Internal Medicine Residency Faculty

HERMES KOOP, M.D.
Designated Institutional Officer
Hermes Koop, M.D.
Designated Institutional Officer
Dr. Koop has been practicing General Internal Medicine in Naples since 1992. He received his medical degree from the University of Texas Medical Branch in Galveston, Texas and subsequently completed his internship and residency training at the Good Samaritan Medical Center and V.A. Medical Center in Phoenix, Arizona. He has been board certified in Internal Medicine since 1987 and he became board certified in Critical Care Medicine in 1991. After practicing for 5 years near San Antonio, Texas he moved his family to Naples. In Naples he has practiced in both solo and group practice settings. He started his current concierge practice in 2009.
He has been very active and proud of his affiliation with the NCH Healthcare System. For six years he served as President of the Medical Staff and he has also served as Chairman of the Department of Medicine and Chairman of the Credentials Committee. He has recently completed serving on the Board of Trustees for the NCH Healthcare System including being Chairman of the Board Quality and Patient Satisfaction Committee.

TRACY WALSH, M.D.
Associate Program Director
Tracy Walsh, M.D.
Associate Program Director
Dr. Tracy Walsh is a board certified Internal Medicine physician. She earned her undergraduate and medical degrees from the University of Miami. She completed her internal medicine residency at the University of Chicago, where she was recognized as an outstanding teaching resident on the general medicine wards. She is a member of Phi Beta Kappa and the American College of Physicians.
Dr. Walsh's medical interests include preventative medicine and cardiovascular disease. She was raised in Southwest Florida and enjoys watching the Miami Hurricane sports teams in her free time. Like any true Floridian, she also enjoys escaping to the sunny Naples beaches with her family as well.

RICARDO FRANCO-SADUD, M.D.
Associate Program Director
Ricardo Franco-Sadud, M.D.
Associate Program Director
Ricardo Franco-Sadud, M.D. joined the NCH team in 2017 as an Academic Hospitalist. He came to NCH from the Medical College of Wisconsin, where he successfully established a Bedside Procedure Service that rapidly expanded in scope and volume of procedures, performing procedures for internal medicine, hematology/oncology, cardiology and transplant surgery. He imported this concept from Cook County Hospital in Chicago, Illinois, where his procedure service performed common bedside procedures and was expanded to include bedside core-needle biopsies of lymph nodes and insertion of tunneled catheters under fluoroscopy. He also participated in the only hospitalist study to assess the impact of hand carried ultrasound on the care of patients with chest pain at Cook County Hospital.
Dr. Franco-Sadud’s expertise in bedside ultrasound is now being used at NCH to train Internal Medicine residents on common bedside procedures and Point of Care ultrasound (POCUS) for bedside diagnosis and therapeutic decisions.
As a dedicated educator, Dr. Franco-Sadud has, since 2010, participated in many national and local continuing medical educations events to teach applications of portable ultrasound, including the Society of Hospital Medicine’s “Point-of-Care Ultrasound for the Hospitalist” pre-course.

DOUGLAS W. HARRINGTON, D.O.
Associate Program Director
Douglas W. Harrington, D.O., FCCP
Associate Program Director
Dr. Harrington is a pulmonary critical care physician, formal training at Henry Ford Hospital in Detroit, where he completed internal medicine residency, chief medical resident year, and a pulmonary critical care fellowship. Subsequently practiced and taught at MGCH, a teaching institution in Michigan. Dr. Harrington relocated from Michigan to Naples Florida in 2003. Dr. Harrington is an Associate Program Director of the Internal Medicine Residency program. Actively involved in the initiation and establishment of the internal medicine residency at NCH. Dr. Harrington has received numerous teaching awards, while training at Henry Ford Hospital in Detroit Michigan, subsequently while at MCGH in Michigan and subsequently at NCH. Dr. Harrington recently completed a year-long sabbatical/fellowship at Mayo Clinic in simulation medicine. Dr. Harrington is presently leading the initiative to establish a state-of-the-art multidisciplinary simulation center at NCH which will be an integral part in the internal medicine resident education. Dr. Harrington holds academic appointments at Mayo Clinic as an adjunct Assistant Professor of medicine and at University Central Florida as associate Professor of medicine.
Dr. Harrington's focus of medical education is patient and learner centered with concentration on bedside rounds, echo skills, critical thinking and applying evidence base medicine with physiological understanding to improve outcomes.
Core Faculty

CARLOS AGUIRRE, M.D.

ALIMER GONZALEZ, M.D.

BRIAN PULFORD, M.D.

Rebecca Witherell, M.D.
Academic Hospitalists

Ammar Abu Sulb, M.D.

CARLOS AGUIRRE, M.D.

Madeline Deutsch, M.D.

RICARDO FRANCO-SADUD, M.D.

ALIMER GONZALEZ, M.D.

BRIAN PULFORD, M.D.

CARLOS QUINTERO, M.D.

Aleatha Reitsma-Mathia, M.D.

Courtney Roberts, M.D.
Subspecialty Education Coordinators

CARLOS QUINTERO, M.D.
Academic Hospitalist Medical

Florina Neagu, M.D.
Allergy/Immunology

TRACY WALSH, M.D.
Ambulatory Medicine

Viviana Navas, M.D.
Cardiology

Shona Velamakanni, M.D.
Cardiology NHI

Hashem Azad, D.O.
Cardiology SWIFCT

SAJAN RAO, M.D.
Cardiology SWIFCT

DOUGLAS W. HARRINGTON, D.O.
Critical Care

Anne Marie Tremaine, M.D.
Dermatology

DANIEL WASSERMAN, M.D.
Dermatology

Vivian Wong, M.D.
Dermatology

JEFFREY PANOZZO, D.O.
Emergency Medicine

Valeriu Neagu, M.D.
Endocrinology

William Provance, M.D.
Gastroenterology

Ron Garry, M.D.
Geriatrics

Ruben Contreras, M.D.
Geriatrics

MICHELE RAMIREZ, M.D.
Hematology/Oncology

REBECCA SMITH, M.D.
Hospice

Mark Rasnake, M.D.
Infectious Disease

REBECCA WITHERALL, M.D.
Infectious Disease

RICARDO FRANCO - SADUD, M.D.
Inpatient Medicine

GREGORY RUBIN, D.O.
Medical Orthopedics Sports Medicine

Matthew Baker, M.D.
Neurology

William Justiz, M.D.
Neurology

Brett Mercer, D.O.
Neurology

PRAHLAD SUNIL, M.D.
Night Medicine

STEVEN SCHWARTZ, M.D.
Ophthalmology

Elizabeth Brawner, M.D.
Palliative Care

Ryan Perdzock, M.D.
Palliative Care

DAMIAN MCGOVERN, M.D.
Psychiatry

DAVID LINDNER, D.O.
Pulmonology

SCOTT PETERSON, M.D.
Radiology

GREGORY POLAND, M.D.
Research

Marielys Figueroa Sierra, M.D.

HERMES KOOP, M.D.
Rotation X
ICU Faculty

Howard Cohen, M.D.

DOUGLAS W. HARRINGTON, D.O.

DAVID LINDNER, D.O.

JOSE VALLE, M.D.

CARL RUTHMAN, M.D.
Continuity Clinic

JAMES BERNENE, M.D.

JEFFREY HOWLAND, M.D.

GREGORY RUBIN, M.D.

MARK SPEAKE, M.D.

TRACY WALSH, M.D.
Scholarly Activity Faculty

DAVID LINDNER, D.O.

DAVID LINZ, M.D.
