Dr. Theodore Seth Thomas, MD
- Medicare services, 2024
- 211
- Medicare patients, 2024
- 35
- Part D claims, 2024
- 297
- MIPS score, 2024
- 88
- Hospital affiliations
- 2
- Practice address
- 4500 Memorial Drive, Belleville, IL 62226
- Practice phone
- Call (618) 233-7750
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Thomas' professional email, personal email and mobile number
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Dr. Theodore Seth Thomas is a medical oncologist in Belleville, Illinois
Dr. Thomas practices at Memorial Hospital in Belleville in Belleville, Illinois, part of BJC Health.
Dr. Thomas' NPI, 1326359837, was assigned on June 30, 2010. Dr. Thomas graduated from University of Missouri, Columbia School of Medicine in 2010. Dr. Thomas holds Missouri license 2012022392.
- NPI
- 1326359837NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2860635380
- NPI enumeration date
- June 30, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (618) 233-7750
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Theodore Seth Thomas practices at Memorial Hospital in Belleville in Belleville, Illinois
Dr. Thomas' primary practice is Memorial Hospital in Belleville, at 4500 Memorial Drive, Belleville, IL 62226 in St. Clair County. The practice phone is (618) 233-7750.
- Memorial Hospital in Belleville4500 Memorial Drive, Belleville, IL 62226 · St. Clair CountyPhone(618) 233-7750
Source: Dmand AI Affiliation Data
Dr. Theodore Seth Thomas is affiliated with 5 sites of care and 2 medical groups
Dr. Thomas' primary practice is Memorial Hospital in Belleville in Belleville, Illinois, part of BJC Health. Dr. Thomas is also affiliated with Barnes-Jewish Hospital. The medical group on file is WashU Medicine Psychiatry. Dmand AI also links Dr. Thomas to 2 more group practices and clinics, 1 hospice and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Theodore Seth Thomas' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Thomas practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Memorial Hospital in Belleville | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Theodore Seth Thomas is one of 153 medical oncologists in Illinois
Medical oncology is Dr. Thomas' primary specialty in the NPI Registry, under taxonomy code 207RX0202X. Dr. Thomas is licensed in Missouri.
Specialties and state licenses
- Medical oncology, MissouriPrimary
Medical oncologists near Dr. Thomas
Counts of medical oncologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Theodore Seth Thomas billed Medicare for 211 services in 2024
CMS data shows 211 Medicare services from Dr. Thomas across 4 procedure codes in 2024, all of them office visits, for 35 Medicare patients. Medicare paid $26,884 for them. Every service was in an office.
Dr. Thomas' Medicare services by type, 2016 to 2024
- 2016
- 2024
- Office and hospital visits
- 2016: 252024: 211744%
Dr. Thomas compared with the Illinois median for medical oncologists, 2024
- Dr. Thomas
- Illinois median
- Medicare services
- 211vs 67169% below
- Medicare patients
- 35vs 23085% below
- Part D claims
- 198vs 34543% below
Medians across 140 medical oncologists in Illinois with Dmand AI profiles that report each measure.
Dr. Thomas' most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Theodore Seth Thomas treated 35 Medicare patients in 2024, average age 73
CMS counts 35 Medicare patients who saw Dr. Thomas in 2024. The largest group is 75 to 84, with 15 patients. 75% of them have cancer, and 75% have high blood pressure. Their average risk score is 1.66, 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. Thomas' median patient age at 73, with 42% women.
Dr. Thomas' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Thomas' Medicare patients by sex, 2024
- Women1646%
- Men1954%
Chronic conditions among Dr. Thomas' Medicare patients, 2024
- Cancer75%
- High blood pressure75%
- High cholesterol75%
- COPD63%
- Ischemic heart disease57%
- Tobacco use51%
- Arthritis49%
- Chronic kidney disease37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Thomas' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women42%
- Men58%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Theodore Seth Thomas wrote 297 Medicare Part D claims in 2024
In 2024, Dr. Thomas wrote 297 Medicare Part D claims for 57 patients. 98% of them were for generic drugs. CMS names the drug for 198 of them, across 6 drugs with 11 or more claims each, at $1,912 in total drug cost.
Dr. Thomas' Part D claims by kind of drug, 2024
- Generic290 claims98%
- Brand-name and other7 claims2%
Dr. Thomas' most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Thomas' Part D claims, 2024
- Opioids11%33 of 297 claims
- Antibiotics4%12 of 297 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Theodore Seth Thomas scored 88 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 88 out of 100 for Dr. Thomas for performance year 2024, reported as part of a group. Dr. Thomas accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Thomas' MIPS scores, performance year 2024
- 88of 100Final score
- 76.1of 100Quality
- 99of 100Promoting Interoperability
- 40of 100Improvement Activities
- 76of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Theodore Seth Thomas received $340 in industry payments from 2016 to 2017
CMS Open Payments shows 4 general payments to Dr. Thomas from 3 drug and device companies from 2016 to 2017. Education make up the largest share, 100% of the total. Amgen Inc. paid the most, $160.
General payments to Dr. Thomas by program year, 2016 to 2017
Companies that paid Dr. Thomas the most, 2016 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Theodore Seth Thomas graduated from University of Missouri, Columbia School of Medicine
Dr. Thomas graduated from University of Missouri, Columbia School of Medicine in 2010.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Theodore Seth Thomas's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Theodore Seth Thomas
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Theodore Seth Thomas' NPI number?
Dr. Theodore Seth Thomas' NPI number is 1326359837. It was assigned on June 30, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Theodore Seth Thomas?
Dr. Theodore Seth Thomas is a medical oncologist in Belleville, Illinois. The primary specialty in the NPI Registry is Medical Oncology Physician (taxonomy code 207RX0202X).
Where does Dr. Theodore Seth Thomas practice?
Dr. Thomas practices at 4500 Memorial Drive, Belleville, IL 62226. Dr. Thomas' primary practice is Memorial Hospital in Belleville in Belleville, Illinois, part of BJC Health. Dmand AI also links Dr. Thomas to 2 group practices and clinics, 1 hospice and 1 medical group.
What is Dr. Theodore Seth Thomas' office phone number?
The practice phone on file for Dr. Thomas is (618) 233-7750.
What is Dr. Theodore Seth Thomas' medical license number?
Dr. Thomas holds Missouri license 2012022392.
Which hospitals is Dr. Theodore Seth Thomas affiliated with?
Dr. Thomas practices at Memorial Hospital in Belleville in Belleville, Illinois. Dr. Thomas is also affiliated with Barnes-Jewish Hospital.
What medical group is Dr. Theodore Seth Thomas part of?
Dr. Thomas is linked to WashU Medicine Psychiatry. Dmand AI links Dr. Thomas to 1 more medical group.
Does Dr. Theodore Seth Thomas accept Medicare?
Yes. CMS data shows Dr. Thomas billed Medicare for 211 services in 2024, and Dr. Thomas accepts Medicare assignment.
What is Dr. Theodore Seth Thomas' MIPS score?
Dr. Thomas' MIPS final score for performance year 2024 is 88 out of 100, reported as part of a group.
How many Medicare patients does Dr. Theodore Seth Thomas see?
CMS counts 35 Medicare patients who saw Dr. Thomas in 2024, with an average age of 73.
Show 5 more questionsShow fewer questions
What services does Dr. Theodore Seth Thomas bill to Medicare?
In 2024, Dr. Thomas' most billed Medicare services were office visit, established patient (99215), office visit, established patient (99214) and office visit, new patient (99205).
Where did Dr. Theodore Seth Thomas go to medical school?
Dr. Thomas graduated from University of Missouri, Columbia School of Medicine in 2010.
What drugs does Dr. Theodore Seth Thomas prescribe most?
In 2024 Medicare Part D data, Dr. Thomas' most prescribed drugs by claims were Prochlorperazine Maleate, Dexamethasone and Ondansetron HCl.
Has Dr. Theodore Seth Thomas received payments from drug or device companies?
CMS Open Payments shows $340 in general payments to Dr. Thomas from 3 companies from 2016 to 2017. The largest total came from Amgen Inc.
How long has Dr. Theodore Seth Thomas been practicing?
Dr. Thomas graduated from medical school in 2010, 16 years ago.
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