About United Colorectal Surgery

United Colorectal Surgery was established as a division of United Medical Doctors over a decade ago and has since expanded throughout the Southern California region in San Diego County and Riverside County. Specializing in minimally-invasive and robotic surgical techniques, United Colorectal Surgery strives to ensure the highest level of patient satisfaction through expedited recoveries and minimal pain.

Our Mission

We are dedicated to providing unparalleled comprehensive, cutting-edge surgical care to our patients. Our surgeons specialize in minimally-invasive and robotic surgery, affording you the opportunity to recover faster with minimal pain.

Our practice strives to demonstrate compassion while maintaining high reliability as we aim to fulfill a superior patient-centered experience. We thank you for the opportunity to be a part of your healthcare team.

Conditions Treated

  • Abscess: Anorectal & Intestinal
  • Adhesiolysis
  • Anal Fissure
  • Anal & Intestinal Cancer
  • Cholelithiasis
  • Colon & Rectal Cancer
  • Crohn’s Disease
  • Diverticulitis
  • Fecal Incontinence
  • Fistula
  • Gallbladder Disorders
  • Hemorrhoids
  • Hernias (All)
  • Intestinal Obstruction
  • Small Bowel and Colon Resections
  • Urinary Incontinence

Procedures Offered

Our surgeons treat both anal fissures, which are small tears in the thin, moist tissue that lines the anus, and fistulas, which is an infected tunnel between the skin and the anus, utilizing minimally-invasive techniques.

Axonics Therapy is an effective solution for treating symptoms of overactive bladder (including urinary urgency incontinence), bowel (fecal) incontinence and urinary retention that provides gentle stimulation to the nerves that control the bladder and bowel, which can restore normal control and result in symptom improvement.

Cancer surgery includes the removal and treatment of certain tumors.

Our colorectal surgeons utilize the most advanced minimally-invasive surgical techniques for all colon and rectal cancer cases.

Our colorectal surgeons offer the most advanced minimally invasive surgical techniques for treating colorectal cancer, using both robotics and advanced laparoscopics; including the single incision technique (SILS).

Diverticulitis surgery encompasses the surgical treatment for complications from diverticulitis.

Our surgeons offer advanced approaches to the treatment of hemorrhoids including non-surgical therapy with rubber band ligation.

Our surgeons offer advanced, minimally-invasive techniques for the repair of hernias, including robotically. They treat and repair all hernias (hiatal, inguinal, incisional, parastomal, umbilical and ventral).

During laparoscopic surgery, a series of small incisions are made in the abdomen. Carbon dioxide is injected into the abdominal cavity to create space between the abdominal wall and the organs, thus providing ample room for surgeons to work. A small camera called a laparoscope is inserted into one of the incisions, which sends an image back to a large monitor in real-time for the surgeons to view. There are several advantages of laparoscopy, including less pain and discomfort post-op, faster recovery, smaller scars and reduced risk of some complications.

Ostomy, which is a surgery to create an opening from an area inside the body to the outside to treat certain diseases of the digestive or urinary systems, and ostomy care, are offered.

Where Our Surgeons Operate

Our surgeons operate in our out-patient ambulatory surgery centers, United Surgery Centers, in Temecula, Encinitas and Carlsbad, as well as at area hospitals in both Riverside and San Diego Counties.

Area hospitals that our surgeons are credentialed at include Sharp Memorial Hospital, Scripps Memorial Hospital – Encinitas, Temecula Valley Hospital, Riverside Community Hospital and more.

Surgeon Spotlight: Dr. Matthew Schultzel

Dr. Matthew Schultzel is the highest volume robotic general and colorectal surgeon in Southern California and one of the only surgeons on the West Coast providing “Single Port” surgery. He specializes in surgically removing large masses with very small incisions. The result? Quicker recovery, decreased pain and improved cosmetic outcome.

While Dr. Matthew Schultzel’s area of expertise is minimally invasive colorectal surgery, his passion for treating the whole patient is what sets him apart. With a concierge-style practice that prioritizes compassionate, personalized care, he is also one of the only surgeons in Southern California that provides the combined skills of a specialty surgeon and a gastroenterologist with unparalleled results.

Surgeon Spotlight: Dr. Laura DeCesare

Dr. Laura DeCesare is a board-certified surgeon specializing in General Surgery and Colorectal Surgery. She was born and raised in Southern California. She attended Cornell University in New York for her undergraduate education. She earned her medical degree at Tulane University School of Medicine.

Dr. DeCesare completed her General Surgery Residency at Rush University-Cook County in Chicago before pursuing additional training at The Ohio State University for a colorectal fellowship. She gained significant experience in minimally invasive surgery throughout her training and is proud to offer her patients decreased pain, quicker recovery times and compassionate, personalized care.

Surgeon Spotlight: Dr. Aras Emdadi

Dr. Aras Emdadi is a double board-certified colorectal and general surgeon with advanced expertise in minimally invasive and robotic surgery. He works with the advanced robotics program in the Riverside region, utilizing the latest robotics platform, DaVinci 5, and techniques for transanal tumor removal in scarless surgeries. He specializes in the surgical management of complex colorectal diseases, including colorectal cancer, diverticulitis, Crohn’s disease, and ulcerative colitis, with a focus on techniques that promote rapid recovery and improved patient outcomes.

Dr. Emdadi’s clinical philosophy centers on delivering high-quality, evidence-based surgical care while treating each patient with compassion, precision, and individualized attention. He integrates advanced surgical technology with a comprehensive understanding of patient physiology to optimize safety, outcomes, and long-term quality of life.

Surgeon Spotlight: Dr. Brianna Williams

Dr. Brianna Williams is a board-certified general surgeon with advanced expertise in minimally invasive surgery and complex rectal cancer management. She is dedicated to delivering comprehensive, evidence- based surgical care, emphasizing technical precision, thoughtful communication, and individualized treatment planning.

Her practice encompasses a wide spectrum of benign and malignant disease, including colon and rectal cancer, diverticulitis, inflammatory bowel disease, and anorectal disorders. She performs minimally invasive colectomy and proctectomy, low anterior resection, abdominoperineal resection, transanal excision of rectal lesions, ostomy creation and reversal. She works closely with a multidisciplinary team to ensure coordinated, patient-centered oncologic care.

Our Colorectal Surgery Team

Our Locations

La Jolla

4150 Regents Park Row, Ste. 230, La Jolla, CA 92037

Ph: (858) 207-3117 | Fax: (951) 698-0272

Encinitas

477 N. El Camino Real, Ste. C204, Encinitas, CA 92024

Ph: (858) 207-3117 | Fax: (951) 698-0272

Carlsbad

6185 Paseo Del Norte, Ste. 140, Carlsbad, CA 92024

Ph: (858) 207-3117 | Fax: (951) 698-0272

Murrieta

35100 Makena Ave., Ste. 102, Murrieta, CA 92563

Ph: (858) 207-3117 | Fax: (951) 698-0272

Corona

341 Magnolia Ave., Ste. 207, Corona, CA 92879

Ph: (951) 734-9930 | Fax: (951) 734-9692

Riverside

4244 Riverwalk Pkwy., Ste. 290, Riverside, CA 92505

Ph: (951) 520-9392 | Fax: (951) 520-9394

Moreno Valley

12980 Frederick St., Ste. J, Moreno Valley, CA 92553

Ph: 951-788-1450 | Fax: 951-788-2385

Request an Appointment

To schedule an appointment, please call our office directly or request an appointment online through the button below.

San Diego County:
Carlsbad, Encinitas & La Jolla | Ph: (858) 207-3117

Riverside County:
Riverside | Ph: (951) 520-9392
Moreno Valley | Ph: (951) 788-1450
Corona | Ph: (951) 734-9930
Murrieta | Ph: (858) 207-3117

    Please select from the following:

    Which location would you like to be seen at?

    How did you hear about United Medical Doctors?