Jack Weston Fitzsimons, MD
Hematology & Oncology Physician · Springfield, IL
Jack Weston Fitzsimons, MD is a hematology & oncology physician with a practice address in Springfield, Illinois, and NPI 1558948273, issued on Mar 27, 2021. Check the license (Illinois 036.170810, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Jack Weston Fitzsimons
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- 036.170810 IL
125.078448 IL
Self-reported in NPPES; status is on the state search - Practice location
- 315 W Carpenter St, Springfield, IL 62702
- Phone
- (217) 545-8000
- Enumerated
- Mar 27, 2021
- Record last updated
- Dec 19, 2025
- Medicare enrollment
- Enrolled (PECOS I20260407002918); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 666 in Illinois → Look up another NPI →
Also registered at 315 W Carpenter St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Edem Agamah, MDHematology & Oncology Physician1932147279
- Muaataz AzzawiGastroenterology Physician1124551577
- Theresa Boley, CFNPFamily Nurse Practitioner1184605743
- Traves Crabtree, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1790703429
- Jessica Dour, FNP-CFamily Nurse Practitioner1639561285
- Patricia Fank, M.D.Clinical Psychologist1629499769
Verify Jack Weston Fitzsimons 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 036.170810Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
87 Medicare Part D claims for 25 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D.
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: $188.99
2 payments; by number, the most common kind was education; the largest payer was Astellas Pharma US Inc. The 8,560 providers of this specialty with any payment received $7,481.41 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
- Cep America-Illinois Hospitalists, LLPSpringfield, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jack Weston Fitzsimons among 666 hematology & oncology physician records in Illinois
Jack Weston Fitzsimons, MD is one of 666 hematology & oncology physician records with a practice address in Illinois. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 94% of them.
- NPI issued2021 · 94% of these records are older, 4% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2021 · median 2003 among the 461 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 207RH0003X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Illinois
There are 666 hematology & oncology physician records in Illinois.
All 666 in Illinois → Every provider in Springfield → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Edem Agamah, MDSpringfield, IL 627021932147279
- Mary Bretscher, M.D.Springfield, IL 627021073623336
- Meghna Desai, MDSpringfield, IL 627021609865294
- Praveen Garg, M.D.Springfield, IL 627021760414437
- Leonard Giannone, MDSpringfield, IL 627021245297571
- Timothy Gillison, MDSpringfield, IL 627021710905906
- Aziz Khan, M.D.Springfield, IL 627021699702316
- Victor Lanzotti, MDSpringfield, IL 627021750349270
Common questions
What is Jack Weston Fitzsimons, MD's NPI number?
Jack Weston Fitzsimons, MD's National Provider Identifier (NPI) is 1558948273, issued on Mar 27, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Jack Weston Fitzsimons, MD located?
The NPPES record lists a practice address at 315 W Carpenter St, Springfield, IL, 62702. Phone: (217) 545-8000. Providers update this record themselves, so call before visiting.
How can I verify Jack Weston Fitzsimons, MD's license?
NPPES lists Illinois license number 036.170810, 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 Jack Weston Fitzsimons, MD prescribe under Medicare Part D?
In 2024, Jack Weston Fitzsimons, MD had 87 Medicare Part D claims for 25 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.