Our Story

Our Story

About Us


OPAT.PH is the leading healthcare facility in the Philippines providing excellent treatment of infectious diseases and offering expert delivery of intravenous antimicrobials and other infusion medications in the outpatient setting.

Mission Statement

It is our commitment to provide outstanding patient care in the field of infectious diseases through appropriate and exemplary intravenous antimicrobial treatment of patients, offering a better, safe, and cost-effective alternative, other than hospitalization, using the elastomeric pump or in-clinic infusion, ensuring excellent treatment outcome. We work together with other physicians, medical professionals, and health care providers in providing infusion treatments to patients in need in a facility well-equipped with leading edge medical technology and highly trained staff.


Excellence – We deliver only the best quality care to our patients keeping in heart and mind their needs and overall well-being. We take ownership for our actions knowing that we perform our duties and responsibilities to the best of our abilities and keeping in mind what is right and good for our patients.

Integrity – We value honesty and are aware of our accountabilities. We exercise respect for our company, for our co-workers and our patients.

Teamwork – We have, each of us, our unique strengths and talents. And together, with respect and trust for each other, we are able to achieve excellence in all that we do.

Respect – We practice fairness and take into great consideration the value of each one especially our patients leading to best practices and very good outcomes.

Compassion – We understand the situation of each one and show kindness and care towards those who need it most.

Effectiveness and Efficiency – We perform our tasks in the most optimal and best way possible achieving only outstanding results both for patients and our company.

Stewardship – We observe the importance of everyone and everything entrusted to us taking into account their best interest.

At OPAT.PH, our priority is to ensure that our patients get only the best-quality experience while under the supervision of our highly-trained multidisciplinary medical team.

The Team

OPAT.PH is led by an Infectious Disease Specialist who acquired years of OPAT experience abroad together with qualified and knowledgeable Nurses and Pharmacists.


For over 15 years, Dr. Ryan, an Infectious Diseases specialist passionately trained to deal with infectious diseases in order to continuously provide his patients a good quality of life.

He finished his degree in Internal Medicine at the University of the East Ramon Magsaysay Memorial Medical Center (UERMMMC). He began his training in Infectious Diseases at St. Luke’s Medical Center in the Philippines, then at Tan Tock Seng Hospital (TTSH) in Singapore. He worked at the Institute of Infectious Disease and Epidemiology (IIDE), formerly the Communicable Diseases Centre (CDC), where he acquired his knowledge in outpatient parenteral antibiotic therapy (OPAT) and was an OPAT Physician for several years.

Aside from general infectious diseases and OPAT experience, Dr. Ryan received training and work exposure in the fields of HIV Medicine, Travel Medicine and Vaccination, Antimicrobial Stewardship and Infection Control.

Dr. Ryan is currently a practicing ID consultant at St. Luke’s Medical Center Quezon City and Bonifacio Global City and Cardinal Santos Medical Center.


“OPAT allows patients to receive the right antibiotic for the treatment of their serious infections that would not have been possible due to the high costs of prolonged hospitalization. A patient can continue his antibiotic therapy in the comfort of his home, in the presence of his loved ones and remain productive without compromising the successful outcome of his medical care.”

List of doctors

Ryan M. Llorin, MD, FPCP, FPSMID
Internal Medicine – Infectious Diseases

Jenny Mae Quinivista-Yoon, MD, FPCP, DPSMID
Internal Medicine – Infectious Diseases

Internal Medicine – Infectious Diseases

Janella M. Tiu, MD, DPPS, DPIDSP
Pediatrics – Infectious Diseases

Anthea G. Tan, MD, FPCP, DPRA
Internal Medicine – Rheumatology

Jose Mara G. Mendieta, MD, FPCP, DPCHTM
Internal Medicine – Hematology

Aryane O’S Bea, RN, MD, DPPS

Candy S. Estrada, MD, FPDS

Melvin A. Pasay, MD, MBA, FPCP, FPCCP
Internal Medicine – Pulmonology

Marianne Baltazar-Libiran, MD, FPNA


The practice of administering intravenous antimicrobial therapy in the home or in an alternative health care setting was first described in the United States in 1974 by Rucker and Harrison for the treatment of chronic lung infections in children with cystic fibrosis. Since then, the practice has expanded worldwide to Canada, United Kingdom, Australia, New Zealand, Japan and Singapore, with clinical evidence supporting its safety and cost-effectiveness.

Opat Practices Around The World

Copyright 2019-2023 OPAT.PH – The Antibiotic Care Specialist. All rights reserved.