Kristin Alderisio, PAC

Spine Surgery

Kristin is our senior Physician Assistant with a very extensive background in Orthopaedic Spine Surgery, Neurosurgery and Neuroscience spanning more than a decade.

After graduating from the Albany Medical College PA program in 1991, Kristin worked as a Neurosurgical Physician Assistant both in New York and Connecticut. In addition to being a first assistant on neurosurgical cases, Kristin has managed the care of patients in the NICU, step-down unit and was a part of the trauma team in the ER.

From 2001 till 2003, Kristen traveled extensively throughout Asia and volunteered her medical services both in India and Romania.

Following her time as a volunteer, Kristin worked as a Spinal Surgery Physician Assistant at Kaiser Permanente Hospital in Oakland, CA. In 2006, Kristin joined San Francisco Orthopaedic Surgeons Medical Group where she serves as a Senior Physician Assistant for the St. Mary’s Spine Center Team and sees patients in the clinic, acts as a first-assist on spine surgery cases, and provides neurological monitoring during the cases.


David Allen, DC, ATC, PA-C

Sports Medicine

David is licensed as a Physician Assistant and Chiropractor and comes to San Francisco Orthopaedic Surgeons Medical Group from Marin.

He practiced as a Chiropractor/Athletic Trainer for many years and has worked with athletes from the AVP Pro Beach Volleyball Tour, Marin Catholic High School, NCAA Track and Field Championships, and the University of San Francisco.
Additionally, David did an internship as an Athletic Trainer (ATC) with the San Francisco Forty-Niners in 2003. He currently is finishing his Masters Degree in Sports Medicine from the University of Nebraska. He obtained his Bachelors of Applied Arts and Sciences Degree in Physical Education/Kinesiology from San Diego State University, his Doctor of Chiropractic degree from Palmer West Chiropractic College, and he graduated in Physician Assistant studies from UC Davis.

He works primarily with Dr. Montgomery in Sports Medicine, but also assists Dr. Kondrashov and Dr. McGann when needed.



Mylinh Bui, PAC

Spine Surgery

Mylinh Bui is an integral part of the St. Mary’s Spine Center. She is actively involved in both pre- and post-operative care of spine patients, in addition to providing neurological monitoring and first-assisting in spine surgery.

After receiving her Bachelor’s Degree in Biology from the University of California at Davis in 2000, Mylinh went on to receive her Master’s Degree from Western University of Health and Sciences in Pomona. In 2003, Mylinh joined San Francisco Orthopaedic Surgeons Medical Group and, as part of the Spine Center team, has been one of the principal Clinical Research Study Coordinators for the X-STOP, Flexicore and Prodisc clinical trials.

San Francisco Orthopaedic Surgeons
spine surgery, joint replacement, and sports medicine

One Shrader Street, Suite 650
San Francisco, CA 94117

One Shrader Street, Suite 450
San Francisco, CA 94117
415-750-5570 (Spine Center)