About Us

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Established on April 8, 2024, in Rosario, Pasig City, Serenus Sleep Center Inc. is a healthcare institution dedicated to diagnosing and managing sleep disorders. 

Founded by a collaborative team of expert physicians and visionary businessmen, we recognized the critical need for specialized sleep healthcare in our community. 

At Serenus, we bridge the gap between advanced sleep science and personalized patient care. 

Our serene and advanced facility is a sanctuary where individuals find comprehensive and tailored solutions to their sleep problems, enhancing their overall health and quality of life.

We are committed to: 

  • Providing high-quality, compassionate, and patient-centered care 
  • Offering efficient, reliable, and congenial services in sleep disorder detection and management
  • Ensuring the highest level of customer satisfaction 
  • Valuing all stakeholders, including patients, incorporators, investors, suppliers, sleep specialists, and employees 

Our holistic approach and dedication to excellence position us to achieve our vision of becoming the leading sleep health center in Pasig City and surrounding areas by 2029. 



Serenus Sleep Center: Where Quality Sleep Meets Expert Care

Vision

By 2029, to be the leading sleep health center in Pasig City and surrounding areas, recognized for excellence in diagnosing and treating sleep disorders, and improving our patients’ overall quality of life..

Mission

We are dedicated to helping our patients achieve optimal sleep quality and enhance their vitality and well-being through evidence-based care, patient-centered support, and innovative approaches to sleep disorders.

Our Team

Doc Panugayan

Dr. Ronald Sapaula Santos is a seasoned interventional cardiologist and healthcare leader with over two decades of experience in patient care and medical management. A proud alumnus of the University of Santo Tomas, Dr. Santos earned his Doctor of Medicine degree after completing his BS in Medical Technology at the same institution. 

Following his internal medicine residency at Manila Doctors Hospital, Dr. Santos pursued fellowship training in Cardiology and Interventional Cardiology at the University of the Philippines. His 17-year tenure as an Interventional Cardiologist at Manila Doctors Hospital underscores his commitment to providing top-tier cardiovascular care. 

Currently serving as the Medical Director of MerciHub Multispecialty & Diagnostic Clinic and the Chairman of the Department of Internal Medicine at Pasig City General Hospital, Dr. Santos brings a wealth of clinical and administrative expertise to our team. His entrepreneurial spirit is evident in his role as President and CEO of Serenus Sleep Center Inc. 

When not revolutionizing healthcare services, Dr. Santos enjoys staying active through walking exercises, indulging his love for travel with his family, and exploring new cultures and perspectives that inform his holistic approach to patient care.



Ronald Sapaula Santos, MD, FPCP, FPCC, FPSIC, 

MBAH President and CEO

Doc Ron 2

Dr. Santos’ commitment to continuous learning and professional growth is evident in his pursuit of an MBA in Health from Ateneo de Manila University. This unique combination of medical expertise and business acumen, combined with his dedication to learning, allows him to navigate the complex healthcare landscape effectively. 

Dr. Sarah Santos is a General Pediatrician with 19 years of experience at SAA Healthcare Out-Patient Clinic in Pasig City. 

She holds positions at Mission Hospital and Rizal Medical Center, where she serves as Department Executive Secretary and Head of the Professional Services Committee. Dr. Santos is a Fellow of the Philippine Pediatric Society and a member of the Philippine Medical Association and Pasig City Medical Society. 

She completed her Pediatric Residency at UP-Philippine General Hospital and earned her MD from the University of Santo Tomas. Dr. Santos obtained her MBA in Health from the Ateneo Graduate School of Business in 2022. 

Her academic career includes professorships at Emilio Aguinaldo College’s School of Medicine and Arellano University’s College of Nursing. She also holds corporate roles as Secretary at Merci Cardiovascular Clinic Inc. and Financial Officer at Merci Property Management Corporation. 

Colleagues and patients affectionately know Dr. Santos as “Tita Doc.”



Sarah Claudine S. Santos, MD, FPPS,

MBAH Chief Operating Officer

She completed her Pediatric Residency at UP-Philippine General Hospital and earned her MD from the University of Santo Tomas. 

Dr. Krislyn Gabinete Panugayan is a skilled sleep medicine specialist dedicated to improving patients’ quality of life. A graduate of the University of Santo Tomas Medical School, Dr. Panugayan completed her residency and fellowship training in Internal Medicine and Pulmonary Medicine at Manila Doctors Hospital. Her commitment to sleep health led her to complete a fellowship in Sleep Medicine at the Lung Center of the Philippines in 2023. 

As a board-certified sleep medicine specialist and Fellow of the Philippine College of Chest Physicians, Dr. Panugayan brings knowledge to Serenus. Her research on obstructive sleep apnea, presented at international conferences, is a testament to her expertise. Dr. Panugayan’s understanding of complex sleep disorders and their relationship with cardiovascular health is further demonstrated by her study on sleep apnea among heart failure patients. 

As a visiting consultant at Manila Doctors Hospital, Chinese General Hospital, & Delos Santos Medical Center, and an active consultant at Medical Center in Manila, Dr. Panugayan is actively involved in clinical practice and ongoing research. Her ability to diagnose and treat various respiratory and sleep-related conditions makes her an invaluable asset to our team. When not helping patients achieve restful sleep, 

Dr. Panugayan enjoys swimming and indulging in her favorite chocolate-flavored ice cream



Krislyn Gabinete Panugayan, M.D. Sleep Specialist

As a board-certified sleep medicine specialist and Fellow of the Philippine College of Chest Physicians, Dr. Panugayan brings knowledge to Serenus. 

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