
Guillermo Villarmarzo, MD, FCAP
Founder and President of HRP Labs |Director of FNA Clinics
Certified by the American Academy of Pathology since October 1984, Dr. Villarmarzo studied medicine at the University of Santiago de Compostela in Coruña, Spain. He completed his Pathology internship at the University of Puerto Rico School of Medicine from October 1, 1974 to September 30, 1975, continuing his residency in pathology at the same institution from October 1, 1975 to June 30. He participated on a special rotation in cytology at Louisville General Hospital in Kentucky under the supervision of Dr. William Christopherson in September, 1977.
He worked as an Instructor of Pathology at the School of Medicine of the University of Puerto Rico in 1977, and served as an assistant professor at the same institution from 1980 to 1986 when he was promoted as Associate Professor for the years 1986 to 1995. In 1995, he served as Professor of Pathology until 2001.
During these years he was the Medical Director of the Department of Pathology of the Administration of Medical Services of Puerto Rico (ASEM) and Director of the School of Cytotechnology. In conjunction with the UPR Hospital and the Municipal Hospital of San Juan, he created the “Fine Needle Aspiration” (FNA) program in the Pathology Department of the University Of Puerto Rico School Of Medicine. He also directs the Tumor Boards of the University Hospital for Adults.
In 1989 he joined Dr. Rafael Ramírez Weiser as a partner in his private practice creating Hato Rey Pathology Associates. In 2001 he began his duties as Director of Laboratory. In December 2007 he became the owner of Hato Rey Pathology Associates, Inc. which has pathology offices and/or laboratories at Hospital del Maestro, HIMA San Pablo Caguas Hospital, Ashford Presbyterian Community Hospital and Damas Hospital in Ponce.