William T. Clarke, MD, MSc
Gastroenterologist
My Locations
About Me
I am a gastroenterologist who sees patients with a variety of issues involving the esophagus, stomach, small intestine, and colon. I specialize in inflammatory bowel diseases, including ulcerative colitis and Crohn’s disease. Additionally, I perform procedures such as colonoscopy and upper endoscopy. Colorectal cancer screening and prevention is an important part of my work as a gastroenterologist. I chose my specialty for the ability to establish long-term relationships with patients and treat chronic diseases with new life-changing therapies. I believe in providing holistic care with a patient-centered approach that incorporates the latest research and a team of specialists. Outside of work, I enjoy spending time with my family, hiking, traveling, and baking.
- Assistant Professor of Medicine, Medicine, Gastroenterology 2020
Call for an Appointment
Training and Education
Clinical Focus and Research
- Papamichael, Konstantinos, William T. Clarke, Niels Vande Casteele, Katharine A. Germansky, Joseph D. Feuerstein, Gil Y. Melmed, Corey A. Siegel, Peter M. Irving, and Adam S. Cheifetz. “Comparison of Assays for Therapeutic Monitoring of Infliximab and Adalimumab in Patients With Inflammatory Bowel Diseases.” Clin Gastroenterol Hepatol 19, no. 4 (April 2021): 839-841.e2. https://doi.org/10.1016/j.cgh.2020.03.002.
- Clarke, William T., Venkata R. Satyam, David I. Fudman, Samantha Zullow, Kashika G. Goyal, Katerina L. Byanova, Christopher Huang, and Joseph D. Feuerstein. “Antibiotic prophylaxis and infectious complications in patients on peritoneal dialysis undergoing lower gastrointestinal endoscopy.” Gastroenterol Rep (Oxf) 8, no. 5 (October 2020): 407–9. https://doi.org/10.1093/gastro/goaa017.
- Papamichael, Konstantinos, Valerio J. Thomas, Andrea Banty, William T. Clarke, Katharine A. Germansky, Sarah N. Flier, Joseph D. Feuerstein, Gil Y. Melmed, and Adam S. Cheifetz. “Clinical Impact of Corrections to Infliximab and Adalimumab Monitoring Results with the Homogeneous Mobility Shift Assay.” J Clin Med 9, no. 9 (September 2, 2020). https://doi.org/10.3390/jcm9092840.
Insurance Accepted
Duke Health contracts with most major health insurance carriers and transplant networks, including the ones listed below.
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Aetna
- Aetna Choice POS, Aetna Choice POS II
- Aetna Elect Choice HMO, Aetna Open Access Elect Choice
- Aetna Health Network Only, Aetna Health Network Option
- Aetna HMO
- Aetna Limited Benefit Insurance PPO
- Aetna Managed Choice POS
- Aetna Medicare Assure Plan (HMO D-SNP)
- Aetna Medicare Eagle Plan (PPO)
- Aetna Medicare Essential Plan (PPO)
- Aetna Medicare Value Plan (HMO)
- Aetna Open Access HMO, Open Access Aetna Select, Aetna Open Access Managed Choice
- Aetna Open Choice PPO
- Aetna PCP Coordinated POS Plan
- Aetna Quality Point of Service (QPOS)
- Aetna Select HMO
- Aetna Traditional Choice
- Aetna Voluntary Indemnity Group Plan
- Aetna Whole Health – Duke WakeMed WKCC
- Aetna/CVS Health
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Ambetter
- Ambetter of North Carolina
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Blue Cross Blue Shield of NC
- Blue Advantage
- Blue Medicare (HMO, PPO)*
- Blue Options (123, PPO, HSA)
- Blue Select
- NC State Employees Health Plan
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*Duke HomeCare and Hospice does not participate in the plan.
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Cigna
- Cigna Behavioral Health (*Limited eligibility)
- Cigna Choice Plus
- Cigna Connect Individual Family Plan
- Cigna Open Access
- Cigna Open Access Plus
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*Please call Cigna Behavioral Heath to see if the provider is participating in your plan.
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Duke Group Plans
- Duke Basic
- Duke Select
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Experience Health
- Experience Health Medicare Advantage (HMO) Plan
- Gateway Health Alliance
- Healthgram
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Humana
- Humana Choice (PPO)
- Humana Choice - Medicare Advantage (PPO)
- Humana ChoiceCare - Medicare Advantage (PPO)
- Humana Gold Choice - Medicare Advantage (PFFS)
- Humana Gold Plus - Medicare Advantage (HMO)
- Humana Medicare Advantage Group Plan - NC State Retirees
- MedCost
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Medicare
- First Medicare Direct
- Medicare Part A
- Medicare Part B
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NC Medicaid
- AmeriHealth Caritas North Carolina
- Carolina Complete Health
- Healthy Blue
- NC Medicaid Direct
- WellCare of North Carolina
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TRICARE
- TRICARE Prime
- TRICARE Prime Remote
- TRICARE Select
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United Healthcare
- AARP Medicare Advantage Plan 2 (HMO-POS)
- AARP Medicare Complete (HMO, PPO)*
- AARP Medicare Complete Essential (HMO)*
- All Savers Alternate Funding
- All Savers Fully Insured
- United Healthcare (HMO, PPO, POS)**
- United Healthcare Charter/Charter Balance/Charter Plus
- United Healthcare Choice/Choice Plus
- United Healthcare Core/Core Essential
- United Healthcare Navigate/Navigate Plus/Navigate Balanced
- United Healthcare Option PPO
- United Healthcare Passport Connect Choice/Choice Plus
- United Healthcare Passport Connect Options PPO
- United Healthcare Select/Select Plus
- United Healthcare Shared Services - Harvard Pilgrim/UHC Options PPO Network
- United Medical Resources (UMR)
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*Duke HomeCare and Hospice and mental health providers do not participate with the plan.
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**Duke Health does not participate in UHC plans on the Health Insurance Marketplace.
Before scheduling your appointment, we strongly recommend you contact your insurance company to verify that the Duke Health location or provider you plan to visit is included in your network. Your insurance company will also be able to inform you of any co-payments, co–insurances, or deductibles that will be your responsibility. If you proceed in scheduling an appointment and your health insurance benefits do not participate with Duke, your out of pocket liability may be higher. We will contact you regarding your coverage and patient liability. If you are uninsured, learn more about our financial assistance policy.