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Najjia N. Mahmoud, MD

Najjia N. Mahmoud, MD Physician

Chief, Division of Colon and Rectal Surgery Professor of Surgery in Obstetrics and Gynecology Emilie and Roland T. deHellebranth Professor of Surgery

Dr. Mahmoud is employed by Penn Medicine.

About Dr. Najjia N. Mahmoud

Recognized by America's Top Doctors 2015 – 2017

Recognized by Best Doctors in America 2005 - 2018

Recognized annually in Philadelphia magazine's Top Docs issues from 2010 to 2019

Patient Satisfaction Ratings

Patient Rating Breakdown

The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our nationally-recognized Press Ganey Patient Satisfaction Survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.

Responses are measured on a scale of 1 to 5 with 5 being the best score.

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.

Overall Ratings

Clinical Specialties


  • Colon and Rectal Surgery

Programs & Centers:

Board Certification:

  • Colon and Rectal Surgery, 2002
  • Surgery, 2001

Clinical Expertise:

  • Abdominoperineal Resection
  • Anal Abscess
  • Anal Cancer
  • Anal Cerclage
  • Anal Dilation
  • Anal Dysplasia
  • Anal Fissure Fistulectomy
  • Anal Fistula
  • Anal Fistula Repair
  • Anal Incontinence Surgery
  • Anal Polyp
  • Anal Sphincterotomy
  • Anorectal Manometry
  • Anorectal Myectomy
  • Appendectomy
  • Appendiceal Carcinoid
  • Benign Carcinoid Tumor of Rectum
  • Benign Carcinoid Tumor of Small Bowel
  • Benign Neoplasm of Colon
  • Colectomy
  • Colitis
  • Colon Cancer Surgery
  • Colon Resection
  • Colon Tumors
  • Colonic Volvulus
  • Colorectal Cancer
  • Colorectal Conditions
  • Colorectal Surgery
  • Colostomy
  • Crohn's Disease
  • Delorme Procedure
  • Diverticular Disease
  • Diverticulitis (Colonic Diverticulitis)
  • Endoscopic Mucosal Resection
  • Enterovesical Fistula
  • Excision of External Hemorrhoidal Tags and Papillae
  • Familial Polyposis
  • Fissurectomy
  • Gracilis Muscle Transplant for Anal Incontinence
  • Hemicolectomy
  • Hemorrhoid Treatment
  • Hemorrhoidectomy
  • Hemorrhoidopexy Stapling
  • Ileal Pouch-Anal Anastomosis Surgery
  • Ileitis
  • Ileo-Colonic Fistula
  • Ileostomy
  • Incision of Anal Septum
  • Inflammatory Bowel Disease (IBD)
  • Intestinal Obstruction
  • Laparoscopic Anterior Resection
  • Laparoscopic Colectomy
  • Laparoscopic Rectal Prolapse Repair
  • Laparoscopic Treatment of Small Bowel Obstruction
  • Low Anterior Resection
  • Malignant Carcinoid Tumor of the Rectum
  • Ostomy Care
  • Parastomal Hernia
  • Partial Colectomy
  • Pelvic Reconstructive Surgery
  • Peridiverticular Abscess
  • Pilonidal Disease
  • Pouchitis
  • Proctectomy
  • Proctitis
  • Proctocolectomy
  • Proctoplasty for Stenosis
  • Prolapse Colostomy
  • Pseudopolyposis of the Colon
  • Radiation Proctitis
  • Rectal Abscess
  • Rectal Bleeding
  • Rectal Cancer
  • Rectal Hemorrhage
  • Rectal Prolapse
  • Rectovaginal Fistula
  • Refashioning of Colostomy
  • Removal of Anal Seton Marker
  • Repair Anorectal Fistula Plug
  • Repair of Paracolostomy Hernia
  • Repair of Rectal Prolapse
  • Repair of Rectourethral Fistula
  • Revision of Colostomy
  • Sacral Nerve Stimulation for Incontinence
  • Seton Placement
  • Severe Dysplasia of the Rectum
  • Sigmoidectomy
  • Sigmoidoscopy
  • Sigmoid-Vesical Fistula
  • Sphincter Sparing Surgery
  • Sphincteroplasty
  • Sphincterotomy
  • Stapled Transanal Rectal Resection
  • Subtotal Colectomy
  • Surgical Treatment of Crohn's Disease
  • Surgical Treatment of Ulcerative Colitis
  • Transanal Hemorrhoidal Dearterialization Doppler Ligation
  • Transanal Minimally Invasive Surgery
  • Transrectal Drainage of Pelvic Abscess
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Practice Locations and Appointments

Insurance Accepted

  • Aetna US Healthcare
  • Cigna
  • Cigna HealthSpring
  • Clover Health Plan
  • Devon Health Services (Americare)
  • eLAP Services
  • Gateway Health Plan
  • Geisinger Health Plan
  • HealthAmerica / HealthAssurance, a Coventry Plan
  • HealthPartners
  • HealthPartners Medicare
  • HealthSmart
  • Highmark Blue Shield
  • Homestead Smart Health Plans
  • Horizon Blue Cross Blue Shield of New Jersey
  • Humana / Choicecare
  • Independence Blue Cross (Keystone East)
  • Intergroup
  • Keystone First
  • Keystone First Medicare
  • Multiplan
  • NJ Medicaid
  • NJ Qualcare
  • Oxford Health Plan
  • PA Health and Wellness (Centene) Medicare
  • PA Medicaid
  • PA Medicare
  • Preferred Health Care/LGH
  • Provider Partners Health Plan
  • Rail Road Medicare / Palmetto GBA
  • Remedy Partners at Penn Medicine
  • Tricare
  • United Healthcare
  • UnitedHealthcare Community Plan
  • US Family Health Plan
  • Veterans Choice Program

Education and Training

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


Abramson Cancer Center, University of Pennsylvania, Cancer Control and Prevention Group, National American Association for Cancer Research, National American Association of Women Surgeons, National American Board of Colon and Rectal Surgery, National American College of Surgeons, National American Society of Colon and Rectal Surgeons, National Crohn’s and Colitis Foundation of America, National Halsted Society, National Onco-Link consultant, neoplastic diseases of the colon and rectum., International Pennsylvania Society of Colon and Rectal Surgeons, Local Philadelphia Academy of Surgery, Local Society of Surgical Oncology, National Surgical Society of the Alimentary Tract, National

Hospital Affiliation

Dr. Mahmoud is employed by Penn Medicine.

Hospital Privileges:

  • Hospital of the University of Pennsylvania: Has privileges to treat patients in the hospital.
  • Penn Presbyterian Medical Center: Has privileges to treat patients in the hospital.
  • Pennsylvania Hospital: Has privileges to treat patients in the hospital.


Selected Publications:

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): 353-359,1999.

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): 236-238,1999.

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): 101-105,1999.

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 : 530,1999.

Academic Contact Info

Division of Colorectal Surgery - Department of Surgery
Hospital of the University of Pennsylvania
4 Silverstein Pavilion
3400 Spruce Street

Philadelphia, PA 19104
Phone: (215) 662-2078
Patient appointments: 800-789-7366 (PENN)

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