Assistant Professor – UPR, Medical Sciences Campus, 2013-present

Geriatrics Division Interim Chief – UPR, Medical Sciences Campus, 2019-present

Internal Medicine Assistant Program Director- Quality and Patient Safety, UPR, Medical Sciences Campus, 2020-present

OTHER APPOINTMENT:

Internal Medicine Key Faculty, 2018-present

President of Internal Medicine Residence Program Admissions Committee, 2020-present

Quality: Inpatient delirium prevention protocol, 2021-present

Quality: Enforcement of a rapid response protocol, 2020-22

Quality: Transitions from OR to ward, 2021-present

Quality: Central line associated blood stream infections, 2020-present

Quality: Venous thromboembolism prophylaxis, 2021-present

Quality: Hands off standardization, 2021-present

Quality: Transitions of care from inpatient to outpatient setting, 2020-22

Health maintenance and vaccination status in inflammatory bowel disease population in Puerto Rico, 2010-12

Record review for the study of serological markers of viral hepatitis in liver transplant patients, 2008-10

Ortiz JG, Rassi N, et al. Commercial valerian interactions with [3H] Flunitrazepam and [3H] MK-801 b i n d i n g t o r a t s y n a p t i c membranes, 2002-06

Hernandez-Suarez DF, Rodriguez Ruiz C, Malave Sanchez M, Mirabal Arroyo JE, Colon Marquez JS, Jimenez Velazquez IZ, Rassi Stella N, Febles Negron A, Lopez Andales A. Adapt and Evolve: How our Internal Medicine Residency changed in Hurricane Maria. Puerto Rico Health Sciences Journal. Volume 37, number 1, March 2018 2.

 Ortiz JG, Rassi N, et al. Commercial valerian interactions with [3H] Flunitrazepam and [3H] MK-801 binding to rat synaptic membranes. Phytotherapy Res. 2006 Sept; 20(9):794-8. PMID:16819753.