Dr. Thomas Kobina Duncan, DO

Dr. Duncan practices at Ventura County Medical Center in Ventura, California, part of Ventura County Health Care Agency.

Dr. Duncan's NPI, 1316097439, was assigned on January 11, 2007. Dr. Duncan graduated from Chicago College of Osteopathic Medicine at Midwestern University in 1992. Dr. Duncan holds Georgia license 56536.

Dr. Duncan's primary practice is Ventura County Medical Center, at 300 Hillmont Avenue, Ventura, CA 93003 in Ventura County. The practice phone is (805) 652-6075.

Dr. Duncan's primary practice is Ventura County Medical Center in Ventura, California, part of Ventura County Health Care Agency. The medical group on file is Ventura County Medical Center. Dmand AI also links Dr. Duncan to 1 more community health center, 1 therapy and rehab clinic and 1 medical group, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Duncan practices, 3 sites in all. Vendor and product names are available with a free account.

Surgery is Dr. Duncan's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Duncan is board certified in surgery by the American Board of Surgery. Dr. Duncan is licensed in Georgia.

Dmand AI lists abdominal adhesion surgery, gallbladder removal, gastrointestinal obstruction, groin hernia surgery, mastectomy and non-surgical back problems among the conditions Dr. Duncan treats.

CMS data shows 72 Medicare services from Dr. Duncan across 3 procedure codes in 2024, for 64 Medicare patients. Medicare paid $7,736 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 64 Medicare patients who saw Dr. Duncan in 2024. The largest group is 65 to 74, with 31 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 58% are also on Medicaid. Their average risk score is 1.71, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Duncan's median patient age at 51, with 52% women.

In 2024, Dr. Duncan wrote 11 Medicare Part D claims for 11 patients. 100% of them were for generic drugs. They cover 1 drug, with $33 in total drug cost.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 86 out of 100 for Dr. Duncan for performance year 2024, reported as part of a group. Dr. Duncan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)

Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)

Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)

Mastectomy: 1 to 10 procedures (CMS shows small counts as a range)

Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)

Dmand AI links 16 papers to Dr. Duncan, published from 2018 to 2025. 2024 was the busiest year, with 2. The most frequent topics are Betacoronavirus, Coronavirus Infections and COVID-19. Dr. Duncan has published most often in Ann Surg. Dr. Duncan's most frequent co-authors are Deborah A. Kuhls, MD, Ronald M. Stewart, MD and Jessica L. Weaver, MD.

CMS Open Payments shows 56 general payments to Dr. Duncan from 19 drug and device companies from 2016 to 2025. Education make up the largest share, 61% of the total. Intuitive Surgical, Inc. paid the most, $11,636.

Dmand AI lists 26 awards for Dr. Duncan, most recently Award in appreciation of dedication, commitment, and exceptional leadership as chief of staff in 2018. Dr. Duncan serves on Development Committee of Eastern Association for the Surgery of Trauma, Eastern Association for the Surgery of Trauma Board and American College of Surgeons Committee on Trauma Injury Control and Violence Prevention Committee.

Dr. Duncan graduated from Chicago College of Osteopathic Medicine at Midwestern University in 1992. Dr. Duncan is a member of AAST, ACS and Eastern Association for the Surgery of Trauma.

Dr. Duncan is in network with 15 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.