About us

Juan is a board certified internal medicine physician with broad leadership and management experience in clinic operations, medical cost, quality management and hospital medicine.

Juan completed medical school in Bogota, Colombia, and his internship and residency training in Internal Medicine at Yale University—Saint Raphael Campus in New Haven, CT, where he earned several honors and awards in academic performance and research. After serving as an Acute Care Hospitalist at Philadelphia-based Cogent Healthcare, he moved to the Miami in a similar role with IPC Healthcare. His subsequent work there, included overseeing Family Practice and Internal Medicine physicians, and helping expand IPC’s footprint in the south Florida market.

Prior to becoming the CEO of Sanitas Florida, Juan was part of the core team that started the Sanitas expansion in the United States successfully adapting its core clinical model to the needs of the Florida, Connecticut and New Jersey markets. Juan is part of a leadership team that has grown Sanitas in the U.S. to serve hundreds of thousands of patients while achieving high patient satisfaction, exceeding quality scores and lowering total cost of care.

As Vice President of Healthcare Services, Carlos has unique medical and management experience. He’s an expert in designing and managing healthcare programs to educate patients and help them manage their conditions for a better quality of life.

Carlos is responsible for all facets of the company’s clinical operations including the expansion of new locations as well as the design, development and implementation of clinical guidelines to ensure safety, quality and efficiency objectives are incorporated into the clinical workflow and patient experience.

Before joining Sanitas Medical Centers in the US, Carlos served as general manager for the Sanitas division of Organización Sanitas Internacional, in Colombia. In his earlier role he was responsible for building and managing outpatient medical clinics that serve adults and children. He also created successful healthcare programs to teach patients how to avoid chronic illnesses and how to manage ongoing health conditions.

Carlos completed his medical and surgical training at Javeriana University of Bogotá and was trained in Clinical Epidemiology at Bogotá Health Studies Center (CES) and Libre University of Cali. He also holds an MBA and a degree in Health Services Quality Management.

As the regional medical director for Sanitas, Raul serves as the clinical leader for the organization. He’s responsible for recruiting and developing a high performing team of physicians and clinicians across the entire Sanitas network in the United States. In addition, he works closely with the leadership team to implement strategies that enhance patient care including quality assurance, protocol and care guidelines development, cost management and patient engagement.

Raul was born and raised in Bogota, Colombia, where he attended medical school. In 2001, Raul moved to the United States to complete his Internal Medicine residency at St. Luke’s-Roosevelt Hospital System, a Columbia University affiliated program, in New York. He is board certified by the American Board of Internal Medicine. Raul started as an internal medicine doctor at Sanitas and soon after became the medical director for one of the fastest growing locations within the Sanitas network. Before joining Sanitas, Raul worked at IPC Healthcare in Miami as a hospitalist assuming more administrative and leadership functions related to quality, credentialing and integration to Hospital systems. He served in the medical executive committee for internal medicine at Memorial Hospital Miramar

Lina is responsible for Sanitas’ operations at a national level. In addition, to managing day-to-day operations, Lina designs and implements innovative strategies and action plans to improve the quality of patient care and serve the community where the medical centers are located.

Born in Bogotá, Colombia, Lina moved to the United States in 2002, inspired by her desire of joining the healthcare industry in this country. She obtained her Bachelor's degree in Health Services Administration with a minor in Public Health from Miami, FL International University, where she earned a place on the Dean’s list for three consecutive semesters and graduated with honors. She also is a certified professional coder by the AAPC

Lina completed her Masters degree in Business Administration with a Management concentration from the University of Miami, FL and became an Associate Director of Physician Services for Jackson Health System. Her career has also included hospital-based assignments as a practice manager, office supervisor and billing liaison.

As the CEO of Sanitas Tennessee, Peter G. Santostefano provides strategic leadership and management for all areas of Sanitas.

Peter has over 30 years of experience in administration within the healthcare delivery system. He has a unique ability to lead the transformation of business intelligence into actionable operations and unique clinical programs.  Peter cultivates strong relationships internally and externally with the goal of strengthening the entire Sanitas organization.  Strategic relationships and transparent communication are important to him in every position he has held.

Peter completed his bachelor’s degree in Psychology at Providence College in Rhode Island, where he also went on to obtain an MBA. He obtained second and third master’s degrees from Boston College in both Psychology and Social Work and healthcare administration. His studies fueled his passion for working in the healthcare industry and to provide unique insights into the complex problems within the healthcare industry. 

In his past, Peter has been the Co-Director of the Clinical Issues Committee, NASW of Rhode Island; and an ex-officio member of the Board of Directors of the Behavioral Health and Medicine Executive Council at Brown University Medical school.  

As the Tennessee Regional Medical Director for Sanitas, Cortney serves as the clinical leader for the organization. She is responsible for recruiting and developing a high performing team of physicians and clinicians across the state of Tennessee. In addition, she works closely with the leadership team to implement strategies that enhance patient care including quality assurance, protocol and care guidelines development, cost management and patient engagement.

Cortney was born in Rock Cave, West Virginia, where she attended medical school at the West Virginia School of Osteopathic Medicine . She completed her residency at the Washington Health System Family Medicine Residency.  She is board certified by the American Board of Family Medicine. 

Dr. Gubbels comes to Sanitas with over 25 years of experience in Physician Leadership positions. As the Texas Market Medical Director, Dr. Gubbels is responsible for maintaining Sanitas’ high standards of care at a patient-level while also working closely with key players in insurance, hospitals, and the community. In this new role, Dr. Gubbels will help enhance Sanitas’ community-based healthcare approach and improve transparency and efficiency at all levels of the organization. 

In the past, Dr. Gubbels has served as a lead physician with the City of Houston as well as the Medical Director for Wharton EMS, a Public Health Officer for the City of Wharton, and the Wharton County Health Authority. He also practiced full time as an OB/GYN with a large practice. This hands-on experience at all levels of a medical facility will enable him to establish new protocols and manage the existing Health Information Management system to provide the best personalized, problem-oriented care possible.  

Dr. Gubbels has a long track record of success in leadership positions, overseeing numerous acquisitions, including the merger of South Texas Medical Clinics into Memorial Hermann Medical Group. He has also served as a Regional Medical Director, Senior Director Medical Operations, Associate Vice President, Vice President Medical Operations, Interim CEO, and Chief Medical Officer. 

With extensive training in both the medical and business fields, Iván directs clinical policies in all US markets to be sure they meet the medical needs of the patients we serve in each area. He serves as a medical liaison, sharing best practices and helping to design company policies that support the health of our patient populations in the communities where they live.

Before joining Sanitas USA, Iván designed and implemented business development plans from a health care perspective for our parent company, Organización Sanitas International (OSI). Based in Columbia, he managed projects in South and Central America, Europe, Asia and throughout the world.

Iván received his MD degree and completed his residency in Colombia and earned subsequent degrees in quality management with emphasis on epidemiological analysis and health care organization management. He earned his master’s degree in health care administration from the University of Barcelona, Spain.

Alberto leads the company’s expansion into the US market. His career, spanning more than a quarter-century, has focused on creating value and benefits through joint ventures, strategic alliances, and new market entries. With his formal training and hands-on experience in multi-country and multi-region negotiations, he specializes in producing results in culturally diverse environments. 

Prior to joining the Sanitas International Organization, Alberto has held positions of regional and global responsibility, including the establishment of new retail networks at a top-10 company on the Fortune 500 list and as director of acquisitions at the world’s largest secondary mortgage company. He has also consulted and advised strategic alliances involving multinational companies in the energy, chemical and telecom industries, as well as multiple agencies within the US federal government. 

Alberto received his engineering degree from the Pontificia Universidad Javeriana, in Colombia and MBAs Los Andes University in Colombia and The George Washington University in Washington DC. 

With an MBA and a degree in industrial engineering, Johanna serves as Vice President of Operations and Information Technology with Keralty, the parent company of Sanitas USA. She develops models and strategies for keeping operations running smoothly at all Sanitas Medical Centers, manages the flow of secure medical data, helps develop new products and services, and manages projects for the company’s strategic planning division. 

Other key elements in her wheelhouse include user satisfaction, employee wellbeing, and helping to implement the opening of new centers. 

Previously, Johanna served as Keralty’s Global Director of Product and Service Design, where she researched health-related needs and opportunities, contributing significantly to the company’s growth and expansion; her responsibilities included ensuring that patients receive high-quality care consistently across locations. She has also served as Operations Director and Director of Process Engineering for Clínica Colsanitas S.A., the precursor of Keralty. 

Johanna received her MBA from the Universidad Externado de Colombia, Bogotá, in 2009 and studied Industrial Engineering at the Escuela Colombiana de Ingeniería, Bogotá. in 2001. She earned her Green Belt certification from Lean Six Sigma in 2012.

As the Director of Patient Experience for Sanitas, Adrianna Sperkacz brings extensive experience to the organization. She is an expert in Patient Experience and is known for her passion in user-centered solutions. 

Adrianna is responsible for leading, executing, implementing, and evaluating Sanitas targeted patient experience and improvement initiatives.

Before joining Sanitas Medical Centers in the US, Adrianna built and led the Patient Experience effort for a large Academic Health Center and Digital Health Vendor.  She is known for her integrity, credibility, and passion and has earned numerous awards for her contributions such as Rookie of the Year, UShine Awards, and a National Excellence & Leadership award.

Adrianna completed her Bachelor’s in Supervision and Management and Executive Healthcare Leadership at Cornell University.  She also holds numerous Sigma certifications and other management and service training titles such as ‘Crucial Conversations’.