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APPOINTMENTS:  CALL 633-4IHP (4447)

Our Providers

Larry Lizama, M.D.

Specialty: Internal Medicine

Dr. Lizama is board certified in internal medicine and has served the community on Guam for many years.  He attended the University of Washington Medical School in Seattle, Washington and also obtained his residency at the University of Washington.   Dr. Lizama currently serves as the Medical Director of International Health Providers, LLC.

Randolph Leon Guerrero, M.D.

Specialty: Internal Medicine

Dr. Leon Guerrero attended the University of Southern California Keck School of Medicine.  He completed his residency in Internal Medicine at St. Mary’s Medical Center in Long Beach, California.

Ricardo Terlaje, M.D.

Specialty: Family Medicine

Dr. Ricardo Terlaje is a family medicine physician with over 20 years of experience. He attended the Autonoma University Medical School in Guadalajara, Mexico.  He completed his residency in Family Medicine at the Medical College of Wisconsin.

Akio Oiso, M.D., FAAP

Specialty: Pediactrics

Dr. Oiso attended Loma Linda University, School of Health in Loma Linda, California.  He also attended Ross University, School of Medicine in the Commonwealth of Dominica, West Indies.  He completed his pediatric residency with the Lutheran General Children’s Hospital in Park Ridge, Illinois. He is a general practitioner and is a board certified Pediatrician with the American Board of Pediatrics.

April Esteba, MD

Specialty: Family Medicine and Women’s Health


Dr. April Esteba is a Family Practice Physician with special interest in women’s health. She attended Creighton University school of Medicine in Omaha, Nebraska. She completed her residency at Central Washington Family Medicine in Yakima, Washington. She is Board Certified with the American Board of Family Medicine.

Luis Cruz, MD

Specialty: Family Medicine and Sports Medicine

Dr. Luis Cruz is an experienced, board certified physician providing care of sports related injuries and orthopaedic conditions.  He is fellowship trained in Primary Care Sports Medicine from the University of Arizona where he also completed his residency.  Dr. Cruz attended medical school at the University of Hawaii, John A. Burns School of Medicine.

Sarah Mina, D.P.M.

Specialty: Podiatry

Dr. Sara Mina is an extensively trained physician who specializes in reconstructive foot and ankle surgery, foot and ankle trauma, diabetic limb salvage, sports medicine, pediatrics, dermatology, and wound care. Dr. Mina received her medical education at Kent State College of Podiatric Medicine in Cleveland, OH. and completed her surgical training at St. John Providence Hospital in Southfield, MI. She is board certified with the National Board of Podiatric Medicine

Wilfredo Granada, M.D.

Specialty: Internal Medicine

Dr.Granada is board certified in Internal Medicine. He attended Far Eastern University in Manila.He completed his internship and residency at Illinois Masonic Medical center in Chicago, Illinois.

Caroline Marie L. Aventura, MD

Specialty: Family Practice

Dr. Caroline Aventura is an experienced, board certified Family Practice physician. Dr. Aventura attended medical school at University of Santo Tomas Philippines, Manila. She completed her residency at Michigan State University Grand Rapids, Michigan. She has 10 years of experience as a Family Practice physician.

Mark Anderson, M.D.

Specialty: Family Practice

As a family medicine physician and urgent care provider, Dr Anderson specializes in providing quality, prompt care to patients of all ages and offers convenient hours to ensure even the busiest people can receive the care they need.  He completed his medical eduation at the American University of the Caribbean School of Medicine and his family medicine residency at Marquette General Hospital in Michigan.

Delores J. U. Lee, M.D.

Specialty: Family Practice

Dr. Delores Lee is a Board Certified Family Medicine Physician. She recieved her Bachelor Degree of Science, Biology at Gonzaga University Spokane, Washington. She completed her Doctor of Medicine and Residency program at University of Hawaii, Manoa John A. Burns School of Medicine.  

Lilli Ann Perez, PhD

Specialty: Behavioral Health

Dr.Lilli Ann is a Licensed Therapist. She attended University Of Guam and has her Bachelor Degree of Social Work.She holds a Master's Degree of Human Relations from University of Oklahoma.She completed her Doctorate Degree in Phyilosophy Graduate School or Social Work & Social Research from Bryn Mawr College, Pennsylvania.

Dr. Lilli Ann is licensed as a Marriage & Family Therapist, Mental Health Counselor, Professional Counselor, Clinical Social Worker, Registered Play Therapist. She also offers screening testing for children with Autism Spectrum Disorder as young as 18 months.