal tunnel release - Cartilage Implantation and Transfer - Cartilage restoration - Dupuytren's Disease Treatment - Elbow arthroscopy - Elbow surgery - Elbow Tendon and Ligament Repair - Femoroacetabular impingement surgery - Fracture care - Ganglion cyst surgery - Gluteus Medius Repair - Hand & Wrist Joint Reconstruction Surgery - Hip arthroscopy - [Hip replacement surgery](https://www.sutterhealth.org/services/hip-replacement) - Hip surgery - Knee arthroscopy - Knee ligament reconstruction and realignment - [Knee replacement](https://www.sutterhealth.org/services/knee-replacement) - Knee surgery - Knee Tendon Repair - Meniscal Transplant Surgery - Meniscus repair - Microfracture Surgery - [Minimally Invasive Surgery](https://www.sutterhealth.org/services/minimally-invasive-and-robotic-surgery) - Non-Surgical Management of Orthopedic Problems - Osteochondral Allograft - Osteotomy - Peripheral Nerve Surgery - Podiatric surgery - Posterior Cruciate Ligament Reconstruction - Radial Head Arthoplasty - Reconstruction of Posterolateral Corner Injuries - Reconstructive surgery - Reverse Total Shoulder Replacement - Rotator cuff surgery - Shoulder arthroscopy - [Shoulder Replacement](https://www.sutterhealth.org/services/shoulder-replacement) - Shoulder Resurfacing - Shoulder surgery - Shoulder Tendon Repair - Sports injury prevention - Trigger finger release - Ulnar Shortening Osteotomy - Ultrasound-Guided Injections - Unicompartmental Replacement - Viscosupplementation - Wrist Arthroscopy ### Conditions - ACL tear - Ankle arthritis - [Ankle injuries](https://www.sutterhealth.org/services/foot-and-ankle) - [Ankle pain](https://www.sutterhealth.org/services/foot-and-ankle) - [Arthritis](https://www.sutterhealth.org/services/arthritis-rheumatology) - Arthritis of the knee - Avascular necrosis - Bicep tendonitis - Broken arm - Cartilage Diseases - [Complex Hand and Wrist Injuries](https://www.sutterhealth.org/services/hand-wrist-elbow) - De Quervain Tenosynovitis - Dislocated shoulder - Dupuytren's Contractures - Elbow arthritis - [Elbow pain](https://www.sutterhealth.org/services/hand-wrist-elbow) - Foot Arthritis - [Foot care](https://www.sutterhealth.org/services/foot-and-ankle) - Foot injuries - Greater Trochanteric Pain Syndrome - [Hand conditions](https://www.sutterhealth.org/services/hand-wrist-elbow) - Hip Arthritis - [Hip pain](https://www.sutterhealth.org/services/hip) - Hip Problems - Inflammatory arthritis in the hip - Injured Rotator Cuff - Knee disorders - [Knee pain](https://www.sutterhealth.org/services/knee) - Meniscal Injury - Olecranon Fracture - Osteochondral Defects - Overuse Injuries - Patellofemoral Instability - Patellofemoral pain syndrome - Posterolateral Corner Injury - Radiculitis - Rotator cuff tear - Scaphoid Fracture - Shoulder arthritis - [Shoulder disorders](https://www.sutterhealth.org/services/shoulder) - Shoulder Fracture - Shoulder impingement syndrome - Shoulder labral tear - Superior Labral Tear from Anterior to Posterior - Trauma - Women's foot health - [Wrist fractures](https://www.sutterhealth.org/services/hand-wrist-elbow) - [Wrist pain](https://www.sutterhealth.org/services/hand-wrist-elbow) - [Wrist Problems](https://www.sutterhealth.org/services/hand-wrist-elbow) ### Reasons for visit - Adolescent Athletes - Biceps Pathology - [Pediatric orthopedics](https://www.sutterhealth.org/services/pediatric-orthopedics) - Pediatric Sports Medicine - [Sports medicine](https://www.sutterhealth.org/services/sports-medicine) - Women's Sports Medicine ## Related services offered by Sutter - [Sports medicine](https://www.sutterhealth.org/services/sports-medicine) - [Sports injury and orthopedic rehabilitation](https://www.sutterhealth.org/services/sports-injury-and-orthopedic-rehabilitation) ### Disclaimer _This provider directory is provided as a convenience to you. It is not intended as a recommendation, referral or endorsement of any particular provider. Physicians are not employees or agents of Sutter Health or its subsidiaries. The information is submitted by each doctor and we make no guarantee or warranty as to the accuracy of the information. You should verify the accuracy of the information directly with the provider's office._ _All doctors on this site are in the Sutter system. 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