HCA Houston Healthcare Kingwood is led by a team of more than 1,400 employees and 450 physicians, as well as excellent senior leadership team and Board of Trustees.

Senior Leaders

John Corbeil, Chief Executive Officer

John Corbeil joined HCA Houston Healthcare Kingwood in January 2019. He previously served as chief operating officer of Medical City Fort Worth, an HCA affiliated hospital in Dallas, Texas, for three years.

Corbeil earned both his bachelor’s degree in business administration and his master’s degree in health administration from the University of Iowa. He is a member of the American College of Healthcare Executives and Leadership North Texas. He is also a board member of The University of Iowa’s College of Public Health and Near Southside Inc., which is focused on economic development and city planning.

Virgil Winslow,
Chief Financial Officer

Kevin Manning,
Chief Nursing Officer

Robert Marmerstein,
Chief Operating Officer

Board of Trustees

The hospital is supported by an impressive Board of Trustees comprised of highly respected and accomplished physicians as well as community business leaders.

The role of Kingwood’s Board of Trustees is to assist in evaluating the hospital’s delivery of healthcare and development of new service lines and programs that ensure our patients are provided the most advanced technology and cost effective health care close to home.

Carol Sutton, Board of Trustees - Chair

Carol Sutton moved to Kingwood in 1994 with her husband (Randy) and two daughters (Alison and Megan) and began working at the Lake Houston Family YMCA. She retired from the Y in 2014 after 20 years as the Community Liaison and was responsible for marketing, membership, community involvement and coordinating the two fundraising events: Bridge Fest 5K and Dancing for Partners.

During her years at the Y she assisted with two capital campaigns, which completed expansions of the building allowing the Y to provide more services and programs to thousands of families in the Lake Houston area.

Carol has also been a dedicated volunteer in the community and has served with National Charity League, Humble ISD Foundation, American Heart Association, Lake Houston Area Chamber of Commerce, FamilyTime, City of Houston Mobility Study Committee, Good Shepherd Episcopal Church, Chi Omega Alumnae Association and is currently serving as the lead Advisor for the Chi Omega Chapter at the University of Houston. She and her husband are LSU graduates, avid Tiger fans and enjoy following LSU sports (Geaux Tigers!).

Robert Sitton, Board of Trustees - Past Chair

Robert Sitton was born, raised and continues to live in the Humble community. He is a 1982 graduate from Humble High School and a 1988 graduate from Sam Houston State University with Bachelor of Business Administration degree.

In 1998, Robert began his career in the financial services industry with Morgan Stanley Dean Witter before accepting a position with Edward Jones Investments in 2002, where he continues today. His office is located in Atascocita.

Prior to entering the investment profession, Robert was a Teacher and Coach at Aldine Senior High in the Aldine Independent School District. During his tenure, the Mustangs won the 1990 State 5A Football Championship and were named High School Football National Champions. The Aldine staff was later named to coach the Texas High School Football All-star game in 1992.

Volunteerism and the community are two of Robert's passions. In 2011, he was elected to serve on the Humble ISD Board of Trustees and re-elected in 2013. He serves on the Finance, Building and Planning and the Program Evaluation committees. He has also served as Board Parliamentarian, Secretary and is the current Vice President of the board. Prior to being elected, Robert served on the 2008 Bond Study committee and the Humble ISD Education Foundation Board. While with the Foundation, he chaired the Endowment and Visionary committees. Robert also serves on the Lake Houston Chamber of Commerce Board of Directors, where he is currently the Chair-Elect. He has chaired the Chamber's largest fundraiser, the Chamber Classic and the Party on the Green for the past six years. Locally, Robert has served as coach, parent and board member, for several youth sports organizations and spent ten years volunteering for the Houston Livestock Show & Rodeo.

Married to his wife, Jennifer (Jen), for 9 years they have a his/hers/ours family. Jon, wife Katherina and little RJ, live in Atascocita while Cody is serving in the United States Navy and Keanen and Kaitlyn continue to live in the family home in Eagle Springs and attend Humble ISD Schools. The Sitton family attend Second Baptist Church in Kingwood.

Noel Boyd, M.D. Chief of Staff, Kingwood Medical Center

Dr. Boyd is a native Texan, born in Austin and raised in Houston, growing up in Clear Lake. She graduated from the University of Texas in 1992 with a BA in English-Honors. She then returned to Houston where she received her MD with Honors from Baylor College of Medicine in 1997. She decided a change of scenery was in order and did her residency in Denver, Colorado at University of Colorado Health Sciences Center. She was in private practice for one year in New York before “coming home” to Kingwood in 2002.

Cordell Okezie Nwokeji, M.D. – Chief of Staff Elect

Dr. Cordell Nwokeji graduated with a bachelor's degree in Biology from Colgate University in Hamilton, New York. He earned his medical degree at Howard University, College of Medicine in Washington, D.C. He completed his general surgery residency at Morristown Memorial Hospital, Morristown, New Jersey and Howard University Hospital in Washington, D.C. He completed his urology residency at Southern Illinois in University, Springfield, IL. Dr. Nwokeji specializes in general urology with an emphasis in minimally invasive prostate cancer therapy.

Dr. Nwokeji is certified in Urology by the American Board of Urology. He is a member of the Harris County Medical Society, the Texas Medical Association, the American Urological Association and the Houston Urologic Society. Dr. Nwokeji is a partner and member of the Executive Counsel for Texas Urology Specialists.

Dr. Nwokeji is married to his wife Aimee, and he enjoys exercising, soccer, weight lifting, and ping pong. In his spare time, he is a field coach in Track Houston Organization and an assistant coach for junior league basketball teams.

Stephen Ratcliff, M.D., Past Chief of Staff, Kingwood Medical Center

Dr. Stephen Ratcliff graduated with a bachelor’s degree in Print Journalism from Baylor University in Waco, Texas. He went on to complete medical school at the University of Texas Medical Branch in Galveston, Texas and residencies in internal medicine at Baylor College of Medicine in Houston, Texas, and in anesthesia at Beth Israel Deaconess Medical Center in Boston, Massachusetts.

Dr. Stephen Ratcliff, MD is a board certified anesthesiologist. He is a member of the Harris County Medical Association, the Texas Medical Association, and the American Society of Anesthesiologists.

Dr. Ratcliff was commissioned as 2nd Lieutenant in the Texas Army National Guard and as a Major in the United States Air Force Reserves. In addition to his service, he has volunteered in Guatemala as anesthesiologist for the non-profit group Faith In Practice. Dr. Ratcliff is the Chief of Staff Elect and serves as the Director of Anesthesia, Podiatric Surgical Residency Program, at Kingwood Medical Center. He and his wife, Jeanine, have been married for four years and have a 21-month-year-old son, Samuel.

Scott Brady

Scott Brady is a native Houstonian and a proud University of Houston graduate, earning a Bachelor of Architecture degree.  Scott is a partner with Joiner Architects, and has been practicing architecture for 25 years.  He is involved with many professional organizations, and is an active member of the Association for Learning Environments, which focuses on the “built learning environment,” and its effect on students and overall academic improvement.

Scott is very involved with many community organizations, including: Rotary Club of East Montgomery County; the Lake Houston, and Greater East Montgomery Chambers of Commerce; Humble ISD Education Foundation; and the Lake Houston Family YMCA.  He chaired the 2015 Heart Walk, to help bring awareness and prevention measures for heart disease and stroke.

Scott and his wife, Tracy are both Humble High School Graduates, and have three children; Amber, Heather and Jessica.

Rick Ganim, MD, FACC, FSCAI

Dr. Rick P. Ganim graduated with honors from the University of Texas Medical School in Houston. While attending medical school, he was a member of the Alpha Omega Alpha Honor Medical Society. He continued his education at UT Medical School and completed his fellowship in interventional cardiology.

Dr. Ganim is board certified in interventional cardiology, general cardiology, and internal medicine. From 2009 to 2012, he served as Chairman of Cardiovascular Medicine at Kingwood Medical Center, and in 2014 served as Chief of Staff. From 2013 to 2015, he was recognized as a “Texas Monthly Super Doctor, and in 2012 received the “Healthcare Professional of the Year Award” from the Lake Houston Chamber of Commerce.

He is currently a Clinical Assistant Professor of Medicine at UT Medical School in Houston and the Director of Cardiovascular Services at Kingwood Medical Center. In addition, Dr. R. Ganim is a partner with Vital Heart & Vein, specializing in coronary and peripheral interventions. He is also involved in coronary artery stent research and drug therapy trials for various cardiovascular diseases.

Dr. Ganim is married with three children and proudly serves patients in the Kingwood, Humble, and Houston communities.

Erica Johnston

Erica Johnston is proud to wear many hats, however, she gets the greatest joy and blessing from her role as wife of twelve years to Duane, and mom to her amazing children, Emma (8) and Mason (5).

Professionally, Erica coordinates the marketing efforts and community involvement for her husband’s business. She is a graduate of several community leadership programs including: Leadership Lake Houston (Lake Houston Area Chamber of Commerce); and Leadership North Houston (Lone Star College). Erica serves on the boards of many organizations including: The Lake Houston Family YMCA; Holy Trinity Episcopal School; she is the Chairman of Leadercast Lake Houston (an area leadership conference); and is an active volunteer at their church, Second Baptist Kingwood. In addition, she is an Education Ambassador for Bright Pink, a non-profit organization focused on educating young women ages 18-45 about breast and ovarian health.

Erica spends her “off time” watching and cheering on her children on the soccer field and the swimming pool, taking family bike rides, and catching a Zumba class or two. She is honored to serve on the Kingwood Medical Center Board of Trustees.

Christy Lapeze

Christy Lapeze graduated from the University of St. Thomas in Houston with a degree in liberal arts. After graduation, she worked at the Children’s Museum of Houston for several years in development. Once her son, Luke, was born she was privileged to stay at home with him.

Christy was an active volunteer on the Fall Creek Elementary PTO for six years. She has held other volunteer positions in the community, and with her husband, Keith, she has actively supported many local charities.

Chirag Parghi, MD

Dr. Chirag Parghi is a board certified radiologist and fellowship-trained Breast Imager who joined West Houston Radiology Associates in July of 2013. He received his Bachelors degree in Chemical Engineering at the University of Missouri-Columbia, where he graduated Summa Cum Laude and subsequently attended Baylor University College of Medicine, where he graduated in 2006. After completing his internship at Baylor, he completed a residency in Diagnostic Radiology at the George Washington University Hospital where he was a chief resident (2011-2).

Dr. Parghi then completed a one year fellowship in Breast Imaging at the Baylor University Medical Center in Dallas, Texas. His clinical interests are focused on the early detection and aggressive management of breast cancer. He advocates for a comprehensive approach towards diagnosis and treatment with an emphasis on emerging technologies including Breast MRI and Tomosyntesis. Dr. Parghi has helped develop a high-risk screening program at Kingwood Medical Center and developed clinical pathways to expedite oncologic care after the diagnosis of breast cancer. Dr. Parghi works exclusively at the Kingwood Medical Center.

Salvador Recio, M.D.

Dr. Salvador Recio graduated with a bachelor’s degree in biology from the University of Puerto Rico. He went on to earn his medical degree at Ponce School of Medicine and his residency in internal medicine at Seton Hall University in Elizabeth, New Jersey.

Dr. Recio is a board certified in internal medicine and has been in practice for 23 years. He is a member of the Harris County Medical Society and the Texas Medical Association. Dr. Recio is a partner in Millennium Physicians Association, PLLC.

Nancy Shortsleeve

Nancy Shortsleeve, a successful business woman and entrepreneur, is the founder, owner and president of LogoStuff. Since moving to the area in 1989, she has been involved in the Lake Houston Area Chamber of Commerce.

Aside from her work with the Chamber, Shortsleeve actively supports FamilyTime, The Door and HAAM (Humble Area Assistance Ministries), where she serves on their long range planning committee.

She received the FamilyTime Woman of Achievement Award in special recognition of her commitment and service to the community in 2004.

Shortsleeve sings in the choir for Atascocita United Methodist Church where she serves as the church’s Lay Leader and is a past Youth Pastor. She and her husband Kenny have lived in Atascocita since 1989.

Troy A. Villarreal, President, HCA Gulf Coast Division

Troy A. Villarreal joined HCA Gulf Coast Division as President in June 2016 from Medical City Dallas Hospital, where he had been chief executive officer since October 2013. Before that, he was the chief executive officer at The Medical Center of Plano for five years.

He earned his bachelor’s degree in psychology at Texas A&M University and master’s degrees in health care administration and business administration at the University of Houston-Clear Lake. He is a fellow in the American College of Healthcare Executives.

Villarreal has a strong history of community service. He is a graduate of Leadership Plano Class 27 and formerly served on the executive committee board, strategic planning committee, and alumni committee of Leadership Plano. He also has served on the board of the Plano Chamber of Commerce as campaign cabinet chair for Collin County and as a member of the advisory board of the United Way of Greater Dallas.

Since joining HCA in 1993, Villarreal has been responsible for major facility upgrades, significant growth, and increased patient, physician and employee satisfaction at a variety of HCA hospitals.