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About Us

Mark R. Carter, MD

Mark R. Carter, MD received his medical degree and pathology training from Loma Linda University followed by a fellowship in Surgical Pathology at Harvard Medical School/Brigham and Women’s Hospital. Dr. Carter joined PSMG in 2006 after serving four years in the U.S. Air Force at Wilford Hall Medical Center in San Antonio where he was the Director of Surgical Pathology as well as the Medical Director of Transfusion Services.  Dr. Carter is board certified in Anatomic and Clinical Pathology. 

Priscilla Chang, MD PhD

Priscilla Chang, MD PhD joined PSMG in 2009 following residency and fellowship training at Brigham and Women’s Hospital.  She attended Harvard University for her undergraduate education.  Her medical and doctoral degrees are from the University of Texas Southwestern Medical School in Dallas.  Dr. Chang is board certified in Anatomic and Clinical Pathology and Hematopathology.

Heidi Jess, MD

Heidi Jess, MD, who joined PSMG in 2012, received her medical doctorate from the University of North Dakota.  She completed her anatomic and clinical pathology residency and cytopathology fellowship training at the University of California Davis Medical Center.  Dr. Jess is board certified in Anatomic and Clinical Pathology and Cytopathology.

Rebecca L. Johnson, MD

Rebecca L. Johnson, M.D. earned her undergraduate degree at the College of Saint Benedict in St. Joseph, Minnesota, and her medical doctorate at the University of Minnesota.  She completed pathology residency and surgical pathology fellowship training at University of California San Diego, followed by Hematopathology fellowship training at Scripps Green Hospital.  Dr. Johnson joined PSMG in 2016 and is Anatomic and Clinical Pathology board certified.

Nelson K. Kaneishi, MD

Nelson K. Kaneishi, MD attended the University of Washington in Seattle for his undergraduate and medical education.  He completed residency training in Anatomic and Clinical Pathology at the University of California Davis Medical Center, followed by a dermatopathology fellowship at the University of Texas, Southwestern Medical School in Dallas under Dr. Clay Cockerell. He joined PSMG in 1996. Dr. Kaneishi is board certified in Anatomic and Clinical Pathology as well as Dermatopathology.

Anthony Nasr, PhD, MD

Anthony Nasr, PhD, MD is a graduate of the University of California, Berkeley. He completed his doctoral degree in Anatomy at Albert Einstein College of Medicine in New York and Medical training at the University of Miami School of Medicine. He completed his residency in Anatomic and Clinical Pathology at the University of California San Francisco, where he served as Associate Clinical Professor of Pathology before coming to PSMG in 1993.

Geoffrey Sasaki, MD

Geoffrey Sasaki, MD joined PSMG in 2013 after serving 14 years active duty in the U.S. Air Force.  He earned his medical degree from the Uniformed Services University of the Health Sciences.  After completing an internal medicine internship, he served as a flight surgeon in Albuquerque, NM.  He then went on to complete his anatomic and clinical pathology residency at Wilford Hall Medical Center in San Antonio followed by a dermatopathology fellowship at the prestigious Armed Forces Institute of Pathology (AFIP).  As a staff pathologist , he served as the Chief of Anatomic Pathology and Chief of Dermatopathology at the 2nd largest Air Force medical center.  Dr. Sasaki is board certified in Anatomic and Clinical Pathology and Dermatopathology.

Lester K. Wong, MD

Lester K. Wong, MD has been with PSMG since 1986, following a fellowship in Surgical Pathology at the Hospital of the University of Pennsylvania. His medical degree is from Northwestern University Medical School, and his residency training in Anatomic and Clinical Pathology was at the University of California Medical School, Davis, Medical Center. Dr. Wong is board certified in Anatomic and Clinical Pathology.

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