Jacob Samuel Witt, M.D.
Radiation Oncology Physician · O Fallon, IL
Jacob Samuel Witt, M.D. is a radiation oncology physician with a practice address in O Fallon, Illinois, and NPI 1891157871, issued on Mar 28, 2016. Check the license (Illinois 036150707, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Jacob Samuel Witt
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- 036150707 IL
Self-reported in NPPES; status is on the state search - Practice location
- 321 Regency Park Ste 100, O Fallon, IL 62269
- Phone
- (618) 416-7970
- Enumerated
- Mar 28, 2016
- Record last updated
- Oct 2, 2025
- Fax
- (618) 416-7971
- Medicare enrollment
- Enrolled (PECOS I20191016001815); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 277 in Illinois → Look up another NPI →
Also registered at 321 Regency Park Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rachael Demattei, APRNNurse Practitioner1891443289
- Bachir Farah, M.D.Hematology & Oncology Physician1336370915
- Justin Floyd, DOMedical Oncology Physician1629164678
- Bassam Maalouf, M.D.Hematology & Oncology Physician1720173438
- Ryan Mueller, MDRadiation Oncology Physician1912571654
- Julianne Tomac, DNP, FNP-CFamily Nurse Practitioner1245018944
Verify Jacob Samuel Witt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036150707Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average radiation oncology physician in 2024
372 Medicare Part D claims for 118 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims. 58 claims were for opioids.
Most prescribed
- Tamsulosin Hcl60 claims
- Lidocaine Hcl Viscous46 claims
- Dexamethasone34 claims
- Hydrocodone-Acetaminophen30 claims
- Lorazepam26 claims
- Mometasone Furoate22 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.
Industry payments in 2024: $2,510.76
123 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 3,275 providers of this specialty with any payment received $1,897.85 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 one group practice
- Cancer Care Specialists OF Central Illinois SCO Fallon, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jacob Samuel Witt among 277 radiation oncology physician records in Illinois
Jacob Samuel Witt, M.D. is one of 277 radiation oncology physician records with a practice address in Illinois. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 79% of them.
- NPI issued2016 · 79% of these records are older, 19% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2016 · median 2004 among the 184 with a school on file
- Record last updated2025 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Illinois
There are 277 radiation oncology physician records in Illinois.
All 277 in Illinois → Every provider in O Fallon → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Susan Laduzinsky, MDShiloh, IL 622691942202155
- Jason Lee, MDShiloh, IL 622691851618995
- Ryan Mueller, MDO Fallon, IL 622691912571654
- Camille Williams, M.D.O Fallon, IL 622691649436510
- Robert Johnson, MDQuincy, IL 623011053308825
- Mark Khil, M.D.Quincy, IL 623011851398598
- Young Yu, M.D.Quincy, IL 623011679570865
- Casey Duncan, MDEffingham, IL 624011487720942
Common questions
What is Jacob Samuel Witt, M.D.'s NPI number?
Jacob Samuel Witt, M.D.'s National Provider Identifier (NPI) is 1891157871, issued on Mar 28, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Jacob Samuel Witt, M.D. located?
The NPPES record lists a practice address at 321 Regency Park Ste 100, O Fallon, IL, 62269. Phone: (618) 416-7970. Providers update this record themselves, so call before visiting.
How can I verify Jacob Samuel Witt, M.D.'s license?
NPPES lists Illinois license number 036150707, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jacob Samuel Witt, M.D. prescribe under Medicare Part D?
In 2024, Jacob Samuel Witt, M.D. had 372 Medicare Part D claims for 118 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
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.