Jeffrey S. Overcash, MD practices emergency medicine at Sharp Grossmont Hospital on Grossmont Center Drive in La Mesa's Grossmont medical corridor, board-certified by the American Board of Emergency Medicine. The physician's clinical research portfolio includes published trials in The New England Journal of Medicine on single-dose oritavancin for acute bacterial skin infections, contributing to the evidence base that informs post-discharge neurological and rehabilitation planning at campus providers like NeuroRestorative. A University of North Carolina at Chapel Hill School of Medicine graduate (2001) with emergency medicine residency at UNC Hospitals (2001–2004), the physician holds NPI 1104814680 and additional affiliation with Sharp Chula Vista Medical Center and Velocity Clinical Research. Emergency department encounters span acute myocardial infarction under the facility's STEMI-center protocols, stroke triage through its designated stroke-center pathway, and trauma stabilization — cases requiring psychiatric crisis evaluation route through the behavioral health continuum at BrightQuest Treatment Centers in La Mesa. Active clinical trial participation includes Phase III antimicrobial efficacy studies, COVID-19 vaccine booster investigations, and sepsis biomarker detection using PCR/electrospray ionization-mass spectrometry on whole blood samples.