MC
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Casillas, Surgeon in Knoxville, TN?
Dr. Mark Casillas, MD is a Surgeon, who primarily practices in Knoxville, TN with 1 additional practice location. Dr. Casillas is fluent in English, and is currently seeing new patients. Dr. Casillas’s practice accepts Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Casillas’s office at (865) 305-5335.
What languages does Dr. Casillas speak?
Dr. Casillas and their clinical team can communicate with patients in the following languages:
English
What conditions does Dr. Casillas treat?
As a Surgeon, Dr. Casillas diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Casillas. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly.
Also known as:
- Other Pre-Procedure Examination
- Various pre-op checks
- Miscellaneous pre-surgery exams
- Other pre-treatment assessments
ICD-10 Codes:
- Z01818: Encounter for other preprocedural examination
Also known as:
- Colon Cancer Screening
- Health Screening
- Colorectal Cancer Screening (PDQ®)
- Screening Tests to Detect Colorectal Cancer and Polyps
- Tests to Detect Colorectal Cancer and Polyps
- Colorectal Cancer Screening
- Colonoscopy Screening
- Bowel Cancer Screening
ICD-10 Codes:
- Z1211: Encounter for screening for malignant neoplasm of colon
Also known as:
- Colorectal Cancer
- Rectal cancer
- Colon cancer
- Bowel cancer
- Malignant neoplasm of rectum
- Malignant neoplasm of sigmoid colon
- Malignant neoplasm of cecum
ICD-10 Codes:
- C20: Malignant neoplasm of rectum
- C187: Malignant neoplasm of sigmoid colon
- C180: Malignant neoplasm of cecum
Also known as:
- Second Degree Hemorrhoids
- Third Degree Hemorrhoids
- Hemorrhoids
- Internal hemorrhoids that prolapse
- Grade 2 hemorrhoids
- Moderate hemorrhoids
- Prolapsed hemorrhoids
- Grade 3 hemorrhoids
- Severe hemorrhoids
ICD-10 Codes:
- K641: Second degree hemorrhoids
- K642: Third degree hemorrhoids
Also known as:
- Anal Fistula
- Anal Dysplasia
- Anal Disorder
- Fistulas
- Perianal Fistula
- Fistula-in-Ano
- Abnormal Anal Tract
- Abnormal anal cells
- Precancerous anal changes
- Anal epithelial dysplasia
ICD-10 Codes:
- K603: Anal fistula
- K6282: Dysplasia of anus
Also known as:
- Ileostomy Care
- Colostomy Care
- Ostomy
- Ileostomy Management
- Small Intestine Stoma Care
- Ileostomy Follow-up
- Stoma Care
- Bowel Diversion Care
- Ostomy Bag Management
ICD-10 Codes:
- Z432: Encounter for attention to ileostomy
- Z433: Encounter for attention to colostomy
Also known as:
- Benign Cecum Polyp
- Benign Ascending Colon Polyp
- Benign Tumor
- Colonic Polyps
- Colon Polyps
- Non-cancerous cecum growth
- Cecal adenoma
- Cecum benign tumor
- Non-cancerous ascending colon growth
- Ascending colon adenoma
- Ascending colon benign tumor
ICD-10 Codes:
- D120: Benign neoplasm of cecum
- D122: Benign neoplasm of ascending colon
Also known as:
- Complete Bowel Incontinence
- Bowel Incontinence
- Full fecal incontinence
- Total loss of bowel control
- Severe accidental bowel leakage
ICD-10 Codes:
- R159: Full incontinence of feces
Also known as:
- Colon Polyps
- Colonic Polyps
- Colorectal polyps
- Bowel polyps
- Intestinal polyps
ICD-10 Codes:
- K635: Polyp of colon
Also known as:
- Pre-Procedure Heart Examination
- Pre-Surgery Cardiac Checkup
- Heart Health Assessment (Before Procedure)
- Cardiovascular Clearance Exam
ICD-10 Codes:
- Z01810: Encounter for preprocedural cardiovascular examination
Also known as:
- Chronic Anal Fissure
- Anal Disorder
- Long-Term Anal Tear
- Persistent Rectal Fissure
- Chronic Fissure in Anus
ICD-10 Codes:
- K601: Chronic anal fissure
Also known as:
- Rectal Prolapse
- Pelvic Floor Disorder
- Rectal Disorder
- Protruding Rectum
- Bowel Prolapse
- Rectal Eversion
ICD-10 Codes:
- K623: Rectal prolapse
Also known as:
- Other Specified Aftercare
- Specific post-op care
- Specialized recovery care
- Follow-up for specific procedures
ICD-10 Codes:
- Z5189: Encounter for other specified aftercare
Also known as:
- Other Anal and Rectal Condition
- Anal Disorder
- Rectal Disorder
- Proctitis
- Anal Disorders
- Rectal Disorders
ICD-10 Codes:
- K6289: Other specified diseases of anus and rectum
What procedures does Dr. Casillas perform?
As a Surgeon, Dr. Casillas performs a variety of medical procedures. This procedure information is derived from anonymized insurance claims and highlights the medical procedures most commonly performed by Dr. Casillas. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly.
Also known as:
- Colonoscopy with Polyp Removal
- Diagnostic Colonoscopy with Biopsy
- Colonoscopy with Biopsy
- Colonoscopy
- Colorectal Cancer Screening Tests
- Flexible Colonoscopy with Biopsy
- Colorectal Polyp Removal
- Hot Biopsy Colonoscopy
- Flexible Colonoscopy with Polypectomy
- Colon Polyp Removal
- Colorectal Lesion Excision
- Flexible Colonoscopy
- Colon Exam with Biopsy
- Lower Endoscopy
- Colon Cancer Screening
- Colon Biopsy
- Large Intestine Scope
- Colorectal Cancer Screening
CPT Codes:
- 45384: Colonoscopy, flexible; with removal of tumor(s), polyp(s), or other lesion(s) by hot biopsy forceps
- 45385: Colonoscopy, flexible; with removal of tumor(s), polyp(s), or other lesion(s) by snare technique
- 45378: Colonoscopy, flexible; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
- 45380: Colonoscopy, flexible; with biopsy, single or multiple
Also known as:
- Removal of Multiple Hemorrhoids
- Hemorrhoidectomy
- Internal and External Hemorrhoid Surgery
- Piles Removal Surgery
CPT Codes:
- 46260: Hemorrhoidectomy, internal and external, 2 or more columns/groups;
Also known as:
- Anal Fistula Surgery
- Fistulectomy
- Fistulotomy
- Anal Fistula Repair
- Perianal Fistula Repair
CPT Codes:
- 46280: Surgical treatment of anal fistula (fistulectomy/fistulotomy); transsphincteric, suprasphincteric, extrasphincteric or multiple, including placement of seton, when performed
- 46270: Surgical treatment of anal fistula (fistulectomy/fistulotomy); subcutaneous
Also known as:
- Anal Biopsy
- Rectal Wall Biopsy
- Anorectal Biopsy
- Anal Tissue Sample
CPT Codes:
- 45100: Biopsy of anorectal wall, anal approach (eg, congenital megacolon)
Also known as:
- Extensive Anal Lesion Removal
- Anal wart removal
- Destruction of anal condyloma
- Anal papilloma treatment
- Anal lesion ablation
CPT Codes:
- 46924: Destruction of lesion(s), anus (eg, condyloma, papilloma, molluscum contagiosum, herpetic vesicle), extensive (eg, laser surgery, electrosurgery, cryosurgery, chemosurgery)
Also known as:
- Removal of Rectal Tumor
- Transanal Rectal Tumor Excision
- Partial Thickness Rectal Tumor Removal
- Rectal Lesion Excision
CPT Codes:
- 45171: Excision of rectal tumor, transanal approach; not including muscularis propria (ie, partial thickness)
Also known as:
- Removal of Anal Skin Tags
- Anal Papillae Excision
- Perianal Skin Tag Removal
- Anorectal Tag Excision
CPT Codes:
- 46230: Excision of multiple external papillae or tags, anus
Also known as:
- Stapled Hemorrhoid Removal
- Internal Hemorrhoid Ligation (Non-Rubber Band)
- Hemorrhoidopexy
- PPH Procedure
- Stapled Hemorrhoidectomy
- Hemorrhoidectomy by ligation
- Internal hemorrhoid removal
- Surgical hemorrhoid treatment
CPT Codes:
- 46947: Hemorrhoidopexy (eg, for prolapsing internal hemorrhoids) by stapling
- 46945: Hemorrhoidectomy, internal, by ligation other than rubber band; single hemorrhoid column/group, without imaging guidance
Also known as:
- Flexible Sigmoidoscopy
- Colorectal Cancer Screening Tests
- Sigmoidoscopy
- Lower colon exam
- Flexible colon scope
- Rectum and lower colon check
CPT Codes:
- 45330: Sigmoidoscopy, flexible; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
Also known as:
- Anal Fissure Removal with Muscle Release
- Fissurectomy
- Sphincterotomy
- Anal Fissure Repair
- Chronic Fissure Surgery
CPT Codes:
- 46200: Fissurectomy, including sphincterotomy, when performed
Also known as:
- Hemorrhoid Removal Surgery
- Hemorrhoidectomy
- Piles Surgery
- Internal and External Hemorrhoid Excision
CPT Codes:
- 46255: Hemorrhoidectomy, internal and external, single column/group;
Also known as:
- Colonoscopy with Injections
- Colonoscopy
- Colorectal Cancer Screening Tests
- Flexible Colonoscopy with Injection
- Colon Scope with Medication
- Therapeutic Colonoscopy
CPT Codes:
- 45381: Colonoscopy, flexible; with directed submucosal injection(s), any substance
Also known as:
- Anal Sphincter Nerve Block
- Internal Anal Sphincter Chemodenervation
- Anal Sphincter Injection
- Botox for Anal Fissure
- Chemical Denervation of Anal Muscle
CPT Codes:
- 46505: Chemodenervation of internal anal sphincter
Also known as:
- Drainage of Perianal Abscess
- Perianal Abscess Incision
- Anal Abscess Drainage
- Superficial Perianal Abscess Treatment
CPT Codes:
- 46050: Incision and drainage, perianal abscess, superficial
Also known as:
- Anal Seton Removal
- Seton Removal
- Anal Marker Removal
- Fistula Seton Removal
CPT Codes:
- 46030: Removal of anal seton, other marker
Also known as:
- Neurostimulator Device Implantation (Peripheral, Sacral, or Gastric)
- Nerve Stimulator Implant
- Sacral Neuromodulation Device
- Gastric Stimulator Placement
- Peripheral Nerve Stimulator
CPT Codes:
- 64590: Insertion or replacement of peripheral, sacral, or gastric neurostimulator pulse generator or receiver, requiring pocket creation and connection between electrode array and pulse generator or receiver
Also known as:
- Sacral Nerve Stimulator Implantation
- Sacral Neuromodulation
- Bladder Stimulator Implant
- Nerve Stimulator for Pelvic Pain
CPT Codes:
- 64561: Percutaneous implantation of neurostimulator electrode array; sacral nerve (transforaminal placement) including image guidance, if performed
Also known as:
- Inserting a Long-Term IV Port (Central Line)
- Tunneled central venous catheter insertion
- Subcutaneous port placement
- Central line with port
CPT Codes:
- 36561: Insertion of tunneled centrally inserted central venous access device, with subcutaneous port; age 5 years or older
Also known as:
- Tunneled Central Venous Catheter Removal
- Central Line Explant
- Port-a-Cath Removal
- Implantable Venous Access Device Removal
- Tunneled Catheter Extraction
CPT Codes:
- 36590: Removal of tunneled central venous access device, with subcutaneous port or pump, central or peripheral insertion
Does Dr. Casillas accept my insurance?
Dr. Casillas accepts most major insurance plans. Important: Please call our office at (865) 305-5335 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Casillas accept in Knoxville, TN?
Dr. Casillas in Knoxville, TN accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
Blue Cross Blue Shield of Michigan
Carpenters Funds Administrative Office (CA)
CVS Health (formerly Aetna)
Express Scripts
Medicare
State of Tennessee
View All Insurances
Where is Dr. Casillas' office located?
Dr. Mark Casillas' Primary Practice
1924 Alcoa Hwy # U56
Knoxville, TN 37920
(865) 305-5335
What is Dr. Casillas's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Casillas's National Provider Identifier (NPI) number is 1245458082.
What common questions do patients ask about Dr. Casillas?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Casillas
What is Dr. Mark Casillas's specialty?
Dr. Casillas is a Surgeon near Knoxville, TN. General surgeons are experts in diagnosing and managing surgical conditions which includes preoperative, operative, and postoperative care, as well as addressing complications. Their expertise include the areas such as the alimentary tract, breast, abdomen, skin and soft tissue, endocrine system, head and neck, pediatric surgery, surgical critical care, surgical oncology, trauma, burns, and vascular surgery. General surgeons increasingly utilize minimally invasive and endoscopic techniques to provide proper care. In addition to this, many general surgeons have expertise in transplantation, plastic, and cardiothoracic surgery. Contact Dr. Casillas to book an appointment today.
Is this Dr. Mark Casillas affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Casillas is affiliated with The University of Tennessee Medical Center which is a Castle Connolly Top Hospital. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
Where can I learn more about Surgeon?
Explore Surgeon with insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is Mark Casillas accepting new patients in Knoxville, TN?
Yes, Dr. Mark Casillas is accepting new patients at this time.
Does Dr. Mark Casillas offer online booking?
Please contact Dr. Casillas's office at (865) 305-5335 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Mark Casillas?
Please contact Dr. Casillas's office at (865) 305-5335 for information regarding telehealth appointment availability or for scheduling assistance.
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