Orthopedic Surgeon

Dr Semon Bader


  • Walnut Creek

  • Brentwood

  • Concord


“I enjoy building relationships with my patients and helping them regain function and maintain their quality of life, whether they are elite athletes, weekend warriors, or older adults.”


Can I See Dr Bader?

    2405 Shadelands Drive
    Walnut Creek CA 94598

  • Monday – Thursday
    8:00 AM – 5:00 PM

    8:00 AM – 4:00 PM

    1800 Sutter Street, Suite 100
    Concord CA 94520

  • Monday – Thursday
    8:00 AM – 5:00 PM

    8:00 AM – 4:00 PM

    350 John Muir Parkway
    Brentwood CA 94513

  • Monday – Thursday
    8:00 AM – 5:00 PM

    8:00 AM – 4:00 PM


With Dr Bader


About Dr Bader

Dr. Bader grew up in the Bay Area and attended the University of California, Davis, where he majored in neurobiology, physiology and behavior and graduated with the highest honors. Dr. Bader went on to complete medical school at the University of California, Davis, and completed his Orthopedic Residency at Harbor-UCLA Medical Center in Los Angeles.

Dr. Bader then completed a one-year fellowship in Sports Medicine, Knee, Shoulder and Hip Arthroscopy at the world-renowned Cleveland Clinic Foundation. While at the Cleveland Clinic, he gained extensive experience as a team physician for local high schools, club teams and Cleveland State University. He was also a member of the medical team for the Cleveland Indians, Cleveland Cavaliers, Cleveland Browns and the NFL Combine, gaining experience in the management and care of athletes at all levels.

After his fellowship, Dr. Bader returned with his wife and three children to settle in the East Bay area. For the past five years, he has served as Chief of Orthopedic Surgery at Contra Costa Regional Medical Center in Martinez. He has published numerous peer-reviewed articles and book chapters focused on joint preservation. He has presented at regional and national conferences on the treatment of knee disorders and ACL reconstruction. Dr. Bader brings an added skill in the management of hip disorders in young adults.

In his spare time Dr. Bader enjoys golfing, hiking, biking and spending time with his family.

  • Fellowship

    • Sports Medicine

      Cleveland Clinic Education Foundation,

  • Residency

    • Orthopedic Surgery

      Harbor/UCLA Medical Center,

  • Internship

    • Surgery

      University of California, San Francisco,

  • Medical School

    • Medical Degree

      University of California, Davis,

  • College

    • B.S. – Neurobiology, Physiology & Behavior

      University of California, Davis,


About Dr Bader

G Noland
Mar 18, 2023

I destroy body parts. My last incident involved my left knee. Tore everything! So far, physical therapy is going great which means the surgery was fantastic! Thanks Dr. Bader!!

Shahrzad Monemi
Mar 02, 2023

I had my partial knee replacement surgery with Dr Bader on June 2022. I highly recommend him! He is very knowledgeable! He patiently listened and answered all my questions and concerns regarding my surgery. He was great with all my follow up appointments after surgery!

Sonia Bryce
Mar 02, 2023

Very good and awesome place I could not have asked for more better care then what they gave me excellent service. I'm very pleased with the overall service and care they gave me.i would recommend this place to anyone if you want good service go here Thank you Dr Semon Bader.

Ryann Quan
Feb 27, 2023

My experience at the office was good. I’m just awaiting approval to have my meniscus repaired. I’m looking forward to having it repaired.

Peregrin Took
Feb 27, 2023

We had a lot of problems with communication with reception here, but everyone seemed nice and understanding. However, the doctor I saw was great and incredibly helpful. All in all, the good outweighed the bad.

Mark Boehme
Feb 26, 2023

I had surgery to repair a torn meniscus root on my left knee. The surgery seems to have gone well although I was advised that I had arthritis that might affect my recovery. It has been three months on and I have Physical Therapy twice weekly which is absolutely necessary to strengthen the muscles in the leg. You also need to be consistent and do assigned home exercises as well. While sometimes frustrated that the recovery process is slower than expected, I am becoming increasingly more mobile and confident with less fatigue. Dr.Bader is a well qualified orthopedist who is well versed in this procedure. He answers your questions directly and offers options as to what procedure to have that may be best suited for your particular injury.

Feb 25, 2023

I had surgery on my left knee but the Doctor completely botched it. I was referred by my doctor, Dr Khelia over to the orthopedic specialist, Dr. Bader. I was very glad my doctor said he lived breathe in digested orthopedics that he was phenomenal! So happy to have him now. He did both of my son knees and he is perfectly fine now. I now have a tear in my meniscus in my right knee. And after my first experience, I was scared to death to ever do operational any again, but I’m very confident that if this has to happen. I am absolutely with the right doctor. He’s amazing.

Priscilla Tudor
Feb 23, 2023

I have been seeing Dr. Bader for knee issues for about 15 years., He is kind, compassionate, conscientious, a good surgeon, and also receptive to non-surgical interventions. He has my total respect and confidence.

Enrique Gutierrez
Feb 15, 2023

Dr. Bader explained with precision the diagnose with my labrum and meniscus issue. Offered paths with several options to proceed with. Greatly recommended.

Waheed Hamidi
Feb 12, 2023

Thank you Dr.Bader for your surgery my shoulder for my rotated cup. My hands is much feel better now and I can go back to work and I can do my job back again.

Assisting the Doctor:

Rick Nolley, PA-C

Physician Assistants are highly skilled medical professionals. Dr. Bader is joined by Rick Nolley, PA-C to provide the highest standard of care.

Reviews Mean So Much!

Reviews mean so much to both the doctor providing care as well as to prospective patients. We appreciate your reviews!

Both my surgeries were done by Dr Bader and he did a great job. He monitored my progress and ordered the appropriate physical therapy. He is very knowledgeable and takes great care of his patients.

- Luisa C

Doctor Bader has been my specialist for two separate problems, a frozen shoulder and a torn ACL. In both of these situations he has taken wonderful care of me.

- Matt & Jen F

In my opinion he has amazing surgical skills to have repaired my knee in which pretty much everything was completely torn. I’m so glad I found him when I needed him. Excellent doctor!

- Jackie M