The Best Education and Training leads to Optimal Patient Outcomes!

Meet Our Team

Dr. James Petros is the Founder and Chief Executive Officer of Allied Pain & Spine Institute and Managing Member of Trinity Surgery Center. In addition to healthcare executive responsibilities, Dr. Petros continues to also fulfill his professional passion actively for treating new and established patients with the most advanced pharmacologic, rehabilitative, restorative, and minimally invasive solutions available today. His clinical goal in every case is simple: diagnose root cause and maximize quality of life in the most efficient, conservative, and cost-effective way possible— one customized step at a time.


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Dr. Parish Vaidya joined Allied Pain & Spine Institute as an Interventional Pain Specialist in 2015. Based on his stellar track record in patient care, leadership qualities, love for teaching, and refined knowledge and experience in comprehensive pain management, he was named Chief Medical Officer of Allied Pain & Spine Institute in 2019.

Dr. Vaidya’s personable and whole-person approach coupled with outstanding dedication to compassionate healing set the new standard in state-of-the-art pain care. His caliber and diversity of skill in interventional pain management, non-surgical & regenerative musculoskeletal/orthopedics, electrodiagnostics, and integrative medicine are matched by a rare few across the country.


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Dr. Kristine Watford is a double-board certified Anesthesiologist and Interventional Chronic Pain Specialist who joined Allied Pain & Spine Institute in 2019. A graduate of the University of Washington School of Medicine, Dr. Watford completed her residency training at University of Miami/Jackson Memorial Hospital where she received several accolades, including multiple Resident of the Year awards. Dr. Watford then went on to complete her subspecialty fellowship in Interventional Chronic Pain Management at Stanford University, where she received comprehensive training from nationally recognized experts in the field of Pain Medicine.


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Dr. Richard Keyme is a double-board certified physician with a special interest in low back pain, because he has been personally living with it for the last 20 years. He graduated from University of Pennsylvania with degrees in Biomedical Science and Psychology, then taught high school for 3 years as a science teacher, then earned his medical degree from University of Illinois in 2013, followed by completing residency at Stanford University in 2017. During medical school, he received Granville A. Bennett award for excellence in medical education and represented the student body during all 4 years.


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Board-certified in Physical Medicine and Rehabilitation, Sports Medicine, and Electrodiagnostic Medicine.

Patrick Wong, MD, board-certified in physical medicine and rehabilitation and Fellowship-trained in sports medicine and interventional spine procedures, specializes in nonsurgical treatment of musculoskeletal injuries, back pain, and neuromuscular injuries.

In 2001, Dr. Wong received his bachelor’s degree in molecular cell biology from the University of California at Berkeley. In 2005, he earned his medical degree from The Chicago Medical School at Rosalind Franklin University of Medicine and Science.


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Dr. Jessica Zhang is board certified anesthesiologist with board eligibility in Pain Medicine. She received her medical degree at the University of Connecticut along with a Masters in Business Administration. Dr. Zhang then completed an anesthesiology residency at Dartmouth Hitchcock Medical Center where she trained under world renowned experts in ultrasound guided injections. During her time there, she also conducted research on low dose naltrexone which she later presented at an American Society of Regional Anesthesia annual conference. She has also conducted research on Parkinson’s disease at the National Institutes of Health. She then completed her fellowship in pain medicine at Mt. Sinai West/Morningside in NYC where she had broad training in all areas of pain management. Notably, she worked with one of the few physicians who specializes in pelvic pain management.

Dr. Zhang sees patients for all pain conditions but maintains a special interest in pelvic pain treatment. She approaches the patient holistically to come up with an individualized plan that addresses both pain and overall wellness.

Originally from Connecticut, she enjoys spending time with her family, cooking, gardening, and traveling.

She is currently accepting new patients at all Allied office locations and is eager to work with her patients on their journey to a healthier and more functional life.


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Dr. Sherwin Hua brings nearly a decade of experience treating patients with complex spine and brain disorders. He has performed over 3,000 surgeries since finishing Residency at Johns Hopkins Hospital in 2005 and has taken care of thousands of patients with neurosurgical and pain issues. He brings this wealth of experience into every consultation at Allied Pain & Spine Institute and into every surgery at Trinity Surgery Center. Every patient and situation are different, and so Dr. Sherwin Hua practices the art of neurosurgery one patient at a time.


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Dr. Bryan McCleve is a board-certified Anesthesiologist who joined Allied Pain & Spine Institute in 2020. He works primarily through Allied‘s affiliated ambulatory surgery center, serving as co-director of Anesthesia Services at Trinity Surgery Center.

Dr. McCleve attended Stanford University for his undergraduate studies, and as a student-athlete, competed at the highest levels in springboard diving. He was awarded his Medical Doctorate at University of Utah School of Medicine before setting off for specialized training in anesthesia– with emphasis in acute pain management, regional anesthesia, and pediatric anesthesia– at the Medical College of Virginia.


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Lorenzo Pavoloni is a board-certified Physician Assistant specializing in Pain Medicine. He joined Allied Pain & Spine Institute in 2021.

Born and raised in Saint Paul, Minnesota, Lorenzo attended the University of Wisconsin-Madison where he earned his Bachelor of Arts degree in Psychology. During his undergraduate studies, Lorenzo worked with pediatric patients with developmental disorders, providing them with valuable resources for job and housing placement. Lorenzo has also accumulated numerous hours as a Medical Scribe in the emergency department and held a position as a Certified Nursing Assistant (CNA) where he delivered care to patients recovering from inpatient orthopedic procedures. During his time as a CNA, he joined a multidisciplinary quality improvement team that aimed to reduce patient pain levels through holistic interventions and policy changes.


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Rachelle Dudero is a board-certified Physician Assistant specializing in Pain Medicine. She joined Allied Pain & Spine Institute in 2020.

Born and raised in the Bay Area, Rachelle earned her Bachelor of Science degree in Kinesiology with an emphasis in Athletic training and minor in Nutritional Sciences from San Jose State University. Rachelle had always had an interest in sports/musculoskeletal injuries and a passion for functional rehabilitation. During her undergraduate studies, Rachelle interned with the San Jose State University football sports medicine staff. There she was able to learn how to respond to acute sport injuries and observe multiple treatment options. While applying for graduate school, she accumulated numerous hours as a physical therapy trainer assisting patients with rehabilitative and corrective exercises as well as applying therapeutic modalities to help promote healing and to manage both acute and chronic pain. She then proceeded to earn her Master of Physician Assistant Sciences degree at Saint Francis University in Loretto, Pennsylvania. There she gained clinical practice experience in many different specialties to include Trauma/General Surgery, Emergency Medicine, and Orthopedics.


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Dr. Raeda Joudy is an experienced licensed Clinical Psychologist who joined Allied Pain & Spine Institute in 2020. Guided by her philosophy that a mind, body, and spiritual approach towards healing can be ubiquitously transformative, she is impassioned in coaching patients at Allied Pain & Spine Institute to engage emotional coping skills, realize increased daily function, and enjoy a higher quality of life.

Dr. Joudy obtained her Ph.D. in Clinical Psychology, with emphasis in Health Psychology/Chronic Pain, from Pacific Graduate School of Psychology at Palo Alto University in 2008. She then completed intensive post-doctoral training at El Camino Hospital and CHAC to further advance her clinical skills.


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Jacqueline Guzman is a California State Board Licensed Acupuncturist, Diplomate of Oriental Medicine, and board-certified National Health & Wellness Coach. Pursuing her passion to provide care in an integrated and patient-centric setting, Jacqueline joined the team at Allied Pain & Spine Institute in 2021.

After obtaining her Bachelor of Science degree in Biology, with concentration in Physiology and Health Education from San Francisco State University, Jacqueline went on to complete her Master in Science degree in traditional Chinese Medicine in 2016 at the American College of Traditional Chinese Medicine at CIIS.


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Yetinayet Dagne is a board-certified Family Nurse Practitioner specializing in pain medicine. She joined Allied Pain & Spine Institute in 2022.

Yetinayet was born in Ethiopia and raised in the Bay Area for the past 20 years. She attended San Jose State University where she earned her Bachelor of Science degree in Nursing with a minor in Psychology in 2016. During her undergraduate studies, Yetinayet worked as caregiver for geriatric clients and further expanded her knowledge in patient care. As a fully accredited and licensed registered nurse with over four years of experience, Yetinayet brings both inpatient and outpatient medical knowledge.


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Celine Chang is a California State Board Licensed Acupuncturist, Master of Acupuncture and Oriental Medicine since 2006. She embraces traditional acupuncture with her own innovation and objective diagnosis method. Celine practices the technique of scalp acupuncture, which restores the strength of a person’s body, muscle, organs, and tissues efficiently and usually delivers immediate positive effects.


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