Learn About Us.
At the Advanced Colorectal Clinic, we specialize in the evaluation, diagnosis, prevention, and surgical and non-surgical management of conditions of the colon, rectum, and anus. Led by board-certified colon and rectal surgeons, Dr. Jason Aston and Dr. Keith Hollister, we utilize a team-centered approach to care, providing comprehensive treatments tailored to the individual patient.
Did you know?
We provide convenient online access to our pre-and post-procedure instructions, new patient forms, bill pay, and more.
Jason Aston, MD
Board-Certified Colorectal Surgeon
EDUCATION
Colon and Rectal Surgery Fellowship
Baylor University Medical Center • Dallas, TX
General Surgery Residency
University of South Florida • Tampa, FL
Medical Degree
University of Tennessee College of Medicine
Memphis, TN
BOARD CERTIFICATIONS & MEMBERSHIPS
Board Certified by the American Board of Surgery
Board Certified by the American Board of
Colon and Rectal Surgery
Member of the American Society of Colon and
Rectal Surgeons
Keith Hollister, MD
Board-Certified Colorectal Surgeon
EDUCATION
Colon and Rectal Surgery Fellowship
University of Tennessee Health Science Center
Chattanooga, TN
General Surgery Residency
Indiana University School of Medicine • Indianapolis, IN
Medical Degree
James H. Quillen College of Medicine • Johnson City, TN
BOARD CERTIFICATIONS & MEMBERSHIPS
Board Certified by the American Board of Surgery
Board Certified by the American Board of
Colon and Rectal Surgery
Member of the American Society of Colon and
Rectal Surgeons
More About Us.
The Advanced Colorectal Clinic is a new practice founded in 2021 by Nashville’s established board-certified, colorectal surgeons, Dr. Jason Aston and Dr. Keith Hollister. Although the practice name is new, Drs. Aston, and Hollister are not new to caring for the colon and rectal patients of Tennessee, Kentucky, and the surrounding mid-South.
The Advanced Colorectal Clinic emerged following Dr. Michael Santi’s retirement from the original practice, Colon & Rectal Surgery Associates of Nashville. When Dr. Santi opened this practice in 1986, it served as Nashville’s first and only surgical practice solely dedicated to the prevention, diagnosis, and surgical treatment of conditions of the colon, rectum, and anus. In 2011, Dr. Jason Aston joined Dr. Santi followed by Dr. Keith Hollister in 2017.
Today, Drs. Aston, Hollister and the Advanced Colorectal Team are keenly focused on delivering an exceptional experience. By solely concentrating on the diseases and treatments of the colon, rectum, and anus, patients understand that’s all we do; and, therefore, gain comfort in knowing their surgeon will deliver a treatment plan dedicated to their unique diagnosis. With the continued advancements in robotic surgery as well as many innovative non-surgical treatments, patients and referring providers alike gain confidence in knowing they have selected the area’s leaders in colon and rectal surgery - Dr. Jason Aston and Dr. Keith Hollister.
CONDITIONS
Led by board-certified colon and rectal surgeons, Dr. Jason Aston and Dr. Keith Hollister, our team has proven expertise in treating a wide range of conditions involving the colon, rectum, and anus. Some of these include diverticulitis, inflammatory bowel disease, hemorrhoids, anal pain, itching, abscesses, as well as anal fissures and fistulas, pilonidal disease, familial diseases (FAP, Lynch Syndrome), in addition to colon, rectal, and anal cancers.
Learn more about the conditions we treat>
SPECIALTIES & TREATMENTS
Dr. Aston and Dr. Hollister combine proven time-honored approaches with advanced surgical training to provide the best patient care and outcomes. Furthermore, our use of Enhanced Recovery After Surgery (ERAS) protocols allows for faster recovery, shorter hospital stays, and improved pain control. Some of the treatment options we offer include robotic surgery, transanal minimally invasive surgery, sacral nerve stimulation, J-pouch creation, ostomy creation and management, in-office procedures, and much more.
Learn more about the treatment options we provide>
Patient Testimonials.
I can honestly say they saved my life! The providers have the best bedside manner and are very knowledgeable. Everyone was determined to help me and did. Can't thank the doctors and staff enough for all they do. HIGHLY recommend them.
-Thomas B.
Dr. Aston and his staff are wonderful. My wife and I felt good going in and even better coming out. Thanks to Dr. Aston, Kelly, Autrice, Jordan, and Missy (who we didn't get to meet, but we know she has to be 5-star also working with this staff), we had a very pleasant experience. THANK YOU!
-Bob M.
Not enough stars to express my amazing experience with Dr Hollister. I've never been to a more compassionate, professional, and caring provider before. He was prepared and knew my history and frustrations. He sat with me and my husband for an extended time and educated us through the process. I never felt rushed and felted he truly cared about me as his patient. Recommend him to all.
-Jessica B.
Dr. Aston really did a great job helping my wife. She had her colon removed due to complications from a prior unrelated surgery and he was able to completely fix the damage. Her quality of life has improved enormously. Dr. Aston is the best!
-Paul M.
Dr Hollister was very caring about my procedure and health. I would highly recommend him. He’s one of the most caring doctors I have ever known.
-Robert M.