Yakima Gastroenterology Associate's provider team includes 7 Physicians, 2 Certified Physician Assistants and 1 Advanced Registered Nurse Practitioner
Dr. Thomas Attaway earned his medical degree from the University of Texas in Galveston, TX and completed his Internal Medicine internship and residency at Barnes Hospital in St. Louis, MO. His Gastroenterology fellowship was completed at Parkland Memorial Hospital in Dallas, TX. He started at YGA in 2001. Dr. Attaway is dual certified in Internal Medicine and Gastroenterology.
Dr. Timothy Brown received his MD from the University of Virginia. His Internal Medicine internship and residency were completed at Georgetown University School of Medicine. He completed his Gastroenterology fellowship at the University of New Mexico. Dr. Brown joined Cornerstone Medical Clinic in 1982 and moved to YGA in 2002. He is board certified in Internal Medicine and Gastroenterology.
Dr. Lance Ferrin earned his medical degree from John Hopkins Medical School in Maryland. He completed his Internal Medicine Internship and Residency at the University of Washington. His fellowship in Gastroenterology was then completed at Georgetown University. He is dual certified in Internal Medicine and Gastroenterology. He joined YGA in 2003.
Dr. Gilbert Ong joined YGA in August 2007. He relocated from Upstate Medical University, NY where he finished his third year of Gastroenterology Fellowship. Dr. Ong received his MD from the University of Santo Tomas. He finished his Internal Medicine Residency at SUNY - Upstate Medical University in NY and was Chief Resident. Dr Ong dual board certified in Internal Medicine and Gastroenterology.
Dr. Gonzalo Pandolfi went to medical school at the Universidad Autonoma de Guadalajara. He completed his Internal Medicine internship and residency at Cook County Hospital in Chicago. He then completed a fellowship in Gastroenterology at Cook County as well. Dr. Pandolfi is dual board certified in Internal Medicine and Gastroenterology. He started at YGA in 2005.
Dr. Amar Ramakrishnan joined YGA in 2002. He obtained his Degree of Medicine and Surgery in 1993 through the Tamil Nadu Dr. M.G.R Medical University in India and received his degree of Doctor of Medicine at the Sri Ramachandra Medical College in India in 1994. He then completed his residency in Internal Medicine and his fellowship Gastroenterology at Graduate Hospital in Philadelphia, PA. He is board certified in Internal Medicine. Dr Ramakirshnan is dual board certified in Internal Medicine and Gastroenterology.
Dr. Robert Williams earned his MD at the University of California, San Diego. He completed his Internal Medicine Internship and Residency at the University of Colorado. He completed his Gastroenterology fellowship at the University of North Carolina at Chapel Hill. Dr. Williams joined Cornerstone Medical Clinic in 1988 and moved to YGA when it began in 2002. He is dual board certified in Internal Medicine and Gastroenterology.
Mid Levels
Tanda Ferguson, ARNP obtained her Master of Science in Nursing from Washington State University. Tanda started with YGA in 2003. She is certified by the American Academy of Nurse Practitioners.
Amy Zeigler, PA-C graduated from Western Michigan University's Physician Assistant program with a Master of Science in Medicine. She is certified by the National Commission of Certification of Physician Assistants. She joined YGA in 2004.
Soly Houy, PA-C
Graduated from Midwestern University in Glendale, AZ with a Master of Science in Physician Assistant. He is certified by the National Commission of Certification of Physician Assistants. He joined YGA in 2009.
.
Dr. Thomas Attaway earned his medical degree from the University of Texas in Galveston, TX and completed his Internal Medicine internship and residency at Barnes Hospital in St. Louis, MO. His Gastroenterology fellowship was completed at Parkland Memorial Hospital in Dallas, TX. He started at YGA in 2001. Dr. Attaway is dual certified in Internal Medicine and Gastroenterology.
Dr. Timothy Brown received his MD from the University of Virginia. His Internal Medicine internship and residency were completed at Georgetown University School of Medicine. He completed his Gastroenterology fellowship at the University of New Mexico. Dr. Brown joined Cornerstone Medical Clinic in 1982 and moved to YGA in 2002. He is board certified in Internal Medicine and Gastroenterology.
Dr. Lance Ferrin earned his medical degree from John Hopkins Medical School in Maryland. He completed his Internal Medicine Internship and Residency at the University of Washington. His fellowship in Gastroenterology was then completed at Georgetown University. He is dual certified in Internal Medicine and Gastroenterology. He joined YGA in 2003. 
Dr. Gilbert Ong joined YGA in August 2007. He relocated from Upstate Medical University, NY where he finished his third year of Gastroenterology Fellowship. Dr. Ong received his MD from the University of Santo Tomas. He finished his Internal Medicine Residency at SUNY - Upstate Medical University in NY and was Chief Resident. Dr Ong dual board certified in Internal Medicine and Gastroenterology.
Dr. Gonzalo Pandolfi went to medical school at the Universidad Autonoma de Guadalajara. He completed his Internal Medicine internship and residency at Cook County Hospital in Chicago. He then completed a fellowship in Gastroenterology at Cook County as well. Dr. Pandolfi is dual board certified in Internal Medicine and Gastroenterology. He started at YGA in 2005.
Dr. Amar Ramakrishnan joined YGA in 2002. He obtained his Degree of Medicine and Surgery in 1993 through the Tamil Nadu Dr. M.G.R Medical University in India and received his degree of Doctor of Medicine at the Sri Ramachandra Medical College in India in 1994. He then completed his residency in Internal Medicine and his fellowship Gastroenterology at Graduate Hospital in Philadelphia, PA. He is board certified in Internal Medicine. Dr Ramakirshnan is dual board certified in Internal Medicine and Gastroenterology.
Dr. Robert Williams earned his MD at the University of California, San Diego. He completed his Internal Medicine Internship and Residency at the University of Colorado. He completed his Gastroenterology fellowship at the University of North Carolina at Chapel Hill. Dr. Williams joined Cornerstone Medical Clinic in 1988 and moved to YGA when it began in 2002. He is dual board certified in Internal Medicine and Gastroenterology.
Tanda Ferguson, ARNP obtained her Master of Science in Nursing from Washington State University. Tanda started with YGA in 2003. She is certified by the American Academy of Nurse Practitioners.
Amy Zeigler, PA-C graduated from Western Michigan University's Physician Assistant program with a Master of Science in Medicine. She is certified by the National Commission of Certification of Physician Assistants. She joined YGA in 2004.
Soly Houy, PA-C
Graduated from Midwestern University in Glendale, AZ with a Master of Science in Physician Assistant. He is certified by the National Commission of Certification of Physician Assistants. He joined YGA in 2009.
.