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Dr. Mark Casillas, MD

Colorectal Surgery*
4.5 (32)
Map Pin Small Knoxville, TN
Accepting new patients
18 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 18 years of experience, and is board certified in General 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 Practice 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.

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Dr. Casillas' Office Locations

  1. 1
    University of Tennessee Medical Center
    1924 Alcoa Hwy, Knoxville, TN 37920 Icon Directions Right Arrow Directions Phone Icon (865) 305-5335
  2. 2
    Office
    1934 Alcoa Hwy Bldg D, 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
Excision of Rectal Tumor
Anal and Rectal Cancer
Colorectal Cancer
Abdominal Pain
Anal Fissure
Anal or Rectal Pain
Anal Sphincter Dysplasia
Anorectal Abscess
Anorectal Fistula
Ascites
  • View other providers who treat Ascites
Congenital Anomaly Intestine
Constipation
Crohn's Disease
Hemorrhoids
Incisional Hernia
Inflammatory Bowel Disease
Intestinal Diverticulosis
Intestinal Fistula
Intestinal Obstruction
Neoplasm of Gastrointestinal Tract
Pelvic Abscess
Proctoptosis
Rectal Prolapse
Rectovaginal Fistula
Small Intestine Cancer
Anal Cauterization
Anal Fistulectomy or Fistulotomy
Anoscopy
  • View other providers who treat Anoscopy
Colectomy
Colectomy Laparoscopic
Colectomy Sigmoidectomy with Robotic Assist
Colonoscopy, Proctosigmoidoscopy, and Sigmoidoscopy
Destruction of Anal Tumor
Excision, Shaving, or Destruction of Skin and Subcutaneous Tissue (incl. Mohs Micrographic Surgery), Tissue Transfer
Removal or Destruction of Rectal or Intestinal Tumor (incl. Colonoscopy, Proctosigmoidoscopy, Sigmoidoscopy and Control of Hemorrhage)
Repair of Anal and Rectal Defects (Anoplasty, Repair of Imperforate Anus, Sphincteroplasty, Rectal Graft)
Wedge Resection Colon
Acute Bowel Infarction
Adrenal Gland Cancer
Anal Cancer
Anal Disorders
Anal Prolapse
Appendicitis
Appendix Cancer
Barrett's Esophagus
Benign Neoplasm of the Digestive System
Biliary Atresia
Biliary Tract Cancer
Bone Cancer
Bowel Strangulation
Breast Cancer
Breast Lump
Burn Injuries
Carcinoma in Situ
Cholangiocarcinoma
Cholecystitis and Gallstones
Colon Cancer
Colon Disorders
Colon Polyp
Colonic Diverticulosis
Colorectal Polyp
Diaphragmatic and Hiatal Hernia
Diverticulitis
Ductal Carcinoma in Situ
Esophageal Cancer
Esophageal Diverticulum
Familial Colorectal Cancer
Familial Polyposis
Familial Polyposis, Classical
Fecal Incontinence
Fissures
  • View other providers who treat Fissures
Gallbladder and Biliary Tract Cancer
Gallbladder Cancer
Gallstones
Gastric Ulcer
Gastroenterologic Cancer (Colon, Stomach, Esophageal, Liver)
Gastroparesis
Gynecologic Cancer
Hereditary Nonpolyposis Colon Cancer
Hiatal Hernia
Hidradenitis
Hyperparathyroidism
Ileus
  • View other providers who treat Ileus
Inguinal Hernia
Intestinal Abscess
Intestinal Atresia
Intestinal Prolapse
Ischemic Colitis
Lipomas
  • View other providers who treat Lipomas
Liver Cancer
Lung Cancer
Meckel's Diverticulum
Median Arcuate Ligament Syndrome (MALS)
Megacolon
Mesenteric Lymphadenitis
Neuroendocrine Tumors
Osteosarcoma
Pancreatic Cancer
Parathyroid (Gland) Disease
Partial Lung Collapse
Peptic Ulcer
Peripheral Arterial Embolism and Thrombosis
Peripheral Vascular Disease (PAD, PVD)
Pilonidal Cyst
Pleural Effusion
Pouchitis
Primary Sclerosing Cholangitis
Rectal Abscess
Rectal Bleeding
Rectal Cancer
Rectal Diseases
Rectal-Colon Bleeding
Ruptured Aortic Aneurysm
Second-Degree Burns
Secondary Malignancies
Soft Tissue Sarcoma
Stomach and Small Intestine Cancer
Stomach Cancer
Thoracic Outlet Syndrome
Thyroid Cancer
Thyroid Nodule
Traumatic Brain Injury
Tubo-Ovarian Abscess
Ulcerative Colitis
Ulcerative Proctosigmoiditis
Umbilical Hernia
Varicose Veins
Vascular Insufficiency of Intestines
Ventral Hernia
Vulvar Cancer
Abdominoplasty
Abscess Incision and Drainage
Abscess or Cyst Drainage or Aspiration
Abscess or Fluid Incision and Drainage
Adjacent Tissue Transfer
Advanced Laparoscopic Surgery
Anoscopy With Removal of Anal Tumor
Arterial Catheterization with Robotic Assist
Augmentation Cystoplasty
Bladder Stimulator Implant
Bone Marrow Biopsy
Colon and Rectal Surgery
Colon Cancer Screening
Colon Surgery
Colonoscopy
Colonoscopy With Polypectomy
Colorectal Cancer Screening
Colorectal Cancer Treatment
Colostomy
Complete Nephrectomy With Robotic Assistance
Cyst Incision and Drainage
Cystectomy
da Vinci® Colectomy
da Vinci® Robotic Surgery
Dressing and-or Debridement of Wound, Infection, or Burn
Duodenal Polypectomy
Endoscopy
Endoscopy (Esophagus, Stomach, Small Intestine)
Enterostomy (Laparoscopic or Open)
Excision of Anal Tags
Excision of Esophageal Lesion
Fecal Impaction Removal
Flexible Sigmoidoscopy
Flexible Sigmoidoscopy with Robotic Assist
Gallbladder Removal
Gastrointestinal Surgery
Gastrotomy
Hemicolectomy
Hemorrhoid Removal
Hemorrhoid Treatment
Hernia Repair
Ileal Pouch-Anal Anastomosis
Incontinence Surgery
Interstim® Sacral Nerve Stimulator
Intestinal Transplant (incl. Enterectomy)
Lap Vaginal Hysterectomy with Robotic Assist
Laparoscopic Abdominoperineal Resection of the Rectum With Robotic Assistance
Laparoscopic Appendectomy
Laparoscopic Colectomy
Laparoscopic Colon Surgery
Laparoscopic Excision or Destruction of Ovary
Laparoscopic Incisional Hernia Repair
Laparoscopic Rectal Surgery
Laparoscopic Surgical Procedure
Laparoscopy
Laparotomy
Liver Biopsy
Lymph Node Biopsy or Excision
Lymphadenectomy with Robotic Assist
Lymphadenectomy With Robotic Assistance
Minimal Access Surgery
Minimally Invasive Surgery
Nephrectomy
Nephrectomy with Robotic Assist
Open Appendectomy
Open Incisional or Ventral Hernia Repair
Peripheral Artery Catheterization
Port Placements or Replacements
Procetectomy With Robotic Assist
Proctectomy
Proctosigmoidopexy with Robotic Assist
Puncture Aspiration
Rectal Surgery
Rectovaginal Repair
Renal Transplant
Repair of Rectocele with Robotic Assist
Restorative Proctocolectomy With Ileal-Anal J Pouch
Rigid Sigmoidoscopy
Salpingectomy with Robotic Assist
Salpingo Oopherectomy
Sigmoid Colectomy
Sigmoidoscopy
Skin Lesion Removal
Small Bowel Surgery
Snare Polypectomy
Soft Tissue Tumor Removal
Sphincterotomy
Surgical Procedures
Total Salpingectomy With Robotic Assistance
Tumor Resection
Vaginal Prolapse Surgery
Ventral Hernia Repair Open
Wound Repair
Check your insurance
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    View All Accepted Carriers

    • Aetna
    • Anthem
    • AvMed
    • Blue Cross Blue Shield
    • Buckeye Community Health Plan
    • CareFirst Blue Cross Blue Shield
    • Cigna
    • Commercial Insurance Company
    • EmblemHealth
    • First Health
    • Health Net
    • Humana
    • Mail Handlers Benefit Plan (MHBP)
    • Midwest Health Plan
    • MultiPlan
    • 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.

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    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

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    Dr. Casillas' Office & Staff

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    Experience with Dr. Casillas

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

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    About Dr. Mark Casillas, MD

    Specialties*
    • Colorectal Surgery

    • *Healthline does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
    Specialties*
    Years of Experience
    • 18 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
    • 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 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?
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    (865) 305-5335

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