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Board members

The LHP Board of Managers develops and oversees the strategic direction of the network. The board oversees the work of the three board subcommittees and has final approval authority for all recommended actions put forth by the committees, including but not limited to, clinical integration program performance measures, contracts entered into on behalf of the network, data integration activities and population health services.

Chair: DeOna Bridgeman, M.D., Davies Clinic
Vice Chair: Gregory Saunders, M.D., LMG – Camas 

Managers: 
  • Peter T. Beatty, M.D., Tualatin Imaging, PC
  • Jennifer Byrne, D.O., Columbia View Family Health
  • Albert Chaffin, M.D., Pediatric Associates of the NW
  • Sajal Dutta, M.D., The Oregon Clinic
  • Joseph Frankhouse, M.D., LMG – Gastrointestinal Surgery
  • Greg Hallas, M.D., The Vancouver Clinic 
  • Lewis Low, M.D., Chief Medical Officer & Senior Vice President, Legacy Health 
  • Mal McAninch, M.D., AIM Health
  • Opher Nadler, M.D., Northwest Acute Care Specialists 
  • Gretchen Nichols, R.N., Legacy Mount Hood Medical Center
  • Natasha Pereira, M.D., The Children's Clinic
  • Dan Tseng, M.D., Northwest Minimally Invasive Surgery
  • Damon Warhus, M.D., Women's Healthcare Associates
  • Beau Weill, M.D., Metropolitan Pediatrics


Peter Beatty

Peter T. Beatty, M.D.

Tualatin Imaging
Legacy Health Partners Board of Managers

Dr. Beatty is a board-certified radiologist with an interest in body, musculoskeletal and vascular imaging. Dr. Beatty received his Bachelor of Arts in American history from Harvard University and his medical degree from Duke University. He completed a residency in radiology at Stanford University where he was the Chief Resident. Dr. Beatty completed fellowship training in vascular and interventional radiology at Stanford University and subsequently in musculoskeletal radiology at the University of California at San Francisco. Dr. Beatty has held a variety of leadership positions both locally and nationally. He has been a fellow of the Society of Interventional Radiology since 2001.


DeOna Bridgeman MD

DeOna Bridgeman, M.D.

Davies Clinic
Legacy Health Partners Board of Managers Chair

Dr. Bridgeman is an independent board-certified family physician at the Davies Clinic in Canby, Oregon. As medical director, she has led the Davies Clinic through the following transitions: the move from paper charts to an electronic medical record, the NCQA Patient-Centered Medical Home (PCMH) Recognition process, multiple quality improvement initiatives and a large-scale building remodel. Currently, she is leading the transition from one electronic medical record to the next (Epic). Dr. Bridgeman is a native of Central Oregon. She received her Bachelor of Science at Linfield College and attended medical school at Oregon Health & Science University. She completed her three-year family medicine residency and served as chief resident at The Washington Hospital in Washington, Pennsylvania. She joined the Davies Clinic in 2000. 

Jennifer Byrne, D.O. (Bio coming soon)

Columbia View Family Health
Legacy Health Partners Board of Managers

Albert Chaffin, M.D. (Bio coming soon)

Pediatric Associates of the NW
Clinical Collaboration and Performance Improvement Committee Chair

Sajal Dutta, M.D. (Photo soon)

The Oregon Clinic
Legacy Health Partners Board of Managers

Dr. Dutta completed his medical degree at the University of Southern California School of Medicine in 1996. He completed his internship and residency at Vanderbilt University Medical Center and has been practicing in Oregon since 2002. He is a Diplomate of the American Board of Urology and is a Fellow of the American College of Surgeons. Dr. Dutta has extensive experience in minimally invasive treatments for benign prostatic hyperplasia (BPH), stone disease, and use of the DaVinci surgical system for genitourinary cancers. He is currently head of robotics at Emanuel Hospital. In addition, he has conducted research into how specific urologic treatments affect quality of life for patients.

Joseph FrankhouseJoseph Frankhouse, M.D.

Legacy Good Samaritan Colorectal Cancer Center
Legacy Health Partners Board of Managers
Quality and Membership Committee Chair

Dr. Frankhouse is a general surgeon, specializing primarily in colon and rectal surgery. He grew up in Harrisburg, Pennsylvania, and graduated from Dartmouth with an engineering degree in 1985. He then went to Emory University for medical school and completed a surgical residency at LAC + USC Medical Center. He has previously been in two private practices, Surgical Associates, PC and the Colon and Rectal Clinic, PC, prior to joining Legacy Health in 2011. He practices primarily at Good Samaritan Hospital now. Dr. Frankhouse established a GI oncology conference, and has been actively involved in both specialty surgical care and in hospital leadership positions. He has served as section Chair for General Surgery, Quality Council Chair and is currently Chair for Department of Surgery.

Greg Hallas, M.D. (Photo soon)

The Vancouver Clinic
Legacy Health Partners Board of Managers
Quality and Membership Committee Vice Chair

Dr. Hallas is a board-certified internal medicine physician with the Vancouver Clinic in Vancouver. He trained at Creighton University in Nebraska and has been practicing outpatient internal medicine in Washington since 1989. He served as the first medical staff president at Legacy Salmon Creek hospital. He is a fellow in the American College of Physicians and has recently joined the faculty of the Elson S. Floyd College of Medicine at Washington State University. 

Lewis LowLewis Low, M.D.

Senior Vice President, Chief Medical Officer, Legacy Health
Legacy Health Partners Board of Managers

A specialist in intensive care and critical care medicine, Dr. Low joined Legacy Health in 2003 as clinical vice president of medical specialties. He became chief medical officer in 2012. Before arriving in Portland, Dr. Low was the director of critical care medicine at St. Francis Medical Center and Kuakini Medical Center, both in Honolulu, Hawaii. He was also assistant professor of medicine and surgery at the University of Hawaii. Prior to these roles, he served in the United States Army as chief of critical care medicine and medical director of respiratory care at Madigan Army Medical Center at Fort Lewis, Washington. A graduate of the University of California at Berkeley, Dr. Low attended St. Louis University School of Medicine, completed an internal medicine residency program at Letterman Army Medical Center in San Francisco and received postgraduate training in critical care medicine at Walter Reed Army Medical Center in Washington, D.C. He is board-certified in critical care medicine and internal medicine. In 2006, he received the Legacy Health John G. King Award for the Best Quality Improvement Project, the “Critical Care Best Practice Bundle.”

Mal McAninch

Mal McAninch, M.D.

AIM Health
Legacy Health Partners Board of Managers
Finance and Contracting Committee Chair

Dr. McAninch is board-certified in internal medicine and practices outpatient medicine at AIM Health. Prior to joining AIM Health in 2019, Dr. McAninch was with GreenField Health System. Previously, Dr. McAninch was one of the medical directors of Legacy Primary Care Clinics with Legacy Medical Group and had an internal medicine practice based at Legacy Emanuel Medical Center. Prior to that, he practiced with The Metropolitan Clinic/HealthFirst Medical Group.Dr. McAninch is a native of Camas, Washington. He graduated from University of Puget Sound in Tacoma and completed his medical education in Philadelphia at Sidney Kimmel Medical College at Thomas Jefferson University. He returned to the Portland area for his training in internal medicine at Legacy Good Samaritan Medical Center, where he served as intern, internal medicine resident and then as chief medical resident.

Opher Nadler

Opher Nadler, M.D.

Northwest Acute Care Specialists
Legacy Health Partners Board of Managers

Dr. Nadler is board-certified in pediatrics and pediatric emergency medicine. A specialist in pediatric emergency medicine, Dr. Nadler joined Northwest Acute Care Specialists and Legacy Health in 2009. Dr. Nadler serves as the medical director for pediatric emergency services for Randall Children’s Hospital at Legacy Emanuel and Legacy Health. Dr. Nadler also serves as quality co-chair for Randall Children’s Hospital, is on the board of directors for Northwest Acute Care Specialists and the board of trustees for the Randall Children’s Hospital Foundation. Born in Minneapolis and raised in Israel, Dr. Nadler is a graduate of University of Minnesota. After receiving his medical doctorate from Sackler School of Medicine in Tel-Aviv, Dr. Nadler completed a pediatric residency program at University of Minnesota followed by a pediatric emergency fellowship at Children’s Hospitals and Clinics of Minnesota.

Gretchen Nichols, R.N. (Photo soon)

President of Legacy Health's Columbia Region
Legacy Health Partners Board of Managers

Gretchen Nichols, R.N., BSN, MBA, was appointed president of Legacy Health's Columbia Region, which includes Legacy Emanuel and Legacy Mount Hood medical centers, in 2019. She began her career at Legacy Health as the chief nurse executive at Legacy Mount Hood Medical Center in 2007 and has served as president of Legacy Mount Hood since 2009. In that role, she drove continuous improvement in patient care quality, increased employee engagement, strengthened collaboration and relationships with physicians, led the expansion and development of new programs and services and bolstered community outreach and engagement. Gretchen has served as a facilitator of systemwide efforts, including emergency services and labor management. Prior to joining Legacy, Gretchen led clinical operations in various healthcare organizations in California and Washington. Most recently, Gretchen served as interim president of Unity Center for Behavioral Health, where she oversaw the continued deployment of operational improvement plans. Gretchen has demonstrated high performance in all of her leadership roles at Legacy and is a well-known health care leader in East County

Greg Saunders

Greg Saunders, M.D.

Legacy Medical GroupĀ­ – Camas
Legacy Health Partners Board of Managers Vice Chair

Dr. Saunders is board-certified in family medicine. Born and raised in Anchorage, Alaska, he completed his undergraduate degree and medical degree at the University of Washington in Seattle. He completed his residency in family medicine at the University of Wisconsin in Madison. Dr. Saunders practiced in Vancouver, Washington, for 10 years. In 2008, Dr. Saunders joined Legacy Medical Group–Fisher’s Landing as clinic site director and a primary care physician. In 2012, he became a regional primary care medical director for Legacy Health’s four primary care clinics associated with Legacy Salmon Creek Medical Center and served as co-director of Legacy Health’s emerging leadership program.

Dan Tseng, M.D. (Bio coming soon)

Northwest Minimally Invasive Surgery
Clinical Collaboration and Performance Improvement Committee Vice Chair

Damon Warhus, M.D. (Bio coming soon)

Women's Healthcare Associates
Legacy Health Partners Board of Managers

Beau Weill, M.D.  (Photo soon)

Metropolitan Pediatrics
Legacy Health Partners Board of Managers

Dr. Weill is a general pediatrician with Metropolitan Pediatrics at their Beaverton location. He grew up in San Mateo, California, and moved to San Diego for undergraduate studies. He worked researching breast cancer in Boston prior to attending medical school at Albany Medical College in Albany, New York. He then completed his residency in pediatrics at Oregon Health & Sciences University. He stayed on as Chief Resident and founded and led the Doernbecher Healthy Lifestyles Clinic for overweight and obese children. He transitioned to an attending role and adopted new roles in the residency program as an Associate Program Director and led the education of the residents in the general pediatrics practices. Dr. Weill currently serves on the executive committee at Metropolitan Pediatrics.

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