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

Provider Type



Colon and Rectal Surgery

Board Certifications

Colon and Rectal Surgery

General Surgery


Texas Colon & Rectal Specialists–Dallas Woodhill Medical Park
8315 Walnut Hill Lane, Suite 220
Dallas, Texas 75231
Phone: 214-363-6123
Fax: 866-644-6809

Spoken Languages


Prep Kit Instructions

Colonoscopy Prep Instructions


  • 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

Primary Hospital Affiliations and Surgical Facilities

  • North Central Surgical Center
  • 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.


Existing patients please access the patient portal login to request an appointment.