texas oncology more breakthroughs. more victories

J. Marcus Downs, M.D., FACS, FASCRS

J. Marcus Downs, M.D., FACS, FASCRS Photo

Provider Type: Physician

Board Certifications:
  • Colon and Rectal Surgery
  • General Surgery


General Summary


J. Marcus Downs, M.D., FACS, FASCRS, served as the program director for the residency program in colon and rectal surgery at Parkland Memorial Hospital and Texas Health Presbyterian Hospital in Dallas for 12 years. Dr. Downs has conducted his private practice as a part of Texas Colon & Rectal Specialists since 1993. 


  • Fellowship in Colon and Rectal Surgery
    Parkland Memorial Hospital and Texas Health Presbyterian Hospital Dallas, Dallas, TX
  • Residency in General Surgery
    Wilford Hall United States Air Force Medical Center, San Antonio, TX
  • Internship in Surgery
    University of Missouri, Columbia, MO
  • Medical Doctorate
    University of Missouri, Columbia, MO

Accolades & Memberships

  • American Board of Colon and Rectal Surgery
  • American Board of Surgery
  • American College of Surgeons, Fellow
  • American Medical Association
  • American Society of Colon and Rectal Surgeons, Fellow
  • D Magazine Best Doctors in Dallas (2001, 2003–2020)
  • Dallas County Medical Society
  • Texas Medical Association

Surgery Locations

  • North Central Surgical Center Hospital
  • North Texas Team Care Surgery Center
  • Park Cities Surgery Center
  • Texas Health Presbyterian Hospital Dallas


  • Anal Cancer
  • Anal Fissure
  • Anal Fistula
  • Anal Warts
  • Anorectal Abscess
  • Colon Cancer
  • Crohn's Disease
  • Diverticulitis
  • Diverticulosis
  • Fecal Incontinence
  • Hemorrhoids
  • Inflammatory Bowel Disease
  • Ostomy
  • Pelvic Floor Therapy
  • Pilonidal Disease
  • Polyps of the Colon and Rectum
  • Pruritus Ani
  • Rectal Bleeding
  • Rectal Cancer
  • Rectal Prolapse
  • Rectocele
  • Ulcerative Colitis


  • Anal Fissurectomy
  • Anal Fistulectomy
  • Anorectal Manometry
  • Bioethics
  • Hemorrhoid, Rubber Band Ligation
  • Hemorrhoidectomy
  • High Resolution Anoscopy
  • Infrared Coagulation
  • Sacral Neuromodulation
  • Screening, Diagnostic and Therapeutic Colonoscopy
  • Sigmoidoscopy
  • Transanal Hemorrhoidal Dearterialization (THD)

Other Information

Dr. Downs claims a variety of interests and hobbies ranging from bluegrass music to water polo. He is an enthusiastic cyclist, loves to swim, and still finds time for another favored pastime, reading. Dr. Downs is a United States Air Force veteran and resides in Dallas with his wife and two children.