Summary

Dr. Casillas graduated from the University of Alabama School of Medicine in 2006. He works in Knoxville, TN and 2 other locations and specializes in Colorectal Surgery and Surgery. Dr. Casillas is affiliated with University Of Tennessee Medical Center, Fort Sanders Regional Medical Center and University Of Tennessee Medical Center Heart Hospital.

Quick Facts

  • accepting new patients
  • 4.4
  • 20 years of experience
  • speaks English
  • St Joseph Mercy Hospital - Ann Arbor
  • 4 written reviews
  • 2 specialties
  • 33 areas of expertise
  • 3 hospital affiliations
  • 3 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. Mark Anthony Casillas has 3 locations

University Colon And Rectal Surgery

1934 Alcoa Hwy Ste 370Knoxville, TN 37920
Mon8:00 am - 4:30 pm
Tue8:00 am - 4:30 pm
Wed8:00 am - 4:30 pm
Thu8:00 am - 4:30 pm
Fri8:00 am - 4:30 pm
SatClosed
SunClosed

University Of Tennessee Medical Center Heart Hospital

1924 Alcoa HwyKnoxville, TN 37920

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Dr. Mark Anthony Casillas JR., MD
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Dr. Mark Anthony Casillas JR., MDDr. David Garrett Schutter, MDDr. Amy Ann Howk, MDDr. James Walter Taylor, MD
Colorectal SurgerySurgerySurgerySurgery
Accepts New Patients
4.4 
4.8 
20 Years of Experience 12 Years of Experience 8 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English
Knoxville , TNPowell , TNKnoxville , TNKnoxville , TN
Med School: University Of Alabama School Of Medicine Med School: University Of Kansas School Of Medicine Med School: University Of Tennessee Health Science Center College Of Medicine
Current Profile
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Insurance Plans Accepted by Dr. Mark Anthony Casillas

  • Accepts Medicare
  • Accepts Medicaid

Medical Specialties

Dr. Mark Anthony Casillas has the following 2 specialties

Specialty Expertise

Dr. Mark Anthony Casillas has the following 33 areas of expertise

  • Anal Cancer (Anus Neoplasms)
  • Anal Itching (Pruritus Ani)
  • Anal Ulcer (Fissure in Ano)
  • Clinical Research
  • Colon Cancer
  • Colon Diseases (Sigmoid Diseases)
  • Colon Tumor (Adenomatous Polyps)
  • Colonic Diverticulitis
  • Colonic Polyps
  • Colonoscopy
  • Colorectal Cancer
  • Colostomy
  • Constipation
  • Crohn's Disease
  • Diverticulitis
  • Fecal Incontinence
  • Gastrointestinal Diseases (GI Diseases)
  • Gastrointestinal Endoscopy
  • Gastrointestinal Hemorrhage
  • Ileostomy
  • Inflammatory Bowel Diseases (IBD)
  • Intestinal Polyposis
  • Laparoscopic General Surgery
  • Laparoscopic Surgery (Laparoscopy)
  • Laproscopic Surgery (Laparoscopy)
  • Ostomy
  • Rectal Cancer
  • Rectal Diseases
  • Rectal Fistula
  • Rectal Prolapse
  • Rectovaginal Fistula
  • Surgery
  • Ulcerative Colitis

Certifications, License, & Education

20 Years Experience

Dr. Mark Anthony Casillas holds an expired medical license in the state of Tennessee.

Medical License

Medical Doctor with an expired medical license in the state of Tennessee that expired in 2026.

Education & Training

Residency

Completed their residency at St Joseph Mercy Hospital - Ann Arbor.

Medical School

Graduated from University Of Alabama School Of Medicine in 2006.

NPI Number

Dr. Casillas' NPI number is 1245458082.

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Frequently Asked Questions

Is Dr. Mark Casillas accepting new patients?
Dr. Mark Casillas is accepting new patients on Vitals. View Dr. Mark Casillas's profile on Vitals to make an appointment.
Which hospitals is Dr. Mark Casillas affiliated with?
Dr. Mark Casillas is affiliated with University Of Tennessee Medical Center, Fort Sanders Regional Medical Center, and University Of Tennessee Medical Center Heart Hospital.
Where is Dr. Mark Casillas's office located?
Dr. Mark Casillas's office is located at 1934 Alcoa Hwy Ste 370, Knoxville, TN, 37920.
Does Dr. Mark Casillas accept my insurance?
You can see the insurance plans that Dr. Mark Casillas accepts on their Vitals profile.
What languages does Dr. Mark Casillas speak?
Dr. Mark Casillas speaks English.

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