The Medical Opinion Marketplace

Marco Zahedi, MD, MPH, is a General Practice Physician serving patients in Southern California. He earned his medical degree from Chicago Medical School at Rosalind Franklin University of Medicine and Science and brings a public health perspective to everyday clinical decision-making, emphasizing prevention, risk reduction, and long-term wellness. Dr. Zahedi’s practice spans general medical care as well as office-based services that support patients’ aesthetic and restorative goals. His clinical offerings include injectable treatments, skin care services, hair restoration, and platelet-rich plasma (PRP)–related therapies. In addition, he is listed as providing services related to addiction and medical detox, with options for both in-person and online support. Known for a patient-centered approach, Dr. Zahedi focuses on listening closely, aligning care plans with individual priorities, and helping patients navigate both acute concerns and ongoing health maintenance. His training and broad service scope allow him to integrate medical care with evidence-informed wellness and cosmetic treatment options when appropriate.

Scott E. Hardy, MD, MPH, is a physician specializing in medical toxicology with a background in emergency medicine, as well as occupational and environmental medicine. He serves as an Associate Clinical Professor at the Susan & Henry Samueli College of Health Sciences at the University of California, Irvine (UCI), contributing to clinical education and training in occupational and environmental medicine. Dr. Hardy earned his medical degree from Saint Louis University School of Medicine and later completed a Master of Public Health at the Medical College of Wisconsin. He is board certified in Occupational Medicine by the American Board of Preventive Medicine and is also board certified in Medical Toxicology. His clinical and professional interests include toxic exposure, occupational illness, work fitness, impairment evaluation, and orthopedic injury. In addition to academic work, Dr. Hardy has extensive experience providing occupational medicine and toxicology services in private practice and has held leadership responsibilities as a medical director in employee health. He is a Fellow of the American College of Occupational and Environmental Medicine and maintains active membership in professional societies focused on occupational medicine and medical toxicology.

Michael Gillman, M.D., is a board-certified orthopedic surgeon specializing in orthopaedic surgery. He is on staff at CHOC at Mission Hospital, where he provides comprehensive musculoskeletal care with an emphasis on safe, evidence-based treatment and clear communication with patients and families. Dr. Gillman earned his medical degree from Case Western Reserve University in Cleveland, Ohio. He completed internship training at Baylor College of Medicine in Houston, Texas, and at Tufts New England Medical Center in Boston, Massachusetts, followed by an orthopedic surgery residency at Tufts New England Medical Center. In addition to his hospital staff role, Dr. Gillman is associated with regional surgical services in Orange, California, supporting coordinated care across outpatient and surgical settings. His professional background also includes prior medical staff membership with the Hoag Orthopedic Institute. Dr. Gillman is committed to helping patients return to activity and improve function through individualized care plans that may include nonoperative therapies and, when appropriate, surgical intervention.

Mahmoud Q. Moammar, MD, is a pulmonary disease physician and board-certified interventional pulmonologist with Providence St. Joseph Hospital Orange, where he also serves as Program Director for Pulmonary Services. He is board certified by the American Board of Internal Medicine in Internal Medicine and Pulmonary Disease, and is listed as an active diplomate in Interventional Pulmonology by the American Association for Bronchology and Interventional Pulmonology. Dr. Moammar earned his medical degree from Jordan University of Science and Technology and completed fellowship training at Seton Hall University, where he served as Chief Pulmonary Fellow. His clinical focus includes advanced bronchoscopic procedures and comprehensive care for patients with complex pulmonary conditions, including lung cancer and chronic obstructive pulmonary disease (COPD). He has particular expertise in interventional approaches such as endobronchial Zephyr valve placement. In addition to his hospital leadership responsibilities, Dr. Moammar is part of the Lung and Thoracic Cancer team, collaborating across specialties to support coordinated evaluation and treatment. He has been recognized with Providence’s Golden State Patient Experience Award for excellence in patient experience.

Dr. Sarah S. Field is an allergy and immunology physician who is board certified in Allergy & Immunology and Internal Medicine. She is on staff at CHOC Hospital Orange and is affiliated with Providence St. Joseph Hospital – Orange. Dr. Field earned her medical degree from St. Louis University School of Medicine and completed an internal medicine residency at the University of Kansas Medical Center, where she also completed fellowship training in Allergy & Immunology. In addition to her clinical practice, Dr. Field serves as Director of CHOC Clinical Research for Allergy & Immunology and Co-Director of the CHOC Eosinophilic Esophagitis (EoE) Clinic. Her clinical focus includes allergy, asthma, and immunology, with special interests in eosinophilic esophagitis, asthma, urticaria, food allergy, and allergic rhinitis. Dr. Field is involved in clinical research, including enrollment in trials related to asthma, chronic urticaria, eczema, and allergic rhinitis. She is a Fellow of the American Academy of Allergy, Asthma & Immunology and participates in professional organizations that support ongoing education and collaboration in allergy and immunology care.

Dr. Bijan Zardouz is a physician specializing in neurological surgery. He earned his medical degree from Shiraz University of Medical Sciences and completed residency training at LAC+USC Medical Center. Dr. Zardouz is a Diplomate of the American Board of Clinical Neurophysiology, reflecting advanced expertise in the evaluation of neurologic function. In clinical practice, he provides diagnostic neurophysiology services that commonly include electroencephalography (EEG) and electromyography with nerve conduction studies (EMG/NCS), supporting the assessment of conditions affecting the brain, spinal cord, nerves, and muscles. His work is grounded in careful interpretation of neurologic testing to help guide patient care and treatment decisions. Dr. Zardouz maintains hospital affiliations with South Coast Global Medical Center, Saint Bernardine Medical Center, and Community Hospital of San Bernardino. He is also a member of the American Neurology Association. In addition to his clinical practice, he has been publicly identified as providing medical opinions in expert witness contexts. Dr. Zardouz speaks Spanish and Arabic.

Jenniffer A. Manavi, PhD, is a California-licensed psychologist and Marriage & Family Therapist with training in clinical and forensic psychology. She provides psychological assessment, testing, and psychotherapy services for children and adults, integrating evidence-based approaches tailored to each patient’s needs. Dr. Manavi’s clinical interests include comprehensive diagnostic evaluation and treatment planning, with experience supporting individuals and families across a range of emotional, behavioral, and relational concerns. In addition to clinical practice, Dr. Manavi has experience in medicolegal and disability-related psychological evaluations, incorporating clinical interviews, psychological testing, and diagnostic impressions to address complex functional and psychological questions. She is also qualified to conduct workers’ compensation-related psychological evaluations as a Qualified Medical Evaluator. Dr. Manavi earned a PsyD in Clinical Forensic Psychology from Alliant International University and a Bachelor of Science in Human Development from Hope International University. Her professional background includes teaching in graduate psychology programs and a prior public service role, bringing a grounded, structured perspective to her clinical and evaluative work. She has pursued specialized training in child custody evaluations, EMDR, and hypnotherapy, and continues ongoing professional development in sexual therapy.

Valerie Ann Chavez-Arom, MD, is a board-certified Physical Medicine and Rehabilitation (PM&R) physician with specialized training in spinal cord injury medicine. She serves as an Assistant Professor in the Department of Physical Medicine & Rehabilitation at the UC Irvine School of Medicine and provides comprehensive rehabilitation care focused on restoring function, mobility, and quality of life. Dr. Chavez-Arom earned her medical degree from Rosalind Franklin University of Medicine and Science and also completed an MS in Biomedical Sciences. She received her undergraduate training at the University of California, Irvine, where she earned a BS in Biological Sciences. Her postgraduate training includes a preliminary residency in Internal Medicine followed by a PM&R residency at UC Irvine, and she completed fellowship training in spinal cord injury medicine through UC Irvine and the Long Beach VA. Her clinical interests include spinal cord injury rehabilitation and neurorehabilitation, with additional focus on stroke and spasticity management. Dr. Chavez-Arom’s research interests include spinal cord injury recovery, neurorehabilitation, and balance, and her scholarly work includes peer-reviewed publication on vitamin D deficiency in acute rehabilitation patients.

Michael Y. Oh, MD, is a neurosurgeon specializing in spine disorders and stereotactic and functional neurosurgery for movement disorders, including Parkinson’s disease and other neurodegenerative conditions. He is a Professor in the Department of Neurological Surgery at the UC Irvine School of Medicine, where he also serves as Vice Chair of Education, Director of the Comprehensive Spine Center, and Medical Director of the Ambulatory Neurological Surgery Clinics. Dr. Oh’s clinical interests include endoscopic spine surgery, spinal cord stimulation, deep brain stimulation, and the management of complex spinal conditions such as spine tumors and spinal deformities, including scoliosis and flatback syndrome. He is board certified in neurological surgery by the American Board of Neurological Surgery and is a Fellow of the American Association of Neurological Surgeons. His training includes medical education at the Keck School of Medicine of USC and New York Medical College, a surgery internship at Allegheny General Hospital, and neurosurgery residency at Allegheny General Hospital, where he served as chief resident. He completed a research fellowship in stereotactic and functional neurosurgery at the University of Toronto and Toronto Western Hospital–University Health Network. Dr. Oh’s research includes advances in robotics for neurosurgical procedures, and he holds a patent for a minimally invasive device designed to remove blood clots in the brain.

Hamid R. Djalilian, MD, is an otology and neurotology physician specializing in disorders of the ear, hearing, and balance. He is a Professor in the Department of Otolaryngology at the UC Irvine School of Medicine and holds joint academic appointments with Neurosurgery and Biomedical Engineering. Dr. Djalilian earned his medical degree from the University of Minnesota and completed advanced fellowship training in otology/neurotology and skull base surgery, including training at the Minnesota Ear, Head & Neck Clinic and the University of Minnesota. He is board-certified. Clinically, Dr. Djalilian cares for patients with hearing loss, dizziness and balance disorders, tinnitus, and facial nerve disorders, and he performs complex ear and skull base procedures. His research interests include dizziness and imbalance, hearing loss, tinnitus, and medical devices, with a focus on translating innovations into clinical care. He has also served as a principal investigator on clinical research related to Ménière’s disease treatments. Previously, Dr. Djalilian held faculty appointments at the University of Illinois, Cedars-Sinai Medical Center, and UCLA. He is the inaugural holder of the Muzzy Family Endowed Chair in Hearing and Balance at UC Irvine.