HCA Houston Healthcare Clear Lake is an HCA affiliated hospital and a proud member of HCA Houston Healthcare. Our hospital is led by a team of over 2,000 employees and more than 900 physicians. Our staff is supported by our CEO and an impressive board of trustees that includes highly-respected physicians and community business leaders.

Our board members ensure that our patients receive the most advanced healthcare close to home in Houston. Our board members help:

  • Develop the hospital’s strategic direction
  • Evaluate the hospital’s delivery of care
  • Facilitate the development of new services

Meet our CEO

HCA Houston Healthcare Clear Lake CEO, Todd Caliva, has over 24 years of experience as a healthcare professional and has served as chief executive officer since October 24, 2016. Caliva has been with HCA Houston since 1997 and has previously served as CEO of HCA Houston Healthcare West and East Houston Regional Medical Center. He has also served HCA-affiliated hospital, The Woman’s Hospital of Texas as chief operating officer and administrator of Sugar Land Medical Center Surgical and Diagnostic Center.

Caliva’s robust community involvement includes:

Caliva earned a master’s degree in business administration and a bachelor’s of science in marketing from the University of Houston.

Meet Our Board of Trustees:

Patrick Koons, M.D., Chairman

Dr. Koons is a board certified anesthesiologist and managing member of Guardian Anesthesia Services. He joined the staff at HCA Houston Healthcare Clear Lake in 2006 and has been the chief of the anesthesiology department since 2009. Dr. Koons completed a critical care fellowship and his anesthesiology residency at the University of Texas Medical Branch at Galveston. He was awarded his doctor of medicine also from the University of Texas Medical Branch at Galveston. He received his bachelor of science in biology from the University of Texas at Austin. Dr. Koons and his wife, Shay, have two daughters and reside in Friendswood.


Nadir Ali, MD

Dr. Nadir Ali is a practicing Interventional Cardiologist in the Clear Lake and Bay Area community for the last 15 years. He was a Bugher Foundation Research Fellow at Baylor College of Medicine and did his cardiology fellowship at the same institution from 1990 to 1994. He has received many awards during his training including the Best Resident Award at Wayne State University, Detroit Michigan, and The Van Reet Award given to the best graduating fellow at Baylor College of Medicine, Houston, Texas. He was on academic faculty of Baylor College of Medicine from 1994 to 2000 before moving to the Clear Lake Area. He received the Faculty Award at Baylor College of Medicine for Faculty Demonstrating clinical excellence in 2008.

He was selected as the first Chairman, Department of Cardiology at HCA Houston Healthcare Clear Lake in 2006 and served in this position till 2012. He is a busy interventional cardiologist who introduced to the Clear Lake Area the technique of Radial Angiography and Interventions (heart procedures done from the wrist artery) and Carotid Artery Stenting along with his surgical Colleagues. He has special interest in Diet, Obesity and Heart disease and gives a free diet seminar for his patients once a month on the last Wednesday of every month at 6 p.m. at the Searcy Auditorium in the Clear Lake Heart and Vascular Institute. His other interests include spending time with his wife and two boys, cycling and hiking and backpacking in the National Parks.


Mark Ciavaglia

Mark is an attorney in Texas City with the firm Linebarger, Groggan, Blair and Sampson, LLP. He is heavily involved in civic activities including the Texas City Rotary, the Texas City-La Marque Chamber of Commerce board of directors, and the Texas City I.S.D. Foundation for the Future. Mark and his wife, Sharon, reside in Texas City with their three children. Mark served as our Board Chairman for the term 2012-2014.


Mark Conrad

Mark Conrad is the owner of Express Employment Professionals which helps local client companies that are frustrated with what’s costing their business money and how the talent within their organization impacts their company’s profitability. Conrad’s areas of expertise include employee recruitment, placement for temporary, contract and direct hires, specialized HR support and leadership training. Conrad owns two franchise locations that service the Houston Bay Area, Brazoria County and Galveston County.

Raised in Iowa, Conrad attended the University of Northern Iowa and the University of Phoenix. He is a member of various local economic organizations, chambers and the Texas Bay Area SHRM chapter. Conrad is currently serving on:

  • The board of the 101 Brightest Companies in Houston
  • Clear Lake Chamber of Commerce
  • Communities in Schools – Bay Area
  • Community and Economic Development for the City of Friendswood
  • Bay Area Houston Economic Partnership and chairs the Small Business Committee


Ryan Dennard

Ryan Dennard is the Executive Director of Criss Cross Commercial Group, a retail real estate investment and development firm. Dennard formerly served as a Galveston County Commissioner, representing Texas City and the Clear Lake regions of Galveston County. He also previously practiced law at Locke Lord LLP. He is an honors graduate of Clear Creek High School, Washington & Lee University and the University of Texas School of Law. Ryan and his wife, Melissa, live in League City with their four children.


Richard Gornto

Richard Gornto, CFP is President of First Financial, Inc., an investment management company that manages investments for county governments. He is nationally recognized for his development, implementation and management of THE ALTERNATE PLAN, sometimes called the Galveston Plan, which has had a 34-year record as a successful privatized alternative to Social Security.

Gornto retired in March of 2015 and has taken a role as the Chair of the new Houston group of Tiger 21. He graduated from the University of Louisiana Lafayette and has continued his education and received certifications in financial planning, business value building, retirement planning, Birkman assessments and personal coaching. He has also received licenses in insurance counseling, property and casualty insurance, life insurance, securities and real estate. Gornto mentors and works with at-risk and abused children through Communities in Schools Bay Area.

He currently serves on the boards of the Nolan Ryan Foundation and Communities in Schools Bay Area. In the past, Gornto served on the boards of Alvin National Bank, Alvin Community College and Houston Child Advocates. He has been married to his wife, Janice, since 1971 and is an avid “Poppy” to his five grandchildren. His hobbies include philanthropy, golf, hunting, fishing, skiing and scuba diving.


Joy Kelly

Joy Kelly is vice president and Deputy general manager of the Jacobs Clear Lake Group which provides design, development, and testing of spacecraft and associated systems for human spaceflight and astromaterials curation and basic research at NASA’s Johnson Space Center (JSC). Joy has joint responsibility for over 800 personnel and annual revenues of $136 million. She is an Associate Fellow for the American Institute of Aeronautics and Astronautics (AIAA) and a member of the Institute of Electrical and Electronics Engineers (IEEE). She has a BS and MS in Electrical Engineering from the University of Colorado, and Ph.D. in Electrical Engineering from Colorado State University.


Beverly Lewis, MD, Vice President Medical Staff CLRMC/MMC Chief of Staff MMC

Dr. Lewis currently serves as the Chief of Staff for Mainland Medical Center and the VP of the joint medical staff for HCA Houston Healthcare Clear Lake. She is a general surgeon who primarily practices in Galveston County. She joined the medical staff at HCA Houston Healthcare Clear Lake in 1986. Dr. Lewis received her doctor of medicine from Baylor College of Medicine in Houston and completed her residency at the University of Texas Medical Branch. She is in private practice and her office is located in Texas City.


Gautam Malkani, MD

Gautam Malkani is the medical director of the pediatric intensive care unit (PICU) at HCA Houston Healthcare Clear Lake. He completed his pediatric residency training at Maimonides Medical Center in Brooklyn, NY and fellowship training in pediatric critical care at New York Presbyterian hospital – Cornell Medical School in New York, NY. Malkani also provides palliative and hospice care for terminally ill children in the Houston region.


Brian Miles, MD, President Medical Staff CLRMC/MMC Chief of Staff CLRMC

Dr. Miles currently serves as the Chief of Staff for HCA Houston Healthcare Clear Lake and serves as the president of the joint medical staff for HCA Houston Healthcare Clear Lake and Mainland Medical Center. He is board certified in neuroradiology and joined the medical staff in 2006. He received his bachelor of science in biology from Southern Nazarene University and his doctor of medicine from the University of Texas Medical Branch in Galveston. Dr. Miles completed his residency in diagnostic radiology in 2005 from Medical College of Georgia. He and his wife, Kimberly, reside with their three children in Houston.


Bernard Milstein, MD

Dr. Milstein is a pioneer in the field of laser vision correction and has performed more than 1,500 LASIK procedures. He is also at the forefront in the surgical treatment of cataracts. Dr. Milstein is a fellow of the American Academy of Ophthalmology, is a past president of the Texas Ophthalmological Association, is a member of the Texas Medical Association and is a member of the Galveston County Medical Society. He has spent many years as a clinical professor of ophthalmology at the University of Texas Medical Branch and instructs residents in advanced cataract and refractive surgical techniques. Additionally, Dr. Milstein is involved in countless committees and organizations throughout the Houston Bay Area.


Robert Mitchell

Bob Mitchell is the president of Bay Area Houston Partnership and has worked in economic development, process controls and manufacturing management in the Houston region for more than 30 years. He has spent over two decades in management as a highly successful executive in both for-profit and non-profit enterprises. Additionally, Mitchell has demonstrated his ability to develop, manage and implement strategic plans for international companies. He is a big believer in supporting the community and actively donates his time in numerous capacities.

In September 2009, Texas Governor Rick Perry appointed Mitchell to his Aerospace and Aviation Advisory Committee. Mitchell serves on numerous boards including:

  • Manned Spaceflight Education Foundation, Inc.
  • HCA Gulf Coast Regional Advisory Board
  • Rotary National Award for Space Achievement Board of Advisors
  • Greater Houston Convention and Visitors Bureau
  • Gulf Coast Limestone, Inc.
  • Houston Technology Center Advisory Board
  • Board of Visitors Texas A&M University Galveston
  • Communities in Schools

Mitchell has three children and resides in Houston.


Henry Muniz, MD

Dr. Muniz is board certified in internal medicine, nephrology and has worked with Renal Specialists of Houston since 1985. He performed his residency training and fellowship in internal medicine at the University of Utah in Salt Lake City. Dr. Muniz has served on various committees at HCA Houston Healthcare Clear Lake as well as chief of staff over his tenure on staff. He is also a clinical assistant professor at Baylor College of Medicine.


Bich G. Nguyen, MD

Dr. Nguyen is a Board Certified internal medicine physician and partner of Beeler-Manske Clinic LLP. He has been on staff at Mainland Medical Center for the past 19 years. He completed his internship and residency at Baylor College of Medicine in Houston. Dr. Nguyen is involved in numerous committees and organizations in the Galveston County Area. He resides in Friendswood with his wife, Lee and two sons. As a family, they enjoy vacationing and hiking as time permits.


David Nickeson, MD

Dr. David Nickeson is board certified in Internal Medicine and has been on staff at Mainland Medical Center since 1989. He is currently in private practice at Mainland Pulmonary Associates. Dr. Nickeson was awarded his M.D. degree from Jefferson Medical College and his Bachelor of Science from Pennsylvania State University with highest distinction. Dr. Nickeson has served on numerous committees at Mainland Medical Center and most recently served as CPOE Chairman. Dr. Nickeson serves as President of the Galveston County Medical Society.


Catherine Potter

Kitty was president of Texas First Bank for 20 years, and then served Texas Independent Bancshares, Inc. for five years as chief financial officer. She is now Corporate Secretary and Corporate risk manager for Texas Independent Bancshares, Inc. and Texas First Bank. She is an advisory board member for both Texas First Bank and Texas Independent Bancshares, Inc. and serves on the boards of Rust-Ewing Insurance and United States Management Corp. She is a graduate of LSU with BS in Business and of the UH-Clear Lake with a degree in accounting and an MBA. She is a CPA. She has served Chairman of the Mainland Communities United Way and Texas City-La Marque Chamber.

She has been recognized by the Chamber as Citizen of the Year and inducted into the Hall of Honor for TCISD. She is Past President for the Rotary Club of Texas City, a Multiple Paul Harris Fellow inducted into the Rotary Roll of Fame and received the Rotary Vocational Service Award. She was the first recipient of the Female banker of the Year for Texas First Bank. She and her husband Gary reside in Texas City and have three grown children.


Eduardo S. Ramirez, M.D.

Dr. Ramirez joined the staff of HCA Houston Healthcare Clear Lake in January 1996. He received his medical degree from Ponce School of Medicine in Ponce, Puerto Rico in 1990 and a Bachelor of Science degree from the University of Puerto Rico in 1986 and completed his Residency in Internal Medicine at Yale University/Norwalk Hospital. Dr. Ramirez is a member of the EmCare Hospitalist Group. Dr. Ramirez and his wife Sigrid reside in Friendswood with their two children.


Rakesh Shah, MD

Dr. Shah is a Board Certified Interventional Cardiologist and president of Bay Area Heart. He joined the staff of the HCA Houston Healthcare Clear Lake in 2003 and has served as Director and Chairman of the Department of Cardiology since 2005. He has been active member of the Cardiovascular Center of Excellence committee at the HCA Houston Healthcare Clear Lake since 2006. Dr. Shah completed his Internal Medicine residency, Cardiology fellowship and Interventional Cardiology training at Medical College of Virginia/ Virginia the Commonwealth University at Richmond, Virginia. Rakesh has been married to Poonam Shah for 23 years and has three daughters and resides in Clearlake area.


In Soo Yo, MD

Dr. Yo is a Board Certified General Surgeon and a Fellow of the American College of Surgeons. He has served as the Chief of Surgery Department and Trauma Director at HCA Houston Healthcare Clear Lake. Dr. Yo is currently a partner at Surgical Specialists of Clear Lake. He completed his Surgery training at Alton Ochsner Medical Foundation Hospital in New Orleans, Louisiana. Dr. Yo received his Doctorate of Medicine from Texas A & M HSC and completed his Bachelor of Arts degree at the University of Texas in Austin. He and his wife Min have two children and reside in Clear Lake.


Kay Stenzel

Kay received her Bachelor of Science in education in Missouri and has taught school in Missouri and Texas. She was a classroom teacher in Alvin and Santa Fe before retiring from teaching in the Texas City ISD. She has been a resident of Santa Fe since 1988. Kay, a mother and grandmother, is involved in numerous civic activities and is a hospice volunteer. She resides in Santa Fe with her husband, Ralph, who is currently mayor of the City of Santa Fe.


Tommy Tollett

Tom is president and owner of Tommy’s Restaurant Oyster Bar Inc. and has been at the Bay Area Location for 20 years. Before opening Tommy’s, Tom spent 18 years working in various restaurants in Kemah, Texas. He serves as board member of the Galveston Bay Foundation and as a member of the Port of Houston Authority Chairman’s Citizen Council. Tom has been involved with Bay Area Houston Economic Partnership committees’ including Maritime Committee, Small Business Committee and Health Care Committee. Tom is married to Laurian White Tollett, and has three children who were all born at HCA Houston Healthcare Clear Lake. He resides in the Clear Lake area.


Troy A. Villarreal, President, HCA Gulf Coast Division

Troy Villareal, 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.