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Shauna Lorenzo-Rivero, MD, FACS, FASCRS

Dr. Lorenzo, board certified through the American Board of Surgery (ABS) and American Board of Colorectal Surgery (ABCRS), specializes in general and colon and rectal surgery. Dr. Lorenzo joined University Surgical Associates in 2008.

Dr. Lorenzo has office hours at USA's Surgical Specialties Building on Tuesday (8:10-11:30 am and 1-3:30 pm), Thursday (8:30-11:30 am * except the 2nd Thursday * and 1-3:30 pm on the first, third, fourth, and fifth Thursday), and Friday (8-11:30 am and 12:30-4 pm on the second and fourth Friday) and at USA's Gunbarrel office on Friday (8:30-noon and 1-5 pm). Dr. Lorenzo performs surgery at Erlanger Hospital, CHI Memorial Hospital, Parkridge and Parkridge East Hospitals.

Dr. Lorenzo is an associate professor of surgery, Department of Surgery, for the University of Tennessee College of Medicine, Chattanooga, a fellow of the American College of Surgeons (FACS) and American Society of Colon & Rectal Surgeons (FASCRS).

She founded the Greater Chattanooga Colon Cancer Foundation ( to educate Chattanoogans on the importance of colon cancer screening and raise funds for those who cannot afford it through the Rump Run (

Dr. Lorenzo has served as president of the Hamilton County Medical Society in 2017.

Nurse: Sally Woodward, BSN - RN 
Contact: (423) 493-2328


Dartmouth College
Hanover, NH
A.B., Summa Cum Laude 
1991 – 1995
National Hispanic Scholar, 1991

Washington University
  School of Medicine
St. Louis, MO
Medical Degree
1995 – 1999

General Surgery
Univ. of Iowa Hospitals and Clinics
Iowa City, IA
1999 – 2004

Colorectal Surgery
Ferguson Clinic
Grand Rapids, MI
2004 – 2005

Academic Appointments

2008 – 2013
Assistant Professor of Surgery
2013 - Present

Associate Professor of Surgery
UT College of Medicine
Department of Surgery
Chattanooga, TN


American Board of Surgery, 2005, Recert. 2015
American Board of Colon & Rectal Surgery, 2007, Recert. 2016
Fellow, American College of Surgeons, 2007
Medical License – Tennessee, 2008
Transanal Endoscopic Microsurgery, 2007
Stapled Transrectal Resection, 2009
Fellow, American College of Colon & Rectal Surgery, 2010
Robotic Surgery, 2010
TAMIS, 2016

Professional Organizations: Chattanooga Hamilton County Medical Society (President 2017); American Society of Colon and Rectal Surgeons, 2004–present; American College of Surgeons, 1999–present; Association of Women Surgeons, 1998–present; Tennessee Medical Association, 2008–present; Crohn's & Colitis Foundation (CCFA); Greater Chattanooga Colon Cancer Foundation (
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