Summary

Dr. Dirk Diefendorf treats arthralgia, osteoarthritis, and rotator cuff disorder, and performs physical therapy, strength training, and manual therapy. He has practiced orthopedic surgery, physical medicine and rehabilitation for 43 years and is affiliated with Sequoia Hospital.

Dr. Diefendorf earned his medical degree from Northwestern University Feinberg School of Medicine and completed his residency at LAC USC Medical Center. He sees patients in Palo Alto and San Mateo, California, and speaks English and Spanish. Patients on Vitals rate Dr. Diefendorf 4.18 out of 5.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 4.2
  • 43 years of experience
  • 33 insurance plans accepted
  • speaks English, Spanish
  • Lac Usc Medical Center
  • 8 written reviews
  • 3 specialties
  • 4 areas of expertise
  • 1 hospital affiliation
  • 7 office locations
  • Male

Patients’ Perspective

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

Office Locations

Dr. Dirk Ross Diefendorf has 7 locations

Waverley Surgery Center

400 Forest AvePalo Alto, CA 94301
Mon7:00 am - 5:00 pm
Tue7:00 am - 5:00 pm
Wed7:00 am - 5:00 pm
Thu7:00 am - 5:00 pm
Fri7:00 am - 5:00 pm
SatClosed
SunClosed

Mills Peninsula Medical Center

1501 Trousdale DrBurlingame, CA 94010

San Mateo Medical Center

222 W 39th AveSan Mateo, CA 94403

Mills Health Center

100 S San Mateo DrSan Mateo, CA 94401

Stanford Health Care

500 Pasteur DrPalo Alto, CA 94304

Stanford Hospital

300 Pasteur DrPalo Alto, CA 94304

Stanford Medicine Pediatrics

453 Quarry Rd # Mc5660Palo Alto, CA 94304

Compare with Similar Doctors

Dr. Dirk Ross Diefendorf, MD
Stephanie Pun, MD
Dr. Robert Steffner, MD
Derek F. Amanatullah, MD, PhD
Dr. Dirk Ross Diefendorf, MDStephanie Pun, MDDr. Robert Steffner, MDDerek F. Amanatullah, MD, PhD
Orthopedic SurgeryOrthopedic SurgeryOrthopedic SurgeryOrthopedic Surgery
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
4.2 
3.9 
4.3 
4.3 
43 Years of Experience 19 Years of Experience 20 Years of Experience 22 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English, Spanish Speaks Chinese, English, Spanish
Palo Alto , CARedwood City , CARedwood City , CARedwood City , CA
Med School: Northwestern University Feinberg School Of Medicine Med School: University Of California San Francisco School Of Medicine Med School: Wayne State University School Of Medicine Med School: Albert Einstein College Of Medicine Of Yeshiva University
Current Profile
View Profile View Profile View Profile

Insurance Plans Accepted by Dr. Dirk Ross Diefendorf

  • Accepts Medicaid
  • AARP
  • Aetna
  • Aetna - HMO
  • Alignment Health Plan
  • AltaMed Senior BuenaCare (PACE)
  • Anthem Blue Cross
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield of Illinois
  • Blue Cross Blue Shield of Oklahoma
  • BLUE CROSS of CALIFORNIA
  • Blue Shield of California
  • Cigna
  • Contra Costa Health Plan
  • Health Net
  • Health Net - HMO
  • Health Plan of San Mateo
  • Health Plan of San Mateo - Medicaid
  • Humana
  • Humana - HMO
  • Kaiser Permanente
  • Magellan Health
  • Medicare
  • Medicare - Medicaid
  • Medicare - Medicare
  • Meritain Health
  • Nippon Life Benefits
  • PreferredOne
  • Santa Clara Family Health Plan
  • Sutter Health Plus
  • United American
  • UnitedHealthcare
  • UnitedHealthcare - HMO
  • UnitedHealthcare - Medicare

Medical Specialties

Dr. Dirk Ross Diefendorf has the following 3 specialties

Specialty Expertise

Dr. Dirk Ross Diefendorf has the following 4 areas of expertise

  • Neuromuscular Medicine (pm & Rehab)
  • Other
  • Other Specialty
  • Physical Medicine & Rehabilitation

Certifications, License, & Education

43 Years Experience

Dr. Dirk Ross Diefendorf holds an expired medical license in the state of California.

Medical License

Medical Doctor with an expired medical license in the state of California that expired in 2025.

Education & Training

Residency

Completed their residency at Lac Usc Medical Center.

Medical School

Graduated from Northwestern University Feinberg School Of Medicine in 1983.

NPI Number

Dr. Diefendorf's NPI number is 1467559443.

Similar doctors

Frequently Asked Questions

Is Dr. Dirk Diefendorf accepting new patients?
Dr. Dirk Diefendorf is accepting new patients on Vitals. View Dr. Dirk Diefendorf's profile on Vitals to make an appointment.
Does Dr. Dirk Diefendorf accept my insurance?
You can see the insurance plans that Dr. Dirk Diefendorf accepts on their Vitals profile.
What languages does Dr. Dirk Diefendorf speak?
Dr. Dirk Diefendorf speaks English and Spanish.
Which hospitals is Dr. Dirk Diefendorf affiliated with?
Dr. Dirk Diefendorf is affiliated with Sequoia Hospital.
Where is Dr. Dirk Diefendorf's office located?
Dr. Dirk Diefendorf's office is located at 400 Forest Ave, Palo Alto, CA, 94301.

Ensuring Data Transparency and Trust: A Guide to Vitals Doctor Listings and Reviews

Our provider data is gathered directly from physicians and publicly available databases. Providers who verify their profiles gain the ability to update information, offering additional details about their specialties,education, treated conditions, performed procedures, and accepted insurances.

Reviews on Vitals are submitted by users only. Recognizing the valuable insights these reviews offer into a doctor's reputation, we maintain internal policies and protocols to ensure the quality and accuracy of all reviews. Importantly, providers cannot delete or alter reviews independently. Reviews can only be deleted or changed following an internal assessment by our customer service team.

Your feedback is highly valued and we encourage you to contact our support team should you encounter any issues.