Dr. Subbu Nagappan is a California-licensed general surgeon with long-standing clinical experience in general, vascular, and trauma surgery. He has practiced as a General, Vascular & Trauma Surgeon at Riverside Community Hospital since 1991. His background includes extensive involvement in hospital peer review and performance improvement, along with leadership roles supporting surgical quality, peri-operative efficiency, and trauma system operations.

From 1989 to 1991, Dr. Nagappan served as an Attending General, Vascular & Trauma Surgeon at Maricopa Medical Center. He completed a General Surgery Residency at Maricopa Medical Center from 1983 to 1989. His residency training included broad exposure across surgical fields and critical care, with special concentration in general, vascular, and trauma surgery. Dr. Nagappan earned his medical degree from the University of Illinois (1979–1983) and completed undergraduate studies at the University of Illinois, earning a B.S. in Biology with a minor in Chemistry (1976–1979).

Dr. Nagappan holds a California medical license (G70352). He is board certified in General Surgery, with certifications listed in 1990, 2000, and 2010; his recertification is noted as expiring in 2020. He also holds Advanced Trauma Life Support (ATLS) certification.

In addition to his clinical surgical work, Dr. Nagappan served as Trauma Medical Director from 2003 to 2016 at a Level 2 Trauma Center, where he was responsible for running the trauma service, developing protocols based on clinical evidence, and supporting peer review and performance improvement processes. He served as President of the Medical Staff at Riverside Community Hospital from 2017 to 2019 and as Chairman of the Department of Surgery from 2009 to 2017, following service as Section Chair in the Department of Surgery from 2006 to 2009. He also participated on the Surgical Quality Care Committee (2003–2009), including review of surgical mortality and morbidity, and has been a member of the Peri-Operative Surgical Committee since 2009, developing protocols to increase operating room efficiencies.