See All Colon Surgeons & Rectal Surgeons in Knoxville, TN
Dr. Mark Casillas, MD Icon-share Share Profile
icon-circle-check
Link Copied!
Profile link copied to clipboard!
Super Profile

Dr. Mark Casillas, MD

Colorectal Surgery
4.5 (32)
Map Pin Small Knoxville, TN
Accepting new patients
17 years of experience

Offers telehealth

Overview of Dr. Mark Casillas, MD

Dr. Mark Casillas, MD is a Colorectal Surgery Specialist in Knoxville, TN. They specialize in Colorectal Surgery, has 17 years of experience, and is board certified in Colon & Rectal Surgery. They graduated from University of Alabama at Birmingham and is affiliated with University of Tennessee Medical Center. Dr. Casillas, completed a residency at St. Joseph Mercy Hospital-General Surgery Residency. Patients rated Dr. Casillas an average 4.5 star rating.

Dr. Casillas works at University Colon and Rectal Surgery in Knoxville, TN. They frequently treat conditions like Anal and Rectal Cancer along with other conditions at varying frequencies. They are accepting new patients and accept Aetna, Anthem and Blue Cross Blue Shield as well as other major insurance plans. Please call ahead to schedule an appointment and to confirm all accepted insurance plans.

FindCare Super Profile Designation
Super Profile
5/5
Customize your search with filters that provide more Super Profile results near you
User Ratings (of at least 4.0)
Insurance Accepted
Headshot Available
Accepting New Patients
Conditions Treated and Procedures Performed
Start the search for a new doctor with Super Profiles and customizable filters that matter the most to you.
Customize Search

Dr. Casillas' Office Locations

  1. 1
    University Colon and Rectal Surgery
    1934 Alcoa Hwy Ste D370, Knoxville, TN 37920 Icon Directions Right Arrow Directions Phone Icon (865) 305-5335

Hospital Affiliations
Admitting Hospitals

Admitting hospitals are where the provider is credentialed to see patients, perform procedures, and send patients for continuous care.

  • University of Tennessee Medical Center

Experience & Treatment Frequency

NEW FEATURE

What is treatment frequency?

Our treatment frequency feature helps you understand howoften a provider performs or treats a specificprocedure/condition compared to other doctors. Providersrank in one of four frequency categories:

Very HighFrequency
HighFrequency
NormalFrequency
May Perform

Specific procedures/conditions that don’t haveenough data are indicated with “May Perform”. We encourageyou to contact the provider with questions about theirexperience.

Search for conditions or procedures.
Hemorrhoidectomy or Excision of Anal Tags
Excision of Rectal Tumor
Anal and Rectal Cancer
Hemorrhoidectomy or Excision of Anal Tags
Excision of Rectal Tumor
Anal and Rectal Cancer

Treatment frequency



Many providers have expertise treating multiple conditions or procedures. FindCare uses a variety of data sources to determine which conditions or procedures a provider treats and their level of experience.
Hemorrhoidectomy or Excision of Anal Tags Chevron Icon
Excision of Rectal Tumor Chevron Icon
Anal and Rectal Cancer Chevron Icon
Colorectal Cancer Chevron Icon
Abdominal Pain Chevron Icon
Anal Fissure Chevron Icon
Anal or Rectal Pain Chevron Icon
Anal Sphincter Dysplasia Chevron Icon
Anorectal Abscess Chevron Icon
Anorectal Fistula Chevron Icon
Ascites Chevron Icon
  • View other providers who treat Ascites
Congenital Anomaly Intestine Chevron Icon
Constipation Chevron Icon
Crohn's Disease Chevron Icon
Hemorrhoids Chevron Icon
Incisional Hernia Chevron Icon
Inflammatory Bowel Disease Chevron Icon
Intestinal Diverticulosis Chevron Icon
Intestinal Fistula Chevron Icon
Intestinal Obstruction Chevron Icon
Neoplasm of Gastrointestinal Tract Chevron Icon
Pelvic Abscess Chevron Icon
Proctoptosis Chevron Icon
Rectal Prolapse Chevron Icon
Rectovaginal Fistula Chevron Icon
Small Intestine Cancer Chevron Icon
Anal Cauterization Chevron Icon
Anal Fistulectomy or Fistulotomy Chevron Icon
Anoscopy Chevron Icon
  • View other providers who treat Anoscopy
Colectomy Chevron Icon
Colectomy Laparoscopic Chevron Icon
Colectomy Sigmoidectomy with Robotic Assist Chevron Icon
Colonoscopy, Proctosigmoidoscopy, and Sigmoidoscopy Chevron Icon
Destruction of Anal Tumor Chevron Icon
Excision, Shaving, or Destruction of Skin and Subcutaneous Tissue (incl. Mohs Micrographic Surgery), Tissue Transfer Chevron Icon
Removal or Destruction of Rectal or Intestinal Tumor (incl. Colonoscopy, Proctosigmoidoscopy, Sigmoidoscopy and Control of Hemorrhage) Chevron Icon
Repair of Anal and Rectal Defects (Anoplasty, Repair of Imperforate Anus, Sphincteroplasty, Rectal Graft) Chevron Icon
Wedge Resection Colon Chevron Icon
Acute Bowel Infarction Chevron Icon
Adrenal Gland Cancer Chevron Icon
Anal Cancer Chevron Icon
Anal Disorders Chevron Icon
Anal Prolapse Chevron Icon
Appendicitis Chevron Icon
Appendix Cancer Chevron Icon
Barrett's Esophagus Chevron Icon
Benign Neoplasm of the Digestive System Chevron Icon
Biliary Atresia Chevron Icon
Biliary Tract Cancer Chevron Icon
Bone Cancer Chevron Icon
Bowel Strangulation Chevron Icon
Breast Cancer Chevron Icon
Breast Lump Chevron Icon
Burn Injuries Chevron Icon
Carcinoma in Situ Chevron Icon
Cholangiocarcinoma Chevron Icon
Cholecystitis and Gallstones Chevron Icon
Colon Cancer Chevron Icon
Colon Disorders Chevron Icon
Colon Polyp Chevron Icon
Colonic Diverticulosis Chevron Icon
Colorectal Polyp Chevron Icon
Diaphragmatic and Hiatal Hernia Chevron Icon
Diverticulitis Chevron Icon
Ductal Carcinoma in Situ Chevron Icon
Esophageal Cancer Chevron Icon
Esophageal Diverticulum Chevron Icon
Familial Colorectal Cancer Chevron Icon
Familial Polyposis Chevron Icon
Familial Polyposis, Classical Chevron Icon
Fecal Incontinence Chevron Icon
Fissures Chevron Icon
  • View other providers who treat Fissures
Gallbladder and Biliary Tract Cancer Chevron Icon
Gallbladder Cancer Chevron Icon
Gallstones Chevron Icon
Gastric Ulcer Chevron Icon
Gastroenterologic Cancer (Colon, Stomach, Esophageal, Liver) Chevron Icon
Gastroparesis Chevron Icon
Gynecologic Cancer Chevron Icon
Hereditary Nonpolyposis Colon Cancer Chevron Icon
Hiatal Hernia Chevron Icon
Hidradenitis Chevron Icon
Hyperparathyroidism Chevron Icon
Ileus Chevron Icon
  • View other providers who treat Ileus
Inguinal Hernia Chevron Icon
Intestinal Abscess Chevron Icon
Intestinal Atresia Chevron Icon
Intestinal Prolapse Chevron Icon
Ischemic Colitis Chevron Icon
Lipomas Chevron Icon
  • View other providers who treat Lipomas
Liver Cancer Chevron Icon
Lung Cancer Chevron Icon
Meckel's Diverticulum Chevron Icon
Median Arcuate Ligament Syndrome (MALS) Chevron Icon
Megacolon Chevron Icon
Mesenteric Lymphadenitis Chevron Icon
Neuroendocrine Tumors Chevron Icon
Osteosarcoma Chevron Icon
Pancreatic Cancer Chevron Icon
Parathyroid (Gland) Disease Chevron Icon
Partial Lung Collapse Chevron Icon
Peptic Ulcer Chevron Icon
Peripheral Arterial Embolism and Thrombosis Chevron Icon
Peripheral Vascular Disease (PAD, PVD) Chevron Icon
Pilonidal Cyst Chevron Icon
Pleural Effusion Chevron Icon
Pouchitis Chevron Icon
Primary Sclerosing Cholangitis Chevron Icon
Rectal Abscess Chevron Icon
Rectal Bleeding Chevron Icon
Rectal Cancer Chevron Icon
Rectal Diseases Chevron Icon
Rectal-Colon Bleeding Chevron Icon
Ruptured Aortic Aneurysm Chevron Icon
Second-Degree Burns Chevron Icon
Secondary Malignancies Chevron Icon
Soft Tissue Sarcoma Chevron Icon
Stomach and Small Intestine Cancer Chevron Icon
Stomach Cancer Chevron Icon
Thoracic Outlet Syndrome Chevron Icon
Thyroid Cancer Chevron Icon
Thyroid Nodule Chevron Icon
Traumatic Brain Injury Chevron Icon
Tubo-Ovarian Abscess Chevron Icon
Ulcerative Colitis Chevron Icon
Ulcerative Proctosigmoiditis Chevron Icon
Umbilical Hernia Chevron Icon
Varicose Veins Chevron Icon
Vascular Insufficiency of Intestines Chevron Icon
Ventral Hernia Chevron Icon
Vulvar Cancer Chevron Icon
Abdominoplasty Chevron Icon
Abscess Incision and Drainage Chevron Icon
Abscess or Cyst Drainage or Aspiration Chevron Icon
Abscess or Fluid Incision and Drainage Chevron Icon
Adjacent Tissue Transfer Chevron Icon
Advanced Laparoscopic Surgery Chevron Icon
Anoscopy With Removal of Anal Tumor Chevron Icon
Arterial Catheterization with Robotic Assist Chevron Icon
Augmentation Cystoplasty Chevron Icon
Bladder Stimulator Implant Chevron Icon
Bone Marrow Biopsy Chevron Icon
Colon and Rectal Surgery Chevron Icon
Colon Cancer Screening Chevron Icon
Colon Surgery Chevron Icon
Colonoscopy Chevron Icon
Colonoscopy With Polypectomy Chevron Icon
Colorectal Cancer Screening Chevron Icon
Colorectal Cancer Treatment Chevron Icon
Colostomy Chevron Icon
Complete Nephrectomy With Robotic Assistance Chevron Icon
Cyst Incision and Drainage Chevron Icon
Cystectomy Chevron Icon
da Vinci® Colectomy Chevron Icon
da Vinci® Robotic Surgery Chevron Icon
Dressing and-or Debridement of Wound, Infection, or Burn Chevron Icon
Duodenal Polypectomy Chevron Icon
Endoscopy Chevron Icon
Endoscopy (Esophagus, Stomach, Small Intestine) Chevron Icon
Enterostomy (Laparoscopic or Open) Chevron Icon
Excision of Anal Tags Chevron Icon
Excision of Esophageal Lesion Chevron Icon
Fecal Impaction Removal Chevron Icon
Flexible Sigmoidoscopy Chevron Icon
Flexible Sigmoidoscopy with Robotic Assist Chevron Icon
Gallbladder Removal Chevron Icon
Gastrointestinal Surgery Chevron Icon
Gastrotomy Chevron Icon
Hemicolectomy Chevron Icon
Hemorrhoid Removal Chevron Icon
Hemorrhoid Treatment Chevron Icon
Hernia Repair Chevron Icon
Ileal Pouch-Anal Anastomosis Chevron Icon
Incontinence Surgery Chevron Icon
Interstim® Sacral Nerve Stimulator Chevron Icon
Intestinal Transplant (incl. Enterectomy) Chevron Icon
Lap Vaginal Hysterectomy with Robotic Assist Chevron Icon
Laparoscopic Abdominoperineal Resection of the Rectum With Robotic Assistance Chevron Icon
Laparoscopic Appendectomy Chevron Icon
Laparoscopic Colectomy Chevron Icon
Laparoscopic Colon Surgery Chevron Icon
Laparoscopic Excision or Destruction of Ovary Chevron Icon
Laparoscopic Incisional Hernia Repair Chevron Icon
Laparoscopic Rectal Surgery Chevron Icon
Laparoscopic Surgical Procedure Chevron Icon
Laparoscopy Chevron Icon
Laparotomy Chevron Icon
Liver Biopsy Chevron Icon
Lymph Node Biopsy or Excision Chevron Icon
Lymphadenectomy with Robotic Assist Chevron Icon
Lymphadenectomy With Robotic Assistance Chevron Icon
Minimal Access Surgery Chevron Icon
Minimally Invasive Surgery Chevron Icon
Nephrectomy Chevron Icon
Nephrectomy with Robotic Assist Chevron Icon
Open Appendectomy Chevron Icon
Open Incisional or Ventral Hernia Repair Chevron Icon
Peripheral Artery Catheterization Chevron Icon
Port Placements or Replacements Chevron Icon
Procetectomy With Robotic Assist Chevron Icon
Proctectomy Chevron Icon
Proctosigmoidopexy with Robotic Assist Chevron Icon
Puncture Aspiration Chevron Icon
Rectal Surgery Chevron Icon
Rectovaginal Repair Chevron Icon
Renal Transplant Chevron Icon
Repair of Rectocele with Robotic Assist Chevron Icon
Restorative Proctocolectomy With Ileal-Anal J Pouch Chevron Icon
Rigid Sigmoidoscopy Chevron Icon
Salpingectomy with Robotic Assist Chevron Icon
Salpingo Oopherectomy Chevron Icon
Sigmoid Colectomy Chevron Icon
Sigmoidoscopy Chevron Icon
Skin Lesion Removal Chevron Icon
Small Bowel Surgery Chevron Icon
Snare Polypectomy Chevron Icon
Soft Tissue Tumor Removal Chevron Icon
Sphincterotomy Chevron Icon
Surgical Procedures Chevron Icon
Total Salpingectomy With Robotic Assistance Chevron Icon
Tumor Resection Chevron Icon
Vaginal Prolapse Surgery Chevron Icon
Ventral Hernia Repair Open Chevron Icon
Wound Repair Chevron Icon
Check your insurance
    Close Icon
    Please double-check when making an appointment.

    View All Accepted Carriers

    • Aetna
    • Anthem
    • AvMed
    • Blue Cross Blue Shield
    • CareFirst Blue Cross Blue Shield
    • Cigna
    • Commercial Insurance Company
    • EmblemHealth
    • First Health
    • Humana
    • Mail Handlers Benefit Plan (MHBP)
    • Medicaid
    • Medicare
    • MultiPlan
    • Tricare
    • UnitedHealthCare

    * Please verify this information when scheduling an appointment.

    Ratings & Reviews
    Reviews are displayed in date order and collected from patients who have agreed to reporting accurate and fair reviews. Providers with no reviews may have a new FindCare profile, or no submitted reviews on FindCare yet.

    Learn more about how FindCare's ratings and reviews work

    4.5
    Average provider rating
    Based on 32 ratings
    Patient Ratings (32)
    5 Star
    (27)
    4 Star
    (0)
    3 Star
    (1)
    2 Star
    (1)
    1 Star
    (3)
    Leave a review

    How was your appointment with Dr. Casillas?

    Read more reviews on Healthgrades
    Photo: Dr. Mark Casillas, MD
    How would you rate your experience with Dr. Mark Casillas, MD?
    • Likelihood of recommending Dr. Casillas to family and friends

    Dr. Casillas' Office & Staff

    • Ease of scheduling urgent appointments
    • Office environment, cleanliness, comfort, etc.
    • Staff friendliness and courteousness
    • Total wait time (waiting & exam rooms)

    Experience with Dr. Casillas

    • Level of trust in provider's decisions
    • How well provider explains medical condition(s)
    • How well provider listens and answers questions
    • Hpends appropriate amount of time with patients

    Tell Us About Yourself

    • Your gender:
    • Your age group:
    • Number of office visits you've had in the last 2 years:

    Finish Here

    • How would you like to confirm your survey information?
      Standard text messaging and data rates may apply.
    Thank you for sharing your feedback about Dr. Mark Casillas, MD.

    About Dr. Mark Casillas, MD

    Specialties
    • Colorectal Surgery
    Specialties
    Years of Experience
    • 17 years of experience
    Years of Experience
    Years of experience represents how long a provider has been practicing in their field since graduating from medical school. Not all providers will have this information available.
    Languages Spoken
    • English
    Languages Spoken
    NPI Number
    • 1245458082
    NPI Number
    A National Provider Identifier (NPI) is a unique 10-digit identifier issued by the government to healthcare providers.

    Education & Certifications

    Fellowship
    • Indiana School Of Medicine-Colon & Rectal Surgery Residency
    Fellowship
    Residency
    • St. Joseph Mercy Hospital-General Surgery Residency
    Residency
    Internship
    • BROWN UNIVERSITY
    Internship
    Medical Education
    • University of Alabama at Birmingham
    Medical Education
    Undergraduate School
    • University of Alabama
    Undergraduate School
    Board Certifications
    • Colon & Rectal Surgery and General Surgery
    Board Certifications
    What’s a board certification and why is it important that my provider has one?

    A board certification represents a provider’s dedication to ongoing training in one or more specialties, including the completion of intensive exams. While not all specialties have board certifications, if your provider does have one they’ve taken the extra step to master their specialty and to keep up with the latest advancements in their field.

    Frequently Asked Questions

    Dr. Mark Casillas, MD is accepting new patients on Healthline FindCare. You can check to see if Dr. Casillas is offering online scheduling or call the provider’s office for more information.

    Dr. Casillas has indicated that they do offer telehealth services. Please call the provider’s office at for more information.

    Dr. Casillas works at University Colon and Rectal Surgery in Knoxville, TN. View the full address on Dr. Casillas’s profile.

    Dr. Casillas has seen patients for Anal and Rectal Cancer, and more. You can see other conditions treated by Dr. Casillas on their profile. Please call the provider’s office to confirm all visit reasons.

    32 patients have reviewed Dr. Casillas. The overall rating for this provider is 4.5. You can read verified reviews and ratings and leave your own review based on your experience with Dr. Casillas.

    Whether a person prefers to schedule an appointment online or over the phone with Dr. Casillas, there are benefits to both methods. A person calling to schedule an with Dr. Casillas appointment can ask questions about the practice, provider availability, conditions treated, procedures performed, and if their insurance carrier is accepted. While online scheduling is quicker, easier, allows one to view a wide range of appointment times, and may provide the ability to sync with a personal calendar.

    Telehealth Options
    This provider has not specified a telehealth appointment method. Would you still like to make an appointment with Dr. Casillas, or would you like to choose another provider and have an online appointment right now?
    Find provider online now
    Call now to make an appointment
    (865) 305-5335

    Are you Dr. Mark Casillas, MD?

    Claim your profile through Healthgrades to keep it updated and reach more patients.

    It’s free and only takes a minute.

    CLAIM MY PROFILE

    Search

    Primary Care
    Close Icon

    In the event of a medical emergency, dial 911 or visit your closest emergency room immediately.