Male 66 years


Dr. Dirk R Diefendorf, MD



Orthopedic Surgery   -  California,  San Mateo

 Overview

Dr. Dirk R Diefendorf, MD works in San Mateo, California is a specialist in Orthopedic Surgery and graduated Northwestern University The Feinberg School Of Medicine in 1983. Dr. Diefendorf is affiliated with Mills - Peninsula Health Services, Mills Health Center, Northridge Hospital Medical Center, Sequoia Hospital and practicing for 40 years

 Specialties

  • Orthopedic Surgery

 Conditions

• Arm Fracture (incl. Elbow and Shoulder)
• Asherman Syndrome
• Autoimmune Hemolytic Anemia (AIHA)
• Barium Enema
• Biceps Tendinitis
• Blepharophimosis - Ptosis - Epicanthus Inversus Syndrome
• Blood in Semen (Hematospermia)
• Chronic Airway Obstruction
• Chronic Graft vs Host Disease
• Complex Pediatric Spine Surgery
  ...
• Complex Spinal Instrumentation Procedure
• Corneal Tattooing
• Dog Allergy
• Dry Skin
• Dust Mite Allergy
• Ectropion of Eyelid
• Endometrial Ablation
• Endometrial Stromal Sarcoma
• Endoscopic Procedure
• Enlarged Turbinates
• Erythema
• Ewing's Sarcoma
• Food Additive Adverse Reaction - Chocolate
• Food Additive Adverse Reaction - Citric Acid Intolerance
• Food Additive Adverse Reaction - Food Additives
• Food Additive Adverse Reaction - Sulphite
• Food Additive Allergy
• Food Additive Allergy - Amaranth
• Food Allergy - Carp
• Gastric Lymphoma
• Generalized Pustular Psoriasis
• Hemofiltration
• Herniated Disc Procedure
• Hyperglycemia
• Hypertensive Retinopathy
• Iatrogenic Pneumothorax
• Infertility Surgery
• Insect Sting Allergies
• Invasive Lobular Carcinoma
• Lumbar Spine Surgery
• Medial Tibial Stress Syndrome
• Mood Changes
• Multiple Sclerosis Therapy
• Neurological Injuries
• Ovarian Insufficiency Due to FSH Resistance
• Oxycontin Addiction
• Patent Foramen Ovale (PFO)
• Pediatric Thoracic Disorders
• Pigeon-Breeders' Disease
• Pneumatic Dilations (PD)
• Retinal Neovascularization
• Retrobulbar Neuropathy
• Rheumatoid Arthritis
• Sinus Polyp
• Skin Aging
• Spinal Anesthesia
• Steppage Gait
• Stress Test
• Third-Degree Burns
• Upper Airway Obstruction
• Ureteral Stones
• Wart Removal
 more details

 Procedures

• ACL (Anterior Cruciate Ligament) Surgery
• Adhesive Capsulitis
• Ankle Arthroscopy
• 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)
• Back Pain
• Baker’s Cyst
• Bursitis
  ...
• Calcium Pyrophosphate Deposition Disease
• Carpal Tunnel Syndrome
• Chondromalacia of the Patella (Runner's Knee)
• Chronic Pelvic Pain
• Complications of Joint Prosthesis
• Degenerative Disc Disease
• Elbow Fracture and Dislocation Treatment
• Elbow Fracture and-or Dislocation Treatment, Open
• Elbow Sprain
• Enthesopathy of Hip (incl. Trochanteric Bursitis)
• Excision of Femur or Knee
• Femur Fracture
• Foot and Ankle Fracture and Dislocation Treatment
• Foot and Ankle Fracture Treatment, Open
• Foot Fracture
• Fracture of Hand (incl. Fingers)
• Gait Abnormality
• Glenoid Labrum Tear
• Gout
• Hand and Wrist Fracture and Dislocation Treatment
• Hand Fracture
• Hip Fracture
• Hip Fracture and Dislocation Treatment
• Hip Fracture and-or Dislocation Treatment, Closed
• Hip Fracture and-or Dislocation Treatment, Open
• Hip Replacement
• Hip Resurfacing
• Hip Sprain
• Internal Derangement of Knee
• 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 Dislocation (incl. Meniscal Tear)
• Knee Fracture
• Knee Replacement
• 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
• Myofascial Trigger Point Injection
• Nerve Block, Somatic
• Non-Spinal Nerve Blocks
• 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
• Osteopenia
• Patellofemoral Pain Syndrome or Knee Pain
• Pelvic Fracture
• Peripheral Nerve Disorders
• Plantar Fasciitis
• Resection or Ablation of Bone Tumor, Partial or Complete Resection of Bone, Debridement of Bone
• Rheumatoid Arthritis
• Rotator Cuff Surgery
• Rotator Cuff Tear
• Scapular Fracture
• Sciatica (Not Due to Disc Displacement)
• Shoulder Arthroscopy
• Shoulder Dislocation
• Shoulder Dislocation Treatment
• Shoulder Fracture and Dislocation Treatment
• Shoulder Fracture Treatment
• Shoulder Impingement Syndrome
• Shoulder Tendinitis and Tenosynovitis
• Spinal Stenosis
• Sprains and Strains (incl. Muscle Tear)
• Systemic Chondromalacia
• Systemic Lupus Erythematosus (SLE)
• Tibula and Fibula Fractures
• Wrist Fracture
 more details

 Board Certifications

  • Board Certified by the American Board of Orthopaedic Surgery

 Years Since Graduation

  • 40

 State License

  • California

 Education & Training

Medical School

Northwestern University The Feinberg School Of Medicine

Chicago, IL, United States

Graduated: 1983

Fellowship Hospital

S Calif Orth Institute

Van Nuys, CA, USA

Year completed: 1989

Residency Hospital

University of Southern California

Los Angeles, CA, USA

Year completed: 1988

 Awards

1   AANA
2   Association Aos
3   CMA
4   WOA

 Dr. Diefendorf Reviews

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 Office Locations


Primary location

 Dirk R Diefendorf MD
100 South Ellsworth Avenue Suite 607
California (CA)
San Mateo
94401
 Phone:(650) 347-0517
Additional data:
Free Standing Surgery Center?    No
Office Volume:    35 patients per day
Performs Procedures On Site?    Yes

Accepting New Patients

  • Yes
* Please verify this information when scheduling an appointment.

 Map & Directions



Dirk R Diefendorf MD, 100 South Ellsworth Avenue Suite 607, San Mateo, California (CA), 94401




 Insurances Accepted (check insurance plans)

  • Access Plus Savenet
  • Advantage Preferred DirectAccess Plus PPO
  • Aetna
  • Aetna HMO
  • Blue Card PPO
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield of California
  • Blue Cross Blue Shield of California PPO
  • Blue Shield of California
  • CaliforniaCare HMO
  • Choice Plus POS
  • Choice Plus POS II
  • Cigna
  • Cigna HMO
  • Cigna PPO
  • Commercial Insurance Company
  • Employer Group HMO
  • Enhanced Exclusive for Small Business HMO
  • First Health (Coventry Health Care)
  • First Health (Coventry Health Care) PPO
  • Great West Healthcare-Cigna PPO
  • Health Net
  • Humana
  • Kaiser PHCS Network PPO
  • Local Access Plus HMO
  • Medicare
  • Medicare MCR
  • MultiPlan
  • MultiPlan PPO
  • Navigate POS
  • Open Access Plus
  • Options PPO
  • PacifiCare HMO
  • PHCS Network PPO
  • Select Plus HMO
  • Select PPO
  • United Healthcare
  • UnitedHealthCare
  • WholeCare Network HMO

* Please verify this information when scheduling an appointment.

 Blog Posts

Blog Posts for Dr. Dirk R Diefendorf, MD are not present.

 Patients Questions

Patients questions for Dr. Dirk R Diefendorf, MD are not present.

 Affiliated Hospitals


Mills - Peninsula Health Services photo


Mills - Peninsula Health Services

1501 Trousdale Drive California CA, Burlingame, 94010

Mills - Peninsula Health Services is a hospital located in Burlingame, CA. This hospital reports jointly with Mills Health Center. Therefore the ratings and awards apply to multiple hospitals and this specific hospital may not provide all rated services. Procedures/Diagnosis costs are at the state a...



Mills Health Center photo


Mills Health Center

100 South San Mateo Drive California CA, San Mateo, 94401

Mills Health Center is a hospital located in San Mateo, CA. This hospital reports jointly with Mills - Peninsula Health Services. Therefore the ratings and awards apply to multiple hospitals and this specific hospital may not provide all rated services. Procedures/Diagnosis costs are at the state av...



Northridge Hospital Medical Center photo


Northridge Hospital Medical Center

18300 Roscoe Boulevard California CA, Northridge, 91325

Northridge Hospital Medical Center is a hospital located in Northridge, CA. Procedures/Diagnosis costs are at the state average in 9 of 15 procedures. Length of Stay is at the state average in 8 of 15 procedures.






Sequoia Hospital

170 Alameda De Las Pulgas California CA, Redwood City, 94062

Sequoia Hospital is an accredited, not-for-profit community hospital providing innovative and exceptional healthcare to Bay Area residents since 1950. We offer a full range of medical, surgical and specialty programs.


 (650) 367-5551


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