Guthrie Welcomes New Providers

Guthrie is pleased to welcome the following providers who have recently joined the organization:

Gabriel Ologun, MD is a board-certified general surgery physician at Cortland Fisher Avenue and Ithaca with clinical interests in laparoscopic procedures, gastrointestinal pathology, and cutaneous lesions. Dr. Ologun completed his education at State University of New York Upstate Medical University in Syracuse, N.Y., and a residency at Guthrie Robert Packer Hospital in Sayre, Pa. He is currently welcoming new patients. To make an appointment with Dr. Ologun, call 866-GUTHRIE (866-488-4743).

Michael Timar, DO is a board-certified family medicine physician in Troy with clinical interests in primary care services, geriatrics and newborn care. Dr. Timar completed his education at Lake Erie College of Osteopathic Medicine in Erie, Pa., and a residency at University Hospitals St. John Medical Center in Westlake, Ohio. He is currently welcoming new patients. To make an appointment with Dr. Timar, call 866-GUTHRIE (866-488-4743).

Anna Konstas, MD joins the family medicine and Obstetrics/Gynecology teams in Sayre with clinical interests in women’s health, primary care services and obstetrics. Dr. Konstas completed her education at The Commonwealth Medical College/Geisinger Commonwealth School of Medicine in Scranton, Pa., and a residency at Guthrie Robert Packer Hospital in Sayre, Pa. She is currently welcoming new patients. To make an appointment with Dr. Konstas, call 866-GUTHRIE (866-488-4743).

Carmela San Luis, MD is a board-certified, fellowship-trained neurologist at Corning Centerway with clinical interests in neuromuscular conditions, single fiber EMG, and amyotrophic lateral sclerosis. Dr. Luis completed her education at St. Luke’s College of Medicine – William H. Quasha Memorial Medical Center in Quezon City, Philippines, and a residency at University of Mississippi Medical Center in Jackson, Miss. She is currently welcoming new patients. To make an appointment with Dr. Luis, call 866-GUTHRIE (866-488-4743).

Carlos Lopez, MD is a board-certified, fellowship-trained neurologist in Sayre with clinical interests in general neurology and stroke and cerebrovascular disease. Dr. Lopez completed his education at St. Luke’s Medical Center College of Medicine in Quezon City, Philippines, and a residency at SUNY Upstate Medical University in Syracuse, N.Y. He is currently welcoming new patients. To make an appointment with Dr. Lopez, call 866-GUTHRIE (866-488-4743).

Zachary Skabelund, MD joins the dermatology teams at Sayre Desmond Street and Corning Centerway with clinical interests in psoriasis, acne and skin cancer. Dr. Skabelund completed his education and a residency at University of Rochester School of Medicine and Dentistry in Rochester, N.Y. He is currently welcoming new patients. To make an appointment with Dr. Skabelund, call 866-GUTHRIE (866-488-4743).

Peter O’Halloran, MD is a fellowship-trained interventional radiologist at Guthrie Cortland Medical Center, Guthrie Robert Packer Hospital, Sayre and Towanda campuses, Guthrie Troy Community Hospital and Guthrie Corning Hospital with clinical interests in organ and bone biopsy, vertebroplasty, and vascular access and recanalization. Dr. O’Halloran completed his education at Georgetown University School of Medicine in Washington, D.C., and a residency at Mount Auburn Hospital in Cambridge, Mass. He is currently welcoming new patients. To make an appointment with Dr. O’Halloran, call 866-GUTHRIE (866-488-4743).

Michael Miller, DO is a board-certified, fellowship-trained anesthesiologist at Guthrie Cortland Medical Center. Dr. Miller completed his education at New York State College of Osteopathic Medicine in Old Westbury, N.Y., and a residency, internship and fellowship at SUNY Upstate Medical University in Syracuse, N.Y.

Cassian Horoszczak, MD, FRCPC is a fellowship-trained anesthesiologist at Guthrie Cortland Medical Center. Dr. Horoszczak completed his education at St. George’s University School of Medicine in Grenada, West Indies. He completed a residency and internship at State University of New York at Buffalo in Buffalo, N.Y., and a fellowship at University of Rochester in Rochester, N.Y.

Daniel D. Singer, MD is a fellowship-trained emergency medicine physician at Guthrie Robert Packer Hospital and Guthrie Corning Hospital. Dr. Singer completed his education at Sackler School of Medicine, Tel Aviv University in New York, N.Y., and a residency at Stony Brook University in Stony Brook, N.Y.

Elana Hayasaka, MD joins the emergency medicine teams at Guthrie Robert Packer Hospital and Guthrie Corning Hospital. Dr. Hayasaka completed her education at Alpert Medical School of Brown University in Providence, R.I., and a residency at Boston Medical Center/Boston University in Boston, Mass.

Timothy LaFrance, DO joins the emergency medicine teams at Guthrie Robert Packer Hospital and Guthrie Corning Hospital. Dr. LaFrance completed his education at Touro College of Osteopathic Medicine in New York, N.Y., and a residency at Arnot Ogden Medical Center in Elmira, N.Y.

Sumyyah Yousufi, DO, MBA joins the emergency medicine teams at Guthrie Robert Packer Hospital and Guthrie Corning Hospital. She completed her education at Lincoln Memorial University – DeBusk College of Osteopathic Medicine in Harrogate, Tenn., and a residency and internship at Arnot Ogden Medical Center in Elmira, N.Y.

Haoyang Wang, MD is a nocturnal hospitalist at Guthrie Cortland Medical Center. Dr. Wang completed his education at West China School of Medicine, Sichuan University in Chengdu, China, and a residency at St. Elizabeth’s Medical Center in Brighton, Mass.

Marie Cadet-Bouzi, FNP-C joins the family medicine and walk-in care teams at Corning Centerway Walk-In Care. Dr. Cadet-Bouzi completed her education at Binghamton University in Binghamton, N.Y., and is certified by the American Academy of Nurse Practitioners.

Elizabeth Hotaling, FNP-C is a hospitalist at Guthrie Troy Community Hospital, Guthrie Robert Packer Hospital and Guthrie Robert Packer Hospital, Towanda Campus. Elizabeth completed her education at Duquesne University in Pittsburgh, Pa.

Guthrie is a non-profit integrated health system located in north central Pennsylvania and upstate New York, serving patients from a twelve-county service area. Guthrie is comprised of a research institute, home care/hospice, hospitals in Sayre, Pa., Corning, N.Y., Towanda, Pa., Troy, Pa. and Cortland, N.Y., as well as a multi-specialty group practice of nearly 700 providers offering 47 specialties through a regional office network providing primary and specialty care in 22 communities in Pennsylvania and New York. Guthrie is dedicated to training the next generation of health care leaders, offering seven residencies, three fellowships, and serving as a regional campus for the Geisinger Commonwealth School of Medicine. Guthrie provides a wide range of services and programs to enhance the health and well-being of those it serves.