Theodore Seth Thomas, MD

Primary specialty

Medical Oncology PhysicianTaxonomy code 207RX0202X

License

036166718 Issued in IL

Practice address

915 N Grand Blvd
Saint Louis, MO 63106-1621

Phone

(314) 652-4100

NPI assigned

Jun 30, 2010

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Other identifiers 1

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in MO, IL2 enrollments

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 2

Specialty

Internal Medicine

Education

University of Missouri, Columbia School of Medicine, 2010

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Washington University Physicians in Illinois IncGroup PAC ID 4789945163, 168 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Hospice of Southern Illinois, Inc Hospice, Belleville, IL, CCN 141504
• Memorial Hospital Hospital, Belleville, IL, CCN 140185
• Barnes Jewish Hospital Hospital, Saint Louis, MO, CCN 260032

Merit-based Incentive Payment System (MIPS)

Final score

88.01 of 100Reported as group

Quality

76.14

Promoting interoperability

99

Improvement activities

40

Cost

76.43

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

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.

• Washington University Physicians in Illinois, Inc

  • Multi-Specialty Clinic/Center
  • O'Fallon, IL
  • NPI 1477076263
  Medicare reassignment Care Compare group NPD
• Washington University

  • Multi-Specialty Clinic/Center
  • Saint Louis, MO
  • NPI 1992746903
  Medicare reassignment
• Washington University Physicians in Illinois, Inc

  • Multi-Specialty Clinic/Center
  • Saint Louis, MO
  • NPI 1457203135
  NPD
• Washington University Physicians in Illinois, Inc

  • Multi-Specialty Clinic/Center
  • Alton, IL
  • NPI 1760946156
  NPD

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

• Barnes Jewish Hospital

  • General Acute Care Hospital
  • Saint Louis, MO
  • NPI 1649299827
  Care Compare affiliation
• Hospice of Southern Illinois, Inc.

  • Community Based Hospice Care Agency
  • Belleville, IL
  • NPI 1720081805
  Care Compare affiliation
• Protestant Memorial Medical Center, Inc.

  dba Memorial Hospital

  • General Acute Care Hospital
  • Belleville, IL
  • NPI 1982796181
  Care Compare affiliation

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

{
    "created_epoch": "1277856000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1770076800000",
    "number": "1326359837",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "915 N GRAND BLVD",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631061621",
            "telephone_number": "314-652-4100",
            "fax_number": "314-289-6320"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "915 N GRAND BLVD",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631061621",
            "telephone_number": "314-652-4100"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1418 Cross St",
            "address_2": "Div IM Medical Oncology, Ste 180",
            "address_purpose": "LOCATION",
            "city": "Shiloh",
            "state": "IL",
            "postal_code": "622692914",
            "country_code": "US",
            "telephone_number": "800-647-2098",
            "fax_number": "314-362-3192",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "THOMAS",
        "first_name": "THEODORE",
        "middle_name": "SETH",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2010-06-30",
        "last_updated": "2026-02-03",
        "certification_date": "2026-02-03",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RX0202X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Medical Oncology",
            "state": "IL",
            "license": "036166718",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "036166718",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "200008314",
            "state": "MO"
        }
    ],
    "endpoints": [
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://epicproxy.et0965.epichosted.com/FHIRProxy/api/FHIR/DSTU2/",
            "affiliation": "Y",
            "affiliationName": "Washington University",
            "address_1": "1418 Cross St",
            "address_2": "Div IM Medical Oncology, Ste 180",
            "city": "Shiloh",
            "state": "IL",
            "country_code": "US",
            "postal_code": "622692914",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Shameika M Thomas
• Sheby Thomas, AA-S
• Stephanie Renea Thomas, PHARMD
• Talya Thomas
• Tamera Thomas, DDS
• Yuliya Thomas
• Emily S Thomason, LPC
• Kayla Mae Thomason, DO
• Alison Deremigis Thomasson, M.D.
• Jeffrey L Thomasson, M.D.

• Medical Oncology Physician in Saint Louis, MO
• Providers in Saint Louis, MO by specialty
• Medical Oncology Physician in Missouri

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 3, 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.