Penn Medicine Provider
Colon and Rectal Surgery
Najjia N. Mahmoud, MD
4.8
(946)
Accepting new patients
Sees patients age 18 and up
Penn Colon and Rectal Surgery Perelman

About me

  • Chief, Division of Colon and Rectal Surgery
  • Emilie and Roland T. deHellebranth Professor of Surgery

Education and training

  • Medical School: NewYork-Presbyterian / Weill Cornell Medical Center
  • Residency: NewYork-Presbyterian/Weill Cornell Medical Center
  • Fellowship: University of Minnesota Hospitals

What my patients think about me

Average Rating
4.8

946 reviews

Comments are submitted by patients and reflect their views and opinions. The comments are not endorsed by and do not necessarily reflect the views of Penn Medicine.

May 2025
5.0
5.0
very professional and kind
April 2025
5.0
5.0
always great care.
April 2025
5.0
5.0
i felt really comfortable with her
April 2025
5.0
5.0
she's very kind, informative, and thorough

Insurance accepted

My Locations

Penn Medicine hospital privileges

  • Hospital of the University of Pennsylvania: Has privileges to treat patients in the hospital.
  • Pennsylvania Hospital: Has privileges to treat patients in the hospital.
  • Penn Presbyterian Medical Center: Has privileges to treat patients in the hospital.
Dr. Mahmoud is a Penn Medicine physician.

Qualifications and experience

Treatments and Conditions

My research

Stein D, Mahmoud NN, Rose D, Anne P, Goldstein S, Isenberg G, Mitchell E, Fry RD. A Longer Time Interval Between Completion of Neoadjuvant Chemoradiation and Surgical Resection Does not Improve Downstaging of Rectal Carcinoma. , Proceedings of the American Society of Colon and Rectal Surgeons : 2002


Mahmoud NN, Madoff RD, Rothernberger DA, Finne CO. TEM Reduces the Incidence of Positive Margins Compared to Transanal Excision for Rectal Tumors. , Proceedings of the American Society of Colon and Rectal Surgeons : 2001


Mahmoud NN, Bilinski RT, Churchill MR, Edelmann W, Kucherlapati R, Bertagnolli MM Genotype-phenotype correlation in murine APC utation: Differences in enterocyte migration and response to sulindac , Cancer Research, 59(2): 1999,353-359


Mahmoud NN, Mack CA, DeCosse JJ, Michaeli J, Bertagnolli MM Debulking of a gastrointestinal hemangioma alleviates coagulopathy associated with Kasabach-Merritt syndrome , Surgery, 125(2): 1999,236-238


Mahmoud NN, Bilinski RT, Mestre J, Martucci C, Bertagnolli MM Administration of an unconjugated bile acid increases duodenal tumors in a murine model of familial adenomatous polyposis , Carcinogenesis, 20(2): 1999,101-105


Carothers AM, Chiao C, Barrett JC, Mahmoud NN, Weyant MJ, Bilinski RT, Churchill MR, Grunberger D, Bertagnolli MM. Caffeic Acid Phenethyl Ester (CAPE) Prevents Tumors in Min/+ Mice and Regulates p53 Function In Vitro. , International Society of Cancer Chemoprevention, Strang International Cancer Prevention Conference, November 14, 1998; Annals of the New York Academy of Science: 1999


Carothers AM, Weyant MJ, Mahmoud NN, Bilinski RT, Bertagnolli MM Estrogen modulates intestinal tumorigenesis in vitro and in vivo , Proceedings of the American Association of Cancer Research , 40: 1999,530