Robert W. Sanders, M.D., FACEp, uhm/abem

Board Certified Emergency Medicine Physician, Board Certified Undersea and Hyperbaric Medicine Physician

Dr. Sanders received his medical degree from Rosalind Franklin University of Medicine and Science in 2005. He became board certified in Emergency Medicine after completing the University of Pittsburgh Residency in Emergency Medicine in 2008.  He has practiced hyperbaric medicine since 2008 and is board certified in Undersea and Hyperbaric Medicine through the American Board of Emergency Medicine (ABEM).

Prior to coming to American Hyperbaric Center, Dr. Sanders served as Assistant Clinical Professor in the Department of Surgery, Divisions of Emergency Medicine and Undersea and Hyperbaric Medicine and, Medical Officer at the Hyperbaric Treatment Center at the John A. Burns School of Medicine , University of Hawaii at Manoa, Honolulu, HI,  Attending Emergency Physician for Hawaii Permanente Medical Group in Honolulu, HI, Islands Emergency Medical Services in Honolulu, HI, and Molokai General Hospital in Kaunakakai, HI.  During his residency, he served as Assistant Medical Director for Pittsburgh River Rescue, in Pittsburgh, PA. He also served as Flight Physician for Stat MedEvac, Pittsburgh, PA, providing field based helicopter flight physician support for both scene runs and inter-facility critical care transfers.

Dr. Sanders medical career began in 1989 as an EMT that evolved into his HBOT field in 1993 where he worked as a technician and eventually as a supervisor at the University of Southern California-Catalina Island Hyperbaric Chamber.  During 4 seasons in the later 1990s he was an Antarctic Research Diver/Field Safety Officer at the Wadsworth Center for Laboratories and Research at McMurdo Station in Antarctica.  As a Dive Medic, he was responsible for the individual health, and team safety as teams collected macro organisms from sediment in 100 foot depths of 28˚F water below 12 ft of ice.

He continues to be a recreational and scientific diver.  He currently provides technical advice for emergency medical services as well as sport, scientific and technical diving.  He has professional experience conducting shark diving & tagging operations.  He also spent 8 years diving with the LA County Sheriff’s office where he participated in the search and recovery of evidence.  He is a recognized educator in emergency medicine, hyperbaric medicine and diving medicine.  He has numerous medical and scientific publications.


Norman D. Means, MD, FCAP

Norman D. Means, MD, received his A.B. in the Biological Sciences from the University of Chicago and is a 1993 graduate of the Indiana University School of Medicine.  Dr. Means completed an internship in General Surgery at the University of Tennessee that included formal training in trauma, burn and wound care.

He subsequently completed a residency in Clinical and Anatomic Pathology at the University of Tennessee.  Dr. Means went on to pursue a Fellowship in Transfusion Medicine and Blood Banking at the University of North Carolina in Chapel Hill.  He then completed the Duke University Family Medicine Residency in Fayetteville, North Carolina. 

Dr. Means arrived in Alaska to serve as doctor to a Bush community in 2003.   Since 2004, he has been in private practice in the Anchorage area.  Dr. Means also served as the Medical and Laboratory Director for the Blood Bank of Alaska. He holds 3 board certifications in Family Medicine, Anatomic Pathology and Clinical Pathology.  He is also Board-eligible in Transfusion Medicine and Blood Banking.

Dr. Means is a published medical researcher presenting his research at several national medical meetings. In 2008, Dr. Means was elected a Fellow of the American College of Pathology.


Donald G. Hudson, D.O., FACEP/ACOEM

Description: Don Photo 5-11.jpg

Dr. Hudson adds American Hyperbaric Center to a distinguished career including Medical Director for Crossroads Medical Center, Associate Professor in ER/FP Medicine at Yakima Osteopathic Medical School, Medical Director for Whittier, Donlin Creek, Unalaska and Crossroads EMS services and is on the Alaska Council on Emergency Medical Services (ACEMS).

Well-known and respected in Alaska, Dr. Hudson continues to experience a diverse and illustrious career in emergency medicine.  Dr. Hudson's career in civilian and military emergency and aerospace medicine began in the mid 70's, having received his license as a Doctor of Osteopathy, (D.O.) in 1975. Hudson has been an Emergency Room Physician with Alaska Regional Hospital in Anchorage, Alaska since 1976.  He also has served as the Medical Director for the Columbia Alaska Regional Hospital Life Flight for over two decades.  Hudson is the recipient of the 2002 George H. Longenbaugh, M.D. Award from ACEMS for service to the Alaska Emergency Medical Services System.  His hobbies include flying, snowmobiling, photography, movies and weight lifting.



Dr. Nancy Greenwell is certified by the American Board of Family Medicine, is board certified in Undersea and Hyperbaric Medicine and has a Certificate of Added Qualifications in Sports Medicine. She has been a staff physician with Kula Hospital on Maui since 2006, where she also served briefly as Medical Director of the Emergency Department. A family physician with Kaiser Permanente’s Kihei and Wailuku Clinics from 1999 to 2006, Dr. Greenwell served as Medical Director of the Urgent Care Clinic in Wailuku from 2002 to 2006 and as Medical Director of the Kihei Clinic from 2001 to 2002. Prior to moving to Maui, Dr. Greenwell was in private practice on Kauai for two years. After graduating magna cum laude from the University of California at San Diego with a Bachelor of Arts degree in psychology, she earned her M.D. from New York Medical Collage, where she was elected to Alpha Omega Alpha in her junior year. While at NYMC, Dr. Greenwell received the New York Medical College Trustee Scholar Award, and upon graduation was awarded the Gate Pharmaceutical’s Outstanding Medical Student Citation; one of fifty-five awarded nation-wide for achievement in the field of Family Medicine. She did her internship and residency at Sutter Hospital in Santa Rosa, CA; a University of California at San Francisco affiliated program, where she was elected Chief Resident in her 3rd year. Subsequently, Dr. Greenwell completed the UCSF Northern California Faculty Development Fellowship, served as an Assistant Clinical Professor at UCSF and practiced a full range of family medicine as part of the faculty at Sutter Hospital. She has been a member of the American Academy of Family Physicians, American College of Sports Medicine and the Hawaii Academy of Family Physicians since 1996. Married with two children, Dr. Greenwell enjoys diving, surfing and holds a second degree black belt in Tang Soo Do.



One certified technician always accompanies patients in the hyperbaric chamber while two more are outside engaged in chamber operation.  The treatments are controlled under meticulously monitored conditions following protocols set by our Medical Director.


StaffOur Administrative Staff

Our administrative staff has 20 years combined customer service and patient relations experience.  Their goal is to help provide a stress free environment to promote a healing atmosphere.