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Adrian E. Ortega, MD
Associate Professor of Clinical Surgery
GNH 10900 Off Campus Los Angeles
+1 323 226 7792


Dr. Ortega graduated from the Harvard Medical School in Boston, MA and completed his surgical training here at the University of Southern California. After a time in private practice, he went on to complete his training in colorectal surgery at USC, then joined the faculty. Dr. Ortega works primarily out of the LAC+USC Medical Center, serving as a mentor, teacher, and supervisor of fellows, residents, and medical students in training.

Dr. Ortega's major areas of research interests include Diverticular disease, Anorectal Conditions, and Colon and Rectal Cancer.


Ortega AE, Cologne KG, Shin J, Lee SW, Ault GT. Treatment-Based Three-Dimensional Classification and Management of Anorectal Infections. World J Surg. 2016 Oct 20. View in: PubMed

Cologne KG, Byers S, Rosen DR, Hwang GS, Ortega AE, Ault GT, Lee SW. Factors Associated with a Short (<2 Days) or Long (>10 Days) Length of Stay after Colectomy: A Multivariate Analysis of over 400 Patients. Am Surg. 2016 Oct; 82(10):960-963. View in: PubMed

Rosen DR, Hwang GS, Ault GT, Ortega AE, Cologne KG. Operative management of diverticulitis in a tertiary care center. Am J Surg. 2016 Aug 3. View in: PubMed

Ortega AE. Requiem on the Deep Postanal Space and Supralevator Abscesses. Dis Colon Rectum. 2016 Jul; 59(7):e409. View in: PubMed

Ortega AE. The Author Replies. Dis Colon Rectum. 2016 May; 59(5):e42. View in: PubMed

Patel SS, Patel MS, Goldfarb M, Ortega A, Ault GT, Kaiser AM, Senagore AJ. Elective versus emergency surgery for ulcerative colitis: a National Surgical Quality Improvement Program analysis. Am J Surg. 2013 Mar; 205(3):333-7; discussion 337-8. View in: PubMed

Rosen DR, Cologne KG, Popek SM, Sung BC, Ortega AE, Senagore AJ. Recurrent drug-induced ANCA vasculitis in a patient with Crohn's colitis treated with infliximab: a potential contraindication to immunosuppressive therapy. Am Surg. 2012 Dec; 78(12):1406-8. View in: PubMed

Patel SS, Patel MS, Mahanti S, Ortega A, Ault GT, Kaiser AM, Senagore AJ. Laparoscopic versus Open Colon Resections in California: A Cross-Sectional Analysis. Am Surg. 2012 Oct; 78(10):1063-5. View in: PubMed

Patel SS, Floyd A, Doorly MG, Ortega AE, Ault GT, Kaiser AM, Senagore AJ. Current controversies in the management of colon cancer. Curr Probl Surg. 2012 Jul; 49(7):398-460. View in: PubMed

Petrone P, Inaba K, Wasserberg N, Teixeira PG, Sarkisyan G, Dubose JJ, Fernández MA, Peña FR, Rodríguez MA, Ortega AE, Kaufman HS. Perineal injuries at a large urban trauma center: injury patterns and outcomes. Am Surg. 2009 Apr; 75(4):317-20. View in: PubMed

Lee S, Wasserberg N, Petrone P, Rosca J, Selby R, Ortega A, Kaufman HS. The prevalence of colorectal neoplasia in patients with end-stage renal disease: a case-control study. Int J Colorectal Dis. 2008 Jan; 23(1):47-51. View in: PubMed

Sullivan ME, Ortega A, Wasserberg N, Kaufman H, Nyquist J, Clark R. Assessing the teaching of procedural skills: can cognitive task analysis add to our traditional teaching methods? Am J Surg. 2008 Jan; 195(1):20-3. View in: PubMed

Nunoo-Mensah JW, Ritter MP, Wasserberg N, Ortega A, Harrell D. Pseudoaneurysm of the inferior gluteal artery: an unusual complication after abdominoperineal resection for rectal cancer. Report of a case. Dis Colon Rectum. 2007 Jan; 50(1):115-7. View in: PubMed

Gonzalez-Ruiz C, Kaiser AM, Vukasin P, Beart RW, Ortega AE. Intraoperative physical diagnosis in the management of anal fistula. Am Surg. 2006 Jan; 72(1):11-5. View in: PubMed

Lake JP, Ortega A, Vukasin P, Kaiser AM, Kaufman HS, Beart RW. Internet use by colorectal surgery patients: a surgeon's tool for education and marketing. Am Surg. 2004 Jun; 70(6):553-8. View in: PubMed

Ramirez JI, Vassiliu P, Gonzalez-Ruiz C, Vukasin P, Ortega A, Kaiser AM, Beart RW. Sequential compression devices as prophylaxis for venous thromboembolism in high-risk colorectal surgery patients: reconsidering American Society of Colorectal Surgeons parameters. Am Surg. 2003 Nov; 69(11):941-5. View in: PubMed

Kuehne J, Kleisli T, Biernacki P, Girvigian M, Streeter O, Corman ML, Ortega AE, Vukasin P, Essani R, Beart RW. Use of high-dose-rate brachytherapy in the management of locally recurrent rectal cancer. Dis Colon Rectum. 2003 Jul; 46(7):895-9. View in: PubMed

Kaiser AM, Ortega AE. Anorectal anatomy. Surg Clin North Am. 2002 Dec; 82(6):1125-38, v. View in: PubMed

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