Physicians


R. Michael Hullander, MD

R. Michael Hullander, MD, is board-certified in anesthesiology and the subspecialty of pain management. His passion for helping patients break free of their pain not only inspires him in his clinical work, but also in his scientific research pursuits. He has shared his findings with his peers in numerous publications.

Dr. Hullander began his medical career as an undergraduate student at Duke University in Durham, North Carolina. He earned his medical degree at the Uniformed Services University of the Health Sciences F. Edward Hébert School of Medicine in Bethesda, Maryland. Between medical school and his residency, Dr. Hullander served as U.S. Navy diving medical officer. Upon completion of his service, he performed an anesthesiology and pain medicine residency at the Naval Medical Center in San Diego, California. He also served as director of the Pain Medicine Center at the Naval Medical Center.

Dr. Hullander enjoys being active with numerous medical and professional organizations, including the International Intervention Society, the American Society of Anesthesiologists, the American Society of Regional Anesthesia and Pain Medicine, the American Society of Interventional Pain Physicians, the Central Coast Medical Association, the California Society of Anesthesiologists, the California Medical Association, the American Medical Association and the North American Neuromodulation Society.

Ralph D. Mozingo, DO

Ralph D. Mozingo, DO, is board-certified in anesthesiology, specializing in interventional pain medicine.

He began this journey as a medical student as an undergraduate at UCLA. He earned an osteopathic medicine doctorate at Nova Southeastern University Dr. Kiran C. Patel College of Osteopathic Medicine in Fort Lauderdale, Florida. After graduation, Dr. Mozingo completed an internship at the Los Angeles County+USC Medical Center, followed by a three-year stint as an emergency room physician and air evacuation officer for the U.S. Army in Germany. He completed his postdoctoral clinical training with an anesthesiology and pain medicine residency at Walter Reed Army Medical Center in Washington, D.C. and the Naval Medical Center in San Diego, California.

Dr. Mozingo is a diplomate of the Academy of Integrative Pain Management and an active member of the International Intervention Society, the American Society of Anesthesiologists, the American Society of Regional Anesthesia and Pain Medicine, the American Society of Interventional Pain Physicians, the Central Coast Medical Association, the California Society of Anesthesiologists, the California Medical Association, the American Medical Association and the North American Neuromodulation Society.


David C. Pires, DO

David C. Pires, DO, is an osteopathic pain management specialist. He’s board-certified in the subspecialty of pain management by the American Osteopathic Board of Anesthesiology.

Dr. Pires’ path to pain management started at 18. The California native was a certified personal trainer motivated to help top athletes regain function and strength after surgery or accidents. After working at the renowned Michael Johnson’s personal training studio and physical therapy practice, he set his sights on becoming a physician.

After his undergraduate studies at the University of California, Santa Cruz, Dr. Pires earned his osteopathic medicine doctorate from Western University of the Health Sciences College of Osteopathic Medicine of the Pacific in Pomona, California. He went on to complete an internship rotation at San Bernardino County Medical Center. He continued his postdoctoral clinical training with an anesthesia residency at The Riverside University Health System - Medical Center in Moreno Valley, California. Dr. Pires rounded out his postdoctoral clinical training with a pain medicine anesthesiology fellowship at Cedars-Sinai Medical Center in Los Angeles.

Today, he grooms the next generation of physicians at Cedars-Sinai by serving as an educator for residents and fellows. He is active in numerous professional associations, including the International Intervention Society, the American Society of Anesthesiologists, the American Society of Regional Anesthesia and Pain Medicine, the American Society of Interventional Pain Physicians, the Central Coast Medical Association, the California Society of Anesthesiologists, the California Medical Association, the American Medical Association and the North American Neuromodulation Society.  


Daniel Roshan, MD

Daniel Roshan, MD, is an interventional pain management specialist with a passion for wellness and helping his patients regain control of their lives by relieving their pain and restoring mobility.

This passion can be traced back to his early years, when Dr. Roshan played basketball and football, participated in Olympic weightlifting, and practiced martial arts, including Brazilian Jiu-Jitsu. This appreciation for an active lifestyle led him to become a personal trainer and strength coach, and helped him connect the dots between physical, mental, and emotional health, and the importance of properly managing pain and injuries. This passion not only led him to his medical profession as a pain management specialist, but also as a scientific researcher exploring the future of pain management treatments. His research includes exploring ways to prevent the progression of degenerative disc disease and back pain.

Dr. Roshan did his Pain Fellowship at Cedars Sinai. He has earned his undergraduate degree at the University of California, Irvine, and his medical degree at the Case Western Reserve University School of Medicine in Cleveland, Ohio, where he graduated in the top fourth of his class. He also completed his postdoctoral clinical training with an anesthesiology residency at University of Illinois College of Medicine in Chicago, Illinois, where he scored in the 94th percentile of all nationwide test-takers in his specialty in-training exam. During this residency, he discovered that pain management would be a guiding force in his medical career.

Dr. Roshan is active in many medical and professional associations, including the International Intervention Society, the American Society of Anesthesiologists, the American Society of Regional Anesthesia and Pain Medicine, the American Society of Interventional Pain Physicians, the Central Coast Medical Association, the California Society of Anesthesiologists, the California Medical Association, the American Medical Association and the North American Neuromodulation Society.


Nathan Singer, MD

Dr. Singer is a board certified anesthesiologist and specializes in pain management. He completed medical school at Ross University School of Medicine and a residency at Albert Einstein – Montefiore Medical Center. 


Matthew Ebling, PA

Matt is board certified by the National Commission on Certification of Physician Assistants. He attended Duquesne University, in Pittsburgh, Pennsylvania. He graduated in 2009 with a Bachelor’s Degree in the Health Science. He then started his graduate education at Duquesne University. He completed multiple clinical rotations in Pennsylvania and an orthopedic rotation in Colorado. He graduated with a Master of Physician Assistant Studies in 2010. He is a current member of the American Academy of Physician Assistants and California Academy of Physician Assistants.


Jaime Duncan, PA

Jamie has worked as a Board Certified Physician Assistant since 1999. She graduated with a Bachelor’s of Science in Exercise Science from the University of Arkansas, during which time she won several NCAA National Championships as a distance runner. She completed her Physician Assistant studies at Nova Southeastern University in Florida, graduating with honors. She grew up in Santa Barbara and is married to a Physician Assistant, in addition to being the mother of three.