Thomas Kobina Duncan, DO

Primary specialty

Surgery PhysicianTaxonomy code 208600000X

License

20A6490 Issued in CA

Practice address

300 Hillmont Ave Ste 401
Ventura, CA 93003-1651

Phone

(805) 652-6201

Fax

(805) 641-4416

NPI assigned

Jan 11, 2007

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in CA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

General Surgery

Education

Midwestern University, Chicago College of Osteopathic Med, 1992

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Ventura County Surgical AssociatesGroup PAC ID 7618397159, 11 clinicians

County of VenturaGroup PAC ID 7911810171, 340 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Ventura County Medical Center Hospital, Ventura, CA, CCN 050159

Merit-based Incentive Payment System (MIPS)

Final score

86.02 of 100Reported as group

Quality

64.51

Promoting interoperability

100

Improvement activities

40

Cost

72.21

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: thomas.duncan@cernerurl.com

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• County of Ventura

  dba Ventura County Medical Center

  • General Acute Care Hospital
  • Ventura, CA
  • NPI 1629167457
  Medicare reassignment Care Compare group NPD
• Ventura County Surgical Associates

  • Surgery Physician
  • Ventura, CA
  • NPI 1740892686
  Medicare reassignment Care Compare group NPD
• County of Ventura

  dba Conejo Valley Family Medical Group FQHC

  • Federally Qualified Health Center (FQHC)
  • Thousand Oaks, CA
  • NPI 1316188253
  NPD
• County of Ventura

  dba VCBH - Simi Valley Youth & Family Mental Health

  • Community/Behavioral Health Agency
  • Simi Valley, CA
  • NPI 1609098243
  NPD
• Northside Hospital, Inc.

  dba Northside Hospital Duluth

  • General Acute Care Hospital
  • Duluth, GA
  • NPI 1790715381
  NPD (past)
• Northside Hospital, Inc.

  dba Northside Hospital Gwinnett

  • General Acute Care Hospital
  • Lawrenceville, GA
  • NPI 1952340994
  NPD (past)

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• County of Ventura

  dba Ventura County Medical Center

  • General Acute Care Hospital
  • Ventura, CA
  • NPI 1629167457
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1168473600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1779235200000",
    "number": "1316097439",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "300 HILLMONT AVE STE 401",
            "city": "VENTURA",
            "state": "CA",
            "postal_code": "930031651",
            "telephone_number": "805-652-6201",
            "fax_number": "805-641-4416"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 HILLMONT AVE STE 401",
            "city": "VENTURA",
            "state": "CA",
            "postal_code": "930031651",
            "telephone_number": "805-652-6201",
            "fax_number": "805-641-4416"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DUNCAN",
        "first_name": "THOMAS",
        "middle_name": "KOBINA",
        "credential": "DO",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-01-11",
        "last_updated": "2026-05-20",
        "certification_date": "2026-05-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208600000X",
            "taxonomy_group": "",
            "desc": "Surgery",
            "state": "CA",
            "license": "20A6490",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "Thomas.duncan@cernerurl.com",
            "affiliation": "N",
            "endpointDescription": "Cerner address",
            "use": "HIE",
            "useDescription": "Health Information Exchange (HIE)",
            "contentType": "CSV",
            "contentTypeDescription": "CSV",
            "address_1": "300 Hillmont Ave Ste 401",
            "city": "Ventura",
            "state": "CA",
            "country_code": "US",
            "postal_code": "930031651",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Danielle Duggan
• Jonathan Walter Dukes, M.D.
• Marc H Dumais, DDS
• Miles Lee Dumosch, DPT
• Baylor Duncan, LMFT
• Thomas J Dunlop, M.D.
• Jessica Goldenberg Dunne, D.D.S.
• Daniel Minh Duong, DO
• Jocelyn Ragamat Duong, REGISTERED NURSE
• Roxanne Duong, DO

• Surgery Physician in Ventura, CA
• Providers in Ventura, CA by specialty
• Surgery Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 20, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.