Leadership.

Vision — Most Trusted Name in Health Care

When INTEGRIS decided to develop a vision statement for the organization, we wanted feedback from our most valuable commodity — our employees. More than 1,500 INTEGRIS employees were involved in discussions or surveys to develop our vision.

We feel it says a lot about who we are — we value trust as a guiding principle — and we aspire to be recognized for that. It is a big vision, but it is also a very personal one. From front-line to physician, from management to medicine, each of our employees can, and must, resolve to be the "most-trusted" in our given areas of responsibility, day-in and day-out. It is a commitment to one another as well.

Timothy Pehrson

President and Chief Executive Officer

Timothy Pehrson is the President and Chief Executive Officer of INTEGRIS, Oklahoma’s largest health care system.  

Pehrson comes to Oklahoma from Intermountain Healthcare, widely recognized as an innovative, high-quality health system. Pehrson worked at Intermountain for many years in which he held numerous operational and executive leadership roles. Most recently, Pehrson served in a dual role as Regional Vice President/CEO for the North Region and Vice President of Continuous Improvement for the entire health system.

In his role as CEO of the North Region, he was the market leader of a five-hospital region in Utah and Idaho. Pehrson played a pivotal role in the effort to integrate clinical services and functional areas. Those hospitals were recognized as “Truven 100 Top Hospitals” 12 times, and one of them received the Everest Award, which was given to 17 hospitals across the country that have the highest performance and the fastest long-term growth over five years.

As Vice President of Continuous Improvement, Pehrson designed and implemented the system’s enterprise-wide efforts to drive caregiver engagement and strong performance in safety, quality, patient experience, access, costs and growth.

Pehrson received his Master of Science degree in Health Services Administration from the University of Michigan. He graduated from Brigham Young University with a Bachelor of Arts degree in History.

Chris Hammes

Executive Vice President and Chief Operating Officer 

Chris Hammes is the Executive Vice President and Chief Operating Officer at INTEGRIS. Hammes joined INTEGRIS in 1990 as a radiology manager and moved into his current position in 2012. His responsibilities include oversight of operations for eight INTEGRIS-owned hospitals throughout Oklahoma as well as Lakeside Women’s Hospital and INTEGRIS Cancer Institute. Formerly, Hammes was Managing Director of the system’s metro facilities and President of INTEGRIS Baptist Medical Center. 

Hammes earned a Master of Science degree in Health Administration from the University of Oklahoma. He graduated from the University of Kansas with a Bachelor of Science degree in Allied Health Administration.

Hammes serves on the board of the Oklahoma Quality Foundation and the Oklahoma Hospital Association, and has formerly served as chair of the Greater Oklahoma City Hospital Council. Hammes mentors at Stanley Hupfeld Academy and participates in many community activities. He received the “Spirit of Innovation Award” from the Oklahoma Hospital Association. Hammes is a Fellow of the American College of Healthcare Executives and a Fellow of the Healthcare Advisory Board.

Tommy Ibrahim, M.D.

Executive Vice President and Chief Physician Executive

Tommy Ibrahim, M.D., is Executive Vice President and Chief Physician Executive of INTEGRIS, where he is the executive leader of INTEGRIS physician and medical staff leaders. He serves as the physician executive in charge of leading the strategic direction for clinical services throughout the health system, including all clinical excellence, quality and patient safety objectives.

Prior to joining INTEGRIS, Dr. Ibrahim was Chief Physician Officer at Mercy Health System in Des Moines, Iowa, and Chief Physician Executive at St. John’s Hospital in Springfield, Illinois.

Dr. Ibrahim received his Doctor of Medicine degree and his Bachelor of Medical Science degree from St. Christopher’s College of Medicine in Cambridge, England, and holds a Master of Science degree in Health Administration from Seton Hall University in South Orange, New Jersey.

He is a practicing hospitalist and boarded in internal medicine and hospital medicine. Dr. Ibrahim is a Fellow of the American College of Healthcare Executives and a Fellow in Hospital Medicine.

Kerri Bayer

Executive Vice President and Chief Nurse Executive

Kerri Bayer is the Executive Vice President and Chief Nurse Executive of INTEGRIS.  She serves as the nursing executive in charge of leading the strategic direction for clinical services throughout the health system, including all clinical excellence, quality and patient safety objectives.

Bayer earned her Master of Science degree in Nursing from the University of Oklahoma and a Bachelor of Science degree in Nursing from the University of Central Oklahoma. 

Bayer has more than 20 years of INTEGRIS nursing experience. Her background includes front-line nursing in intensive care, regulatory compliance, quality, safety, nursing education and many clinical leadership roles within INTEGRIS. Bayer is a member of the American Association of Critical Care Nurses.

Allison Petersen

Executive Vice President and General Counsel

Allison Petersen, J.D., is the Executive Vice President and General Counsel at INTEGRIS. As General Counsel, Petersen provides strategic leadership across the organization, primarily with evaluation, mitigation and resolution of legal and compliance needs. Most recently, she was the senior consultant to the executive management team at INTEGRIS, as well as legal counsel to INTEGRIS since 2013.

A graduate of the University of Oklahoma College of Law and the University of Oklahoma Health Sciences Center School of Public Health, Petersen holds both a Juris Doctorate and Master of Science degree in Health Administration.

Petersen is active in community service and is currently serving as a trustee appointed by the mayor of Oklahoma City on the Emergency Medical Services Authority, Oklahoma’s largest pre-hospital emergency medical service provider.

Mike Hatch

Executive Vice President and Chief Strategy and Transformation Officer 

Mike Hatch is the Executive Vice President and Chief Strategy and Transformation Officer at INTEGRIS. His responsibilities include strategic planning and forecasting, market intelligence and positioning, and growth and development.

Hatch graduated from Brigham Young University with both a Master of Business Administration degree and a Bachelor of Arts degree. Prior to joining INTEGRIS, he worked for Intermountain Healthcare for many years in various regional and system strategic planning roles.

Doug Smith

Executive Vice President and Chief Financial Officer

Doug Smith is the Executive Vice President and Chief Financial Officer of INTEGRIS. Smith has over 30 years of financial experience in health care. He comes to Oklahoma from Stanford Health Care, where he served as the Vice President of Finance.

Prior to his time at Stanford, Smith worked at Intermountain Healthcare for many years in various CFO capacities over 12 of Intermountain’s hospitals. Smith also has extensive finance experience working with Intermountain’s large medical group and health plan. He is a highly regarded, principle-based leader who couples a strong finance background with a deep commitment to mission-based health care.

Smith earned a Master of Business Administration degree and a Bachelor of Arts degree in Economics from Brigham Young University.

Wendy Chandler

Executive Vice President and Chief Human Resources Officer

Wendy Chandler is the Executive Vice President and Chief Human Resources Officer at INTEGRIS. She joined INTEGRIS in October 2019.
 
Chandler comes to Oklahoma from CHRISTUS Health, where she held a long and exceptional career in multiple human resources leadership roles since 1999. That health system employs a staff of 45,000, with over 15,000 physicians providing care.
 
Most recently, Chandler served as the Group Vice President, Human Resources, with oversight of acute ministries in Northeast Texas, Southeast Texas and Louisiana. Chandler has extensive experience in strategic planning, organizational transformation and all areas of human resources, including workforce management, employee engagement, leadership development and innovative staffing models. 
 
Chandler earned her Master of Business Administration degree from Texas A&M University and her undergraduate degree from Louisiana Tech University.

Carl Raczkowski, M.D.

President, INTEGRIS Health Partners

Carl Raczkowski, M.D., is President of INTEGRIS Health Partners. Dr. Raczkowski manages a network of 1,000+ physicians organized into a clinically integrated network. The concept of the clinically integrated network allows the independent physician, the employed physician, and INTEGRIS to work together to provide the best possible outcomes for patients.

Dr. Raczkowski is board certified in gastroenterology and has completed extensive training in the diagnosis and treatment of disorders of the esophagus, stomach, small intestine, colon, liver and gallbladder. He has been in private practice with Digestive Disease Specialists, Inc., since 1997.

A native of Tulsa, Dr. Raczkowski attended medical school at the University of Oklahoma College of Medicine. He completed his residency in internal medicine and his clinical fellowship in gastroenterology at the University of Oklahoma Health Sciences Center. He received his undergraduate degree from Northeastern State University in Tahlequah, Oklahoma. 

Dr. Raczkowski is a member of the American College of Gastroenterology, the American Gastroenterological Association, the Arkansas/Oklahoma Endoscopy Society and the Oklahoma State Medical Association.

Jeff Cruzan, M.D.

President, INTEGRIS Medical Group 

Jeffrey B. Cruzan, M.D., is a board certified family medicine physician and is Chief Medical Officer, INTEGRIS Medical Group.

Cruzan is originally from Picher, Oklahoma. He graduated from the University of Oklahoma in 1982 with a Bachelor of Science degree in Zoology and from the University of Oklahoma College of Medicine in 1985. He completed his residency in 1988, serving as chief resident during his final year. He has been practicing medicine for more than 25 years and has a passion for preventive health care.

Jordan Cash

President, INTEGRIS Southwest Medical Center 

Jordan Cash is President of INTEGRIS Southwest Medical Center in Oklahoma City. He joined INTEGRIS in 2008. Cash first served as Assistant Vice President for INTEGRIS Grove Hospital, followed by Assistant Vice President of Operations and Physician Practice Management at INTEGRIS Bass Baptist Health Center in Enid, Oklahoma. From 2014 until January 2017 he served as the President of INTEGRIS Miami Hospital in Miami, Oklahoma.

Cash earned a Master of Science degree in Health Administration from the University of Oklahoma. Cash is a Fellow of the American College of Healthcare Executives.

Avilla Williams

President, INTEGRIS Health Edmond

Avilla T. Williams has over 36 years of health care experience. She has been President of INTEGRIS Health Edmond in Edmond, Oklahoma since 2008, where she provided oversight for the development and construction of the 40-acre INTEGRIS Health Edmond hospital campus. She recently oversaw the design and development of Arcadia Trails Center for Addiction Recovery that was built on the INTEGRIS Health Edmond campus. Prior to joining INTEGRIS, Williams was with Deaconess Hospital in Oklahoma City, serving as the Vice President of Branch Operations and Strategic Development.

Williams received her Master of Science degree from Southern Nazarene University in Oklahoma City. She graduated from Hawaii Pacific University in Honolulu, Hawaii, with a Bachelor of Science degree in Nursing.

Williams serves on the Governing Council of the American Hospital Section for Metropolitan Hospitals, the Oklahoma Hospital Association, the Edmond Economic Authority Board of Trustees, the Langston University Urban Campuses Board of Trustees and the Oklahoma Tomorrow Board.

The Oklahoma Hospital Association awarded her the Spirit of Transformation Award in 2011. In 2016, she was recognized as one of the “50 Women Making a Difference” in Oklahoma by the Oklahoma Journal Record. In 2020 she was inducted to the Edmond Hall of Fame.

Teresa Gray

President, INTEGRIS Canadian Valley Hospital 

Teresa Gray is President of INTEGRIS Canadian Valley Hospital in Yukon, Oklahoma. Grey came to INTEGRIS in August 2011 where she immediately distinguished herself as a leader of the INTEGRIS Nurse Consortium. Gray earned national certification from the American Nurses Credentialing Center as a nurse executive and helped lead efforts that culminated in INTEGRIS Canadian Valley Hospital being named an ANCC Pathway to Excellence facility.

Prior to joining INTEGRIS, Gray worked with Foundation Surgical Hospital Affiliates. She earned a Master of Business Administration degree from Southern Nazarene University and a Bachelor of Science degree in Nursing from Oklahoma Wesleyan University.

Phil Lance

President, INTEGRIS Cancer Institute

Phil Lance is President of INTEGRIS Cancer Institute, comprised of six statewide locations. These include the main Cancer Institute campus in Oklahoma City, INTEGRIS Baptist Medical Center, INTEGRIS Southwest Medical Center, INTEGRIS Canadian Valley, INTEGRIS Health Edmond and INTEGRIS Bass Baptist Health Center in Enid.

Lance joined INTEGRIS in 1991 as a radiation therapist. He assumed greater areas of responsibility at INTEGRIS, eventually becoming President of the Cancer Institute in 2008. His responsibilities include oversight of operations of the Cancer Institute, as well as INTEGRIS Hospice and the INTEGRIS Hospice House. He also serves as the executive sponsor for the INTEGRIS Respiratory Consortium and the health system’s intern program.

He serves or has served on the board of Sunbeam Family Services, the American Cancer Society, Leadership Oklahoma City, the Leukemia and Lymphoma Society and the University of Oklahoma Health Sciences Center Alumni Association.

Lance earned both his undergraduate degree and Master of Science degree in Health Administration from the University of Oklahoma, He is a Fellow of the American College of Healthcare Executives. 

R. Mel Clark, M.D.

President, INTEGRIS Heart Hospital

Mel Clark, M.D., is an interventional cardiologist and president of INTEGRIS Cardiovascular Physicians at INTEGRIS Heart Hospital in Oklahoma City.

He attended medical school at the University of Oklahoma Health Sciences Center in Oklahoma City, where he completed his internship, residency and fellowship. Dr. Clark is board certified in both internal medicine and cardiovascular disease and was named one of the "Best Doctors in America" in 2007.

He is a member of the Jim Thorpe Association Executive Council and the Council on Cardiac Sonography, and is a Fellow of the American College of Cardiology. Dr. Clark has served on the Board of Directors for the INTEGRIS Health System, Oklahoma Health System and Plains Medical Association.

Kelley Brewer

President, Lakeside Women's Hospital

Kelley Brewer is President of Lakeside Women’s Hospital/INTEGRIS Network in Oklahoma City, where she oversees all operations.

She joined the development and planning team of the newly built Lakeside Women's Hospital in 1997 as Chief Clinic Officer. She was later promoted to Chief Operating Officer in 2000, and later she became President of Lakeside Women’s Hospital, which joined with INTEGRIS in 2013. Prior to that, Brewer had served in various hospital administration roles in the areas of women’s health, pediatrics and medical surgical units.

Brewer graduated from the University of Central Oklahoma with a Bachelor of Science degree in Nursing and began her career as a labor and delivery nurse. She later earned a Master of Science degree in Nursing from the University of Oklahoma with a concentration in Administration.

Finny Mathew

President, INTEGRIS Bass Baptist Health Center, Enid

Finny Mathew is President of INTEGRIS Bass Baptist Health Center in Enid, Oklahoma. He began his career at INTEGRIS in 2006 as an administrative resident and remained with INTEGRIS following his residency. In 2009 Mathew became Director of Operations for INTEGRIS Baptist Medical Center in Oklahoma City. Prior to his return to INTEGRIS, he most recently served as the Chief Executive Officer for Crossroads Community Hospital in Mount Vernon, Illinois.

After earning his Bachelor of Science degree from the University of Texas at Dallas, Mathew received a Master of Science degree in Health Administration from Trinity University in San Antonio. He is a graduate of the Leadership Oklahoma City, Inc.’s Loyal Class IV. Mathew is a member of the American College of Healthcare Executives.

Jonas Rabel

President, INTEGRIS Miami Hospital and INTEGRIS Grove Hospital

Jonas Rabel is President of INTEGRIS Miami Hospital and INTEGRIS Grove Hospital in Miami, Oklahoma and Grove, Oklahoma. Prior to that he was Vice President and Chief Nursing Officer at INTEGRIS Grove Hospital, and also became the Regional Director of Emergency Medicine for both INTEGRIS Grove Hospital and INTEGRIS Miami Hospital.

Jonas earned a Master of Business Administration degree from Oklahoma Wesleyan University and graduated from Northeastern Oklahoma A&M with a Bachelor of Science degree in Nursing. Born in Joplin, Missouri, Jonas was raised in Miami, Oklahoma and graduated from Miami High School in 2000.