Derek earned a Bachelor of Science in Biochemistry and Molecular Biology with a minor in Physics from California Lutheran University. He went on to receive his Master of Physician Assistant Studies from Sacred Heart University. Along with specializing in orthopedics, Derek also has experience in allergy, asthma and immunology medicine.

Striving for individualized care with compassion, Derek believes that communication and collaboration with patients are the foundation for effective relationships. He also believes patient education helps empower patients to be active and partner in their own health to achieve their goals.

Originally from Thousand Oaks, Derek lives in Moorpark with his wife and dog. In his free time, he enjoys hiking and camping in state and national parks. A classically trained concert cellist, Derek is a member of the Los Angeles Doctors Symphony Orchestra.

Derek Andrzejewski

Simi Valley


Thousand Oaks Clinic & Therapy Services have moved into a brand new, state-of-the-art facility!New Location