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 more than 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.

Meet our Senior Leadership

Todd Caliva, Chief Executive Officer

Todd Caliva serves as Chief Executive Officer of HCA Houston Healthcare Clear Lake and is regarded in the industry as a consummate healthcare professional. He has more than 24 years of experience, including a decade at the multi-facility level. He has been with HCA in Houston since 1997.

In prior roles, Mr. Caliva served as Chief Executive Officer of HCA-affiliated HCA Houston West and East Houston Regional Medical Center and Chief Operating Officer of HCA-affiliated The Woman's Hospital of Texas. His strategic vision, leadership, compassion and relationship-building skills allowed those facilities to flourish in its staff recruitment, patient and visitor experience, and market presence.

Caliva believes commitment to quality healthcare begins with employees. If employees enjoy what they do and are committed to our values, then our patients will get the quality care and service they deserve.

Caliva's robust community involvement includes:

  • Chairing the Southeast Texas Regional Advisory Council (SETRAC) Cardiac Care Committee, an organization that is committed to improve the overall care for heart attack patients across the region.
  • Serving as the president/chairman of the Educational Foundation of the Southeast Texas Chapter of the American College of Healthcare Executives.
  • Currently serving as Regent of the Southeast Texas Chapter.
  • Serving as Chairman of the Board for Bay Area Houston Economic Partnership.

Caliva earned a master's degree in business administration and a bachelor's of science in marketing from the University of Houston. He is the proud parent of two daughters, Sophie and Cara.

John O. Armour, Chief Financial Officer

As a 22-year veteran of HCA, John Armour currently serves as its chief financial officer (CFO) of HCA Houston Healthcare Clear Lake. Armour has held senior leadership positions for an excess of 18 years, all in the Gulf Coast Division. John has 15 years of CFO experience and was formerly CEO of Parallon Business Solutions Supply Chain Services/Gulf Coast Division.

Armour has been an active member of the Houston Golf Association since 2008 and on its board of directors for the past five years. A former chair of the audit committee and board treasurer, he currently serves as vice chairman.

Jim Russell, Chief Operating Officer

Jim Russell serves as HCA Houston Healthcare Clear Lake's Chief Operating Officer. He has most recently served as the COO at The Woman's Hospital of Texas, a 419 licensed bed facility medical facility, serving women, newborns and children.

During his time at The Woman's Hospital of Texas, Jim was the key strategic business partner, involved in the recruitment and onboarding of new physicians, and the transition of services to new partners. He also served as the executive sponsor for the Gulf Coast Division Surgical Services Improvement committee were he strategically designed and implemented new processes for surgical room turnaround times.

Prior to that, Jim served as the COO for Medical City Lewisville in the HCA North Texas Division. While at Medical City Lewisville, Jim actively participated in the successful recruitment of key physicians and led the development of the Level III designation.

Jim graduated with a Master in Business Administration from Texas Woman's University in Denton, Texas and has a Bachelor of Science in Nursing.

He and his wife Jenna live in southeast area with their two children, nine year old Benjamin and Sophie, who is four.

Sherry Camacho, Chief Nursing Officer

Sherry Camacho is the Chief Nursing Office at HCA Houston Healthcare Clear Lake. Sherry was previously CNO at HCA's Valley Regional Medical Center in Brownsville. She has over twenty years with HCA and is passionate about healthcare and nursing. Sherry holds a Bachelor's of Science degree in Nursing and a Master's degree in Healthcare Administration from Western Governors University.

Sherry has been married to her high school sweetheart Bernie for over 25 years. She has two beautiful daughters, Bernadette and Brigitte. She is also a strong believer in giving back to the community through volunteer work.

Meet our Board of Trustees

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

Richard Gornto, Chairman of the Board

Rick Gornto, CFP is President of First Financial, Inc., 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 successful privatized alternative to Social Security.

Additional, he has been managing partner of DRDA, LLC, a midsize CPA firm and there was co-leader of the consulting service division with one of his partners specializing in M&A activity, tax strategies, retirement planning and executive assessment.

He retired March 1, 2015, and has taken a role as the Chair of the new Houston group of Tiger 21. He is also a member of Tiger 21 in New York City. Since college at University of Louisiana Lafayette, he has continued his education and received certifications in financial planning, business value building, retirement planning, Birkman Assessments, and personal coaching as well as licenses in Insurance Counseling, P&C insurance, life insurance, securities and real estate.

He has a passion for helping people develop both personally and professionally and to that end he mentors and works with at-risk and abused children through Communities in Schools Bay Area, a nonprofit organization. He currently serves on boards of the Nolan Ryan Foundation and Community in Schools Bay Area for at-risk children. His past boards include Alvin National Bank, Alvin Community College and Houston Child Advocates for abused children.

He has been married to Janice since 1971 and is an avid “Poppy” to his five grandchildren. Hobbies are philanthropy, golf, hunting, fishing, skiing and scuba diving.

Nadir Ali, MD, Vice Chair Board of Trustees

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 – 2008. He was selected as the first Chairman, Department of Cardiology at Clear Lake Regional Hospital 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 6:00pm 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.

Beverly Lewis, MD, President Medical Staff/Chief of Staff

Dr. Lewis currently serves as Chief of Staff for Mainland Center. She also serves as the President of the joint Medical Staff for Clear Lake Regional Medical Center and Mainland Medical Center.

Dr. Lewis is a General Surgeon who primarily practices in Galveston County. She joined the medical staff 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. Dr. Lewis is in private practice and her office is located in Texas City.

Beth Files, MD, Vice President Medical Staff/Chief of Staff

Beth Files, MD received her medical doctorate from the University of Chicago Pritzker School of Medicine. She completed her residency at Baylor College of Medicine in Houston, Texas where she was OB/GYN Administrative Chief Resident. She graduated with honors from Purdue University with a Bachelor of Science degree.

In her early career Dr. Files has gained experience in participating in research in such diverse fields such as ultrasound, osteoporosis screening, physician screening practice in the elderly and muscular response to visual stimulation. She gained experience by completing a six-week externship in general medicine at St. John Hospital in Bangalore, India. Dr. Files was also a volunteer at the Shiloh Clinic for the Homeless and the Lafayette Crisis Center.

Dr. Files is a member of the Texas Medical Association and the Harris County Medical Society. Dr. Files is also Board Certified with American Board of Obstetrics and Gynecology. She is also a Fellow of the American College of Obstetrics and Gynecology. She is married and has two children.

Mark Ciavaglia

Mark is a partner with the law firm of Linebarger Goggan Blair & Sampson, LLP, serving as managing partner of the firm’s Galveston County office.

He is heavily involved in civic activities, having served as founding Director for the Texas City ISD Foundation for the Future, founding Board Member of the Advocacy Center for Children of Galveston County and former Board Chairman of the Texas City-La Marque Chamber of Commerce. Mark is Past President of the Texas City Jaycees, Noon Optimist Club of Texas City and Mainland Community Crime Stoppers. Mark and his wife Sharon reside in Texas City. 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.

Expertise includes employee recruitment and placement for temporary, contract and direct hires, along with specialized HR support and leadership training. Express is a wholly franchised employment and workforce development company with over 750 locations in the United States, Canada and South Africa with over $3B in revenues. Mark owns two franchise locations that service the Houston Bay, Brazoria County and Galveston County Areas.

Prior opening his business in 2004, Conrad held various sales, management and executive positions for over 20 years with Aggreko PLC, a global leader in the supply of temporary power and temperature control equipment headquartered in Scotland. Raised in the Midwestern state of Iowa, Conrad attended the University of Northern Iowa and the University of Phoenix, and is a member of various local economic organizations, chambers and the Texas Bay Area SHRM chapter.

Conrad currently serves 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 organization’s Small Business Committee.

Ryan Dennard

Ryan Dennard is the Executive Director of Criss Cross Commercial Group, a retail real estate investment and developing firm. Formerly he served as a Galveston County Commissioner, representing Texas City and the Clear Lake regions of Galveston County, and practiced law with 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. They are active in many community organizations and projects throughout the Bay Area.

Patrick Koons, M.D.

Dr. Koons is a Board Certified Anesthesiologist and Managing Member of Guardian Anesthesia Services. He joined the staff of Clear Lake Regional Medical Center in 2006 and has been the Chief of the Department of Anesthesiology since 2009. He 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. Dr. Koons received his Bachelor of Science in Biology degree from the University of Texas at Austin. Pat and his wife, Shay, have two daughters and reside in Friendswood.

Bernard Milstein, MD

Dr. Milstein is a pioneer in the field of laser vision correction and has performed more than 15,000 LASIK procedures. He is also at the forefront in the surgical treatment of cataracts. A fellow of the American Academy of Ophthalmology, Dr. Milstein is a past President of the Texas Ophthalmological Association and is a member of the Texas Medical Association and the Galveston County Medical Society.

He is a clinical professor of ophthalmology at the University of Texas Medical Branch and for many years instructed residents in advanced cataract and refractive surgical techniques. Dr. Milstein is involved in countless committees and organizations throughout Bay Area Houston.

Robert Mitchell

Bob Mitchell joined the Bay Area Houston Economic Partnership in 2001 to direct the organization’s Space Alliance Technology Outreach Program. In 2007 he was assigned responsibility for BAHEP’s day-to-day operations and became president in January 2008. As BAHEP president, Mitchell has taken a leadership role in numerous initiatives affecting Bay Area Houston which have included recovery efforts following Hurricane Ike; working to reinstate adequate funding, through the NASA Reauthorization Act, for NASA’s human spaceflight program; meetings that assisted in the passing of the Homeowner Flood Insurance Act, which had a huge impact on the region; and, since 2009, ongoing advocacy to build a coastal spine to protect the upper Texas Gulf Coast from hurricane storm surge. Mitchell believes in giving back to the community and has actively donated his time in many capacities.

In recognition of his work and partnerships on behalf of NASA Johnson Space Center, its many contractor companies and the Houston Airport System, Gov. Greg Abbott appointed Mitchell to the Texas Aerospace and Aviation Advisory Committee where he is currently serving his third term. Mitchell also serves on numerous boards including that of the Clear Lake Regional Medical Center, UTMB Health System Advisory Board, Board of Visitors at Texas A&M University at Galveston, Manned Spaceflight Education Foundation, Inc., HCA Gulf Coast Regional Advisory Board, the Rotary National Award for Space Achievement Board of Advisors, and Gulf Coast Limestone, Inc. Prior to joining BAHEP, key elements of Mitchell’s work experience were gained during 15 years at Grumman Aerospace Corporation. As an executive, he directed all production, process engineering and material operations for the Houston facility of this Fortune 500 company. Mitchell’s background also includes serving as vice president and general manager for two international subsea companies, Unitech and ASEP. Mitchell has three sons and a grandson. In his spare time, he enjoys playing golf

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 University of Utah in Salt Lake City. Dr. Muniz has served on various committees at Clear Lake Regional Hospital as well as Chief of Staff over his tenure on staff.

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, Pulmonary Disease, Critical Care Medicine and Sleep Medicine. He 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. Dr. Nickeson has served 2 terms as President of the Galveston County Medical Society. He is currently serving as Vice Councilor for the Texas Medical Association.

Catherine Potter

Kitty is a CPA and has been with Texas First Bank for more than 30 years, serving as president for 20 years. She was awarded the first Female Banker of the Year award and is now Corporate Secretary and responsible for Corporate Risk Management, Strategic Planning and Regulatory Compliance. She Graduated from LSU in Business and from UHCLC in Accounting and also earned an MBA. Kitty is an inductee of the TCISD Foundation for the Future Hall of Honor. She received the Golden Eagle Award from the Boy Scouts. She also received the Distinguished Service Award for Outstanding Community Service and was later named the Citizen of the Year by the TC-LM Chamber of Commerce. She is active in Rotary, a Multiple Paul Harris Fellow and has received the Rotary Vocational Service Award and was honored with the Rotary Roll Fame. She and her husband, Gary, have three children and live in Texas City.

Eduardo S. Ramirez, M.D.

Dr. Ramirez joined the staff of Clear Lake Regional Medical Center 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. Rakesh Shah is Board Certified in Interventional Cardiology, Cardiovascular Disease and Nuclear Cardiology. He is president of Bay Area Heart PLLC, located at 450 Blossom St. Ste. D in Webster, Tx. Dr. Shah joined the staff of Clear Lake Regional Medical Center in 2003 and has served as Director and Chairman of the Department of Cardiology since 2005. He has been an active member of the Cardiovascular Center of Excellence Committee at Clear Lake Regional Hospital since 2006. Dr. Shah has extensive experience in Interventional Therapies and some of the most complex coronary and peripheral vascular interventions. These include The Watchman, ASD/PFO closure, Trans radial interventions, venous ablation. Dr. Shah completed his Internal Medicine Residency, Cardiology Fellowship and Interventional Cardiology training at the Medical College of Virginia/Virginia Commonwealth University at Richmond, Virginia. Dr. Shah has been married to his wife Poonam for more than 25 years and he has three daughters. Dr. Shah is an avid runner and enjoys participating in marathons. He has been a resident of the Clear Lake area for over 16 years.

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. Prior to opening Tommy’s, Tom spent eighteen 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 Healthcare Committee. Tom is married to Laurian White Tollett, and has three children who were all born at Clear Lake Regional Hospital. He resides in the Clear Lake 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 Clear Lake Regional Medical Center. 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.

Troy Villarreal, President, HCA Gulf Coast Division

Troy A. Villarreal joined HCA Healthcare 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. 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. Villarreal currently serves on the Board of Directors for the Greater Houston Partnership, on the Advisory Board of the University of Houston-Clear Lake, on the Regional Policy Board of the American Hospital Association, and as a Board of Trustee for the Texas Hospital Association. Villarreal 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 and his wife Coleen have four children Carson, Jaxson, Hailey, and Greyson.

Todd Caliva., Chief Executive Officer, HCA Houston Healthcare Clear Lake

Todd Caliva serves as Chief Executive Officer of HCA Houston Healthcare Clear Lake and is regarded in the industry as a consummate healthcare professional. He has more than 24 years of experience, including a decade at the multi-facility level. He has been with HCA in Houston since 1997.

In prior roles, Mr. Caliva served as Chief Executive Officer of HCA-affiliated West Houston Medical Center and East Houston Regional Medical Center and Chief Operating Officer of HCA-affiliated The Woman’s Hospital of Texas. His strategic vision, leadership, compassion and relationship-building skills allowed those facilities to flourish in its staff recruitment, patient and visitor experience, and market presence. I believe our commitment to quality healthcare begins with our employees. If our employees enjoy what they do and are committed to our values, then our patients will get the quality care and service they deserve.

Caliva's robust community involvement includes Chairing the Southeast Texas Regional Advisory Council (SETRAC) Cardiac Care Committee, an organization that is committed to improve the overall care for heart attack patients across the region; serving as the president/chairman of the Educational Foundation of the Southeast Texas Chapter of the American College of Healthcare Executives, as well as currently serving as Regent of the Southeast Texas Chapter; and serving as Chairman of the Board for Bay Area Houston Economic Partnership .

Caliva earned a master’s degree in business administration and a bachelor’s of science in marketing from the University of Houston. He is the proud parent of two daughters, Sophie and Cara.

Tripp Montalbo, Chief Executive Officer, HCA Houston Healthcare Mainland

Tripp Montalbo, CEO, joined HCA’s Houston Healthcare Mainland as its Chief Executive Officer on May 16, 2016. Tripp has over 16 years of healthcare experience and most recently served as the Chief Operating Officer of HCA affiliated Conroe Regional Medical Center. While serving Conroe Regional Medical Center, Montalbo’s leadership and commitment facilitated the pursuit and development of the first level II trauma program in Montgomery County. Prior to joining Conroe Regional Medical Center, Tripp served as St. Joseph Medical Center’s Chief Operating Officer and oversaw the operations of St. Joseph Medical Center’s downtown Houston and Heights hospital locations.

Tripp also held senior management positions at Huntsville Memorial Hospital and HCA affiliated Bayshore Medical Center. Tripp’s community involvement includes his participation in the National and Southeast Texas Chapter of the American College of Healthcare Executives; participation in the Texas Hospital Association where he functioned as a member of the Leadership Development Council; and volunteers as a board member for the Texas City-LaMarque Chamber of Commerce and the Galveston County Health District: United Board of Health. Tripp earned his Bachelor of Arts in Sociology from the University of Texas at Austin, a Master of Business Administration and a Master of Healthcare Administration from the University of Houston – Clear Lake. He was inducted into the Upsilon Phi Delta Honor Society for academic excellence in Healthcare Management and Policy. Tripp and his wife, Gretchen, are the proud parents of two children, Martie and Jackson.