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Dr. Mark Casillas, MD

Colorectal Surgery* Age 46
Dr. Mark Casillas, MD
4.5 (33 Ratings)

Offers telehealth

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Dr. Mark Casillas, MD is a Colorectal Surgeon in Knoxville, TN.
Dr. Mark Casillas, MD
4.5 (33 Ratings)
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Dr. Mark Casillas, MD

Colorectal Surgery* Age 46
Knoxville, TN
Accepting new patients
18 years of experience

Offers telehealth

Dr. Mark Casillas, MD is a Colorectal Surgeon in Knoxville, TN.

About

Dr. Casillas graduated from University of Alabama at Birmingham in 2006 and completed a residency at St. Joseph Mercy Hospital-General Surgery Residency.Dr. Mark Casillas, MD is a Colorectal Surgeon in Knoxville, TN and has 18 years experience. Dr. Casillas currently practices at Practice and are affiliated with University of Tennessee Medical Center. Dr. Casillas has experience treating conditions like Anorectal Fistula and Colorectal Cancer among other conditions at varying frequencies. At present, Dr. Casillas received an average rating of 4.5/5 from patients and has been reviewed 33 times. Dr. Casillas' office accepts new patients and telehealth appointments. Dr. Casillas is board certified in Colon & Rectal Surgery and accepts multiple insurance plans.

Offers Telehealth

This provider offers telehealth appointments. Call the office to schedule.

Explains Conditions Well

Patients said this doctor explains conditions well.

Trustworthy

Patients said this doctor is trustworthy.

Friendly Staff

Patients said the staff was friendly.

Easy Scheduling

Patients said scheduling was easy.

Experience Check

Enter a condition or procedure
Anorectal Fistula
Colorectal Cancer
Hemorrhoidectomy or Excision of Anal Tags
Anorectal Fistula
Colorectal Cancer
Hemorrhoidectomy or Excision of Anal Tags
Anorectal Fistula
Colorectal Cancer
Hemorrhoidectomy or Excision of Anal Tags
Anal and Rectal Cancer
Neoplasm of Gastrointestinal Tract
Colectomy
Destruction of Anal Tumor
Excision of Rectal Tumor
Abdominal Pain
Anal Fissure
Anal or Rectal Pain
Anal Sphincter Dysplasia
Anorectal Abscess
Ascites
  • View other providers who treat Ascites
Congenital Anomaly Intestine
Constipation
Crohn's Disease
Hemorrhoids
Incisional Hernia
Inflammatory Bowel Disease
Inguinal Hernia
Intestinal Diverticulitis
Intestinal Diverticulosis
Intestinal Fistula
Intestinal Obstruction
Pelvic Abscess
Proctoptosis
Rectal Prolapse
Rectovaginal Fistula
Small Intestine Cancer
Anal Cauterization
Anal Fistulectomy or Fistulotomy
Anoscopy
  • View other providers who treat Anoscopy
Colectomy Laparoscopic
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)
Sphincterotomy
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
Hirschsprung's Disease
Hyperparathyroidism
Ileus
  • View other providers who treat Ileus
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
Colectomy Sigmoidectomy with Robotic Assist
Colon and Rectal Surgery
Colon Cancer Screening
Colon Surgery
Colonoscopy
Colonoscopy With Polypectomy
Colonoscopy, Proctosigmoidoscopy, and Sigmoidoscopy
Colorectal Cancer Screening
Colorectal Cancer Treatment
Colorectal Surgery, Robotic-Assisted
Colostomy
Complete Nephrectomy With Robotic Assistance
Cyst Incision and Drainage
Cystectomy
da Vinci® Colectomy
da Vinci® Robotic Surgery
Dressing and Debridement of Wound or Infection
Duodenal Polypectomy
Endoscopy
Enterostomy (Laparoscopic or Open)
Esophagectomy (Esophagogastrostomy, Esophagojejunostomy)
Excision of Anal Tags
Excision of Esophageal Lesion
Excision, Shaving, or Destruction of Skin and Subcutaneous Tissue (incl. Mohs Micrographic Surgery), Tissue Transfer
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 Gallbladder Removal (Cholecystectomy)
Laparoscopic Incisional Hernia Repair
Laparoscopic Liver Tumor Ablation
Laparoscopic Rectal Surgery
Laparoscopic Surgical Procedure
Laparoscopic Umbilical or Ventral Hernia Repair
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
Non Invasive Mechanical Ventilatn 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
Removal of Reproductive Organs (Hysterectomy, Oophorectomy, Salpingectomy, Salpingo-Oophorectomy, Resection of Peritoneal Malignancy)
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 Grafts
Skin Lesion Removal
Small Bowel Surgery
Snare Polypectomy
Soft Tissue Tumor Removal
Spinal Nerve Block
Surgery, Robotic Assisted
Surgical Procedures
Tumor Resection
Vaginal Prolapse Surgery
Ventral Hernia Repair Open
Wound Repair

Insurance Accepted

* Please verify this information when scheduling an appointment.
  • Blue Cross and Blue Shield
  • Cigna
  • Humana
  • United Healthcare
  • Curative PPO Plus
    Curative PPO
    Curative EPO
  • Tricare
  • Aetna
  • Mail Handlers Benefit Plan (MHBP)
  • National (BlueCard) PPO
  • First Health (Coventry Health Care)
  • Medicare
  • HealthyBlue 2.0
  • Emblem Health
  • Open Access
  • MultiPlan PPO
  • Medicaid

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

Patient Satisfaction

Likelihood to recommend Dr. Casillas
4.5
Based on 33 Reviews
5 Stars (28)
4 Stars (0)
3 Stars (1)
2 Stars (1)
1 Star (3)

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Patient Reviews
Jun 28, 2021
Dr. Casillas is a very skilled, knowledgeable surgeon. He takes the time to thoroughly explain procedures and options. His calm demeanor is very reassuring. I was so impressed with him, and so grateful for the excellent outcome of the surgery.
Mary H. — Jun 28, 2021
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Photo: Dr. Mark Casillas, MD
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Dr. Casillas' Office & Staff

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Experience with Dr. Casillas

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  • Hpends appropriate amount of time with patients

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Telehealth Options
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(865) 305-5335

About Me

Specialties*
Colorectal Surgery
General Surgery
Specialties*
  • *Sharecare does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
Education

Education

Medical Education
  • University of Alabama at Birmingham
    2006
Medical Education

Board Certifications

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.

Internship

Internship
  • Brown University
    2007
Internship

Residency

Residency Hospital
  • St. Joseph Mercy Hospital-General Surgery Residency
    2011
Residency Hospital

Fellowship

Fellowship Hospital
  • Indiana School Of Medicine-Colon & Rectal Surgery Residency
    2012
Fellowship Hospital
Common Questions and Answers
Responses are sourced directly from patients.
Does Dr. Casillas communicate via email?
No responses yet.
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Does Dr. Casillas offer telehealth services or virtual visits?
No responses yet.
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No
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Does Dr. Casillas offer an online patient portal?
1 user said yes.
Yes
(1)
No
(0)
Does Dr. Casillas have free onsite parking?
No responses yet.
Yes
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No
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Does Dr. Casillas offer weekend visits?
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Does Dr. Casillas offer evening visits?
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Does Dr. Casillas specialize in working with children or adolescents?
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Does Dr. Casillas specialize in working with seniors?
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Does Dr. Casillas specialize in couples therapy?
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Does Dr. Casillas specialize in working with LGBTQ+ community?
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Does Dr. Casillas accept insurance?
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Frequently Asked Questions

Find contact information here to make an appointment.

A list of accepted insurance providers is available on the Sharecare insurance check. It is always a good idea to verify your insurance when making an appointment.

New patients are generally accepted by Dr. Mark Casillas, MD. To arrange an appointment, call the number on Dr. Casillas' profile.

Dr. Casillas frequently treats the following conditions: Anorectal Fistula and Colorectal Cancer. See more on Sharecare.

Dr. Mark Casillas, MD is affiliated with University of Tennessee Medical Center.

Yes, Dr. Mark Casillas, MD holds board certification in Colon & Rectal Surgery and General Surgery.

Hospital Affiliations

  • University of Tennessee Medical Center

    1924 Alcoa Hwy, Knoxville, TN