Our Clinicians
Timothy Crall, M.D.,
Mammoth Hospital's Sierra Park Orthopedic & Sports Medicine Clinic is pleased to offer the services of Dr. Timothy Crall, our newest fellowship trained orthopedic surgeon. Dr. Crall studied medicine at Washington University School of Medicine in St. Louis, Missouri, and completed his residency training at Harvard University in Boston, Massachusetts. He then completed subspecialty fellowship training in sports medicine and arthroscopy in Taos, New Mexico. There he focused on knee and shoulder reconstruction.
Dr. Crall and his wife, Heather, are both originally from the Brunswick, Maine area. When the Cralls first visited Mammoth, they found a lot of similarities to Maine in the small town atmosphere with plenty of outdoor recreation. They liked what they saw so much in a 20-hour visit that they moved here shortly thereafter, bringing along their two children, Ellie and Bram. They welcomed their third child, Leah, born at Mammoth Hospital in November 2011. Aside from keeping up with his kids, Dr. Crall enjoys skiing, biking, hiking, kayaking, brewing his own beer, and golfing.
Dr. Crall’s special interests include traumatic and sports related injuries, as well as arthroscopic and open reconstruction of shoulder and knee derangements. His research on shoulder instability recently received national recognition, winning the 2012 J. Whit Ewing Award from the Arthroscopy Association of North America. Dr. Crall serves a team physician for the United States Ski Team, Free Ski Division.
Mike Karch, M.D.,
Dr Karch has served as a Team Physician for the United States Ski and Snowboard Team since 2002 and focuses on Nordic World Cup Events. He has served as personal physician to numerous Olympians and world elite athletes and serves as Team Physician for both the Mammoth Track Club as well as the 2010 Vancouver Olympics medal winning USA Nordic Combined Team.
In 2006, Mike founded the Mammoth Winter Biathlon which combines nordic ski racing and rifle marksmanship. His race has quickly become the largest Winter Biathlon in North America.
Dr Karch uniquely experienced the tragic events of September 11th by treating victims of both the Pentagon and Ground Zero sites. He was one of the first physicians on site at Ground Zero and performed search and recovery and established two on site MASH units within the disaster area.
His written document on mass casualty at Ground Zero (www.equipped.com/groundzero.htm) was evaluated by the Joint Chiefs of Staff and served as testimony for the re-organization of emergency medical response for the Department of Homeland Security .
Mike is an avid winter biathlete, nordic ski racer, and triathlete. He has completed over 50 marathons, 5 ironman triathlons, and is a 2 time finisher of the Badwater Ultramarathon 135 mile foot race across Death Valley.
Mike's wife, Kim Escudero, MD is a Board Certified Pediatrician who practices in Mammoth. Together, they have 3 children: Mia, Dane, and Olivia, all of whom were born at Mammoth Hospital.
Mark Robinson, M.D.,
Dr. Robinson was raised in Pittsburgh, PA, by parents who were both physicians. He graduated
summa cum laude in philosophy from Princeton University in 1975, and earned his medical degree from Thomas Jefferson
University in Philadelphia, PA, followed by two years of general surgery training at UC Davis. He completed his residency
training in orthopedic surgery in San Francisco before accepting a medical staff appointment at Ventura County Medical Center.
Through his 20-year tenure there, Dr. Robinson served as Director of Orthopedics, Chief of Surgery, and Medical Staff
President. His practice has focused on total joint replacement of the hip and knee and the treatment of complex fractures
and orthopedic trauma.
Richard. A. Brown, M.D.
Dr. Brown specializes in reconstructive, trauma and microsurgery of the hand. He was one of the first physicians to use Xiaflex as a non-surgical option for patients with Dupytren’s Disease and presented his findings at the American Academy of Hand Surgeons in the fall of 2010. Dr. Brown is a member of the Board of Directors for the California Orthopaedic Association as well as the American Academy of Orthopaedic Surgeons Committee on Professionalism. He is a Qualified Medical Examiner and is a member of the American Society for Surgery of the Hand Committee on Ethics.
David J.Dalstrom, M.D.
Dr. Dalstrom specializes in fracture care, post traumatic reconstruction and foot and ankle surgery. Dr. Dalstrom trained at the prestigious Harborview Foot and Ankle Fellowship in Seattle, Washington. He is also fellowship trained in Trauma and is on the Scripps Memorial Hospital’s Trauma team. He treats complex problems related to nerves, muscles and biomechanics, as well as common ailments such as flat foot and fractures. Dr. Dalstrom’s personal interests include Jiu Jitsu, mixed martial arts, and triathlon.
David R. Hackley, M.D.
An athlete in his own right, Dr. Hackley specializes in sports injuries, arthroscopy, shoulder, knee, and trauma. He is a Diplomate with the American Board of Orthopaedic Surgery and also holds a Certificate in Sports Medicine from the American Board of Orthopaedic Surgery. Dr. Hackley is also a member of the Trauma Team for Scripps Memorial Hospital. He is an avid bicyclist, runner, and snowboarder.
Richard M. Thunder, M.D.
Dr. Richard Thunder specializes in spinal disorders, general orthopedics with an emphasis in sports injuries, arthroscopic surgery, joint replacement and trauma. Dr. Thunder trained in the internationally recognized Stanford Orthopedic Spine Fellowship Program. His focus is on quality of life for patients through diagnosis, physical therapy and alternative treatments. Dr. Thunder has his pilot’s license and enjoys flying, mountain biking, and snowboarding.
