
Overview
My special interests include colon and rectal cancer, surgical treatment of inflammatory bowel and diverticular diseases, minimally invasive surgical techniques, including advanced laparoscopic and robotic surgery, and treatment of diseases and disorders of the anal canal. My passion is to provide specialized and individualized care to each one of my patients. I am part of a large, close family and enjoy spending time with them. My hobbies include gardening, cooking/baking, and spending as much time as possible outdoors. I grew up in Davidson County, North Carolina.
Dr. Thomas is rated as an Experienced provider by MediFind in the treatment of Proctitis. Her top areas of expertise are Familial Colorectal Cancer, Anal Cancer, Genital Warts, Gastroesophageal Junction Cancer, and Small Bowel Resection.
Insurance
Accepted insurance can change. Please verify directly with the provider.
Accepted insurance plans:
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- PPO
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- PPO
Accepted plan types not found. Please verify directly with the provider.
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- OTHER COMMERCIAL
- OTHER MEDICARE
- OTHER MEDICARE PART D
- PPO
- HMO
- INDEMNITY
- POS
- PPO
- EPO
- POS
- PPO
- OTHER MEDICAID
- STATE MEDICAID
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER MEDICARE PART D
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER COMMERCIAL
- OTHER MEDICARE
- OTHER MEDICARE PART D
- HMO
- POS
- OTHER COMMERCIAL
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER MEDICARE
- OTHER MEDICARE PART D
Locations
1002 N Church St, Greensboro, NC 27401
Davis Ambulatory Surgical Center
I am a colorectal surgeon, which means that I am a surgeon of the abdomen. I treat patients with diseases related to the gastrointestinal tract, specifically with diverticulitis, inflammatory bowel disease, colitis, Crohn’s disease, ulcerative colitis, and also GI cancers, such as colon cancer, rectal cancer, and anal cancer. I try to engage with the patient as much as I can. I use as many visual things as possible, pictures or diagrams, to help explain conditions or treatments a little easier. The benefit of coming to Duke is that we have multiple specialties, so if a diagnosis is unclear to me, I have a team of colleagues who help me and patients can be comfortable knowing a team of specialists can help find a solution. Dr. Lan is rated as an Advanced provider by MediFind in the treatment of Proctitis. His top areas of expertise are Proctitis, Familial Colorectal Cancer, Rectal Prolapse, Bladder Reconstruction, and Ureteroscopy.
Wake Forest University Health Sciences
Gregory Waters is a General Surgeon in Winston Salem, North Carolina. Dr. Waters is rated as an Advanced provider by MediFind in the treatment of Proctitis. His top areas of expertise are Rectal Prolapse, Familial Colorectal Cancer, Anal Cancer, Bladder Reconstruction, and Ileostomy. Dr. Waters is currently accepting new patients.
Reza Rahbar-Semnani is a Colorectal Surgeon and a General Surgeon in Cary, North Carolina. Dr. Rahbar-Semnani is rated as an Advanced provider by MediFind in the treatment of Proctitis. His top areas of expertise are Rectal Prolapse, Familial Colorectal Cancer, Encopresis, Hernia Surgery, and Bladder Reconstruction. Dr. Rahbar-Semnani is currently accepting new patients.
Areas of Expertise
MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.
Learn more about MediFind’s expert tiers
- Distinguished
- Familial Colorectal CancerDr. Thomas isDistinguished. Learn about Familial Colorectal Cancer.
- Advanced
- Anal CancerDr. Thomas isAdvanced. Learn about Anal Cancer.
- Genital WartsDr. Thomas isAdvanced. Learn about Genital Warts.
- Experienced
- Anal FissureDr. Thomas isExperienced. Learn about Anal Fissure.
- Bowel IncontinenceDr. Thomas isExperienced. Learn about Bowel Incontinence.
- Congenital Diaphragmatic HerniaDr. Thomas isExperienced. Learn about Congenital Diaphragmatic Hernia.
- Diverticular DiseaseDr. Thomas isExperienced. Learn about Diverticular Disease.
- EncopresisDr. Thomas isExperienced. Learn about Encopresis.
- Gastroesophageal Junction CancerDr. Thomas isExperienced. Learn about Gastroesophageal Junction Cancer.

