Thomas Kobina Duncan, DO
Surgery Physician · Ventura, CA
Thomas Kobina Duncan, DO is a surgery physician with a practice address in Ventura, California, and NPI 1316097439, issued on Jan 11, 2007. Check the license (California 20A6490, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thomas Kobina Duncan
- Credential
- DO
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- 20A6490 CA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Hillmont Ave Ste 401, Ventura, CA 93003
- Phone
- (805) 652-6201
- Enumerated
- Jan 11, 2007
- Record last updated
- May 20, 2026
- Fax
- (805) 641-4416
- Medicare enrollment
- Enrolled (PECOS I20080326000316); accepts Medicare assignment
- Medical or professional school
- Midwestern University, Chicago College Of Osteopathic Med, 1992
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Also registered at 300 Hillmont Ave Ste 401
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Nathan Oh, D.O.Neurological Surgery Physician1992115778
- Nissar Shah, M.DEndocrinology, Diabetes & Metabolism Physician1407078215
Verify Thomas Kobina Duncan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A6490Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average surgery physician in 2024
11 Medicare Part D claims for 11 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 87.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $206.08
2 payments; by number, the most common kind was food and beverage; the largest payer was PolyNovo North America LLC. The 17,103 providers of this specialty with any payment received $3,513.80 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- County OF VenturaVentura, CA
- Ventura County Surgical AssociatesVentura, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas Kobina Duncan among 3,118 surgery physician records in California
Thomas Kobina Duncan, DO is one of 3,118 surgery physician records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 45% of them.
- NPI issued2007 · 45% of these records are older, 42% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1992 · median 2003 among the 1,901 with a school on file
- Record last updated2026 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in California
There are 3,118 surgery physician records in California.
All 3,118 in California → Every provider in Ventura → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Kurt Blickenstaff, M.D.Ventura, CA 930031437212453
- Anthony Carden, MDVentura, CA 930031184943268
- James Holden, M.D.Ventura, CA 930031720144983
- Gosta Iwasiuk, M.D.Ventura, CA 930031114023249
- Garrett Jones, D.O.Ventura, CA 930031861842932
- Karim Jreije, DOVentura, CA 930031518311091
- Javier Romero, M.D.Ventura, CA 930031700940897
- Michael Salehpour, MDVentura, CA 930031699922344
Common questions
What is Thomas Kobina Duncan, DO's NPI number?
Thomas Kobina Duncan, DO's National Provider Identifier (NPI) is 1316097439, issued on Jan 11, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Kobina Duncan, DO located?
The NPPES record lists a practice address at 300 Hillmont Ave Ste 401, Ventura, CA, 93003. Phone: (805) 652-6201. Providers update this record themselves, so call before visiting.
How can I verify Thomas Kobina Duncan, DO's license?
NPPES lists California license number 20A6490, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas Kobina Duncan, DO prescribe under Medicare Part D?
In 2024, Thomas Kobina Duncan, DO had 11 Medicare Part D claims for 11 beneficiaries; the average among surgery physician prescribers was 147. Part D covers Medicare prescriptions only.
What is Thomas Kobina Duncan, DO's MIPS final score?
The 2023 MIPS final score is 87.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.