Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Jack Weston Fitzsimons, MD

Individual provider Hematology & Oncology Physician · NPI 1558948273

Jack Weston Fitzsimons, MD is an Internal Medicine in Springfield, Illinois. Qualified in 2021, 5 years ago. Practices with Cep America-Illinois Hospitalists, LLP, a 196-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
5
Licensed in
IL
In the registry since
2021
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

315 W Carpenter St
Springfield, IL 62702-4901
Phone: (217) 545-8000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 036.170810 (IL)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X
Internal Medicine Physician Taxonomy 207R00000X · Licence 125.078448 (IL)

Record details

NPI number1558948273
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 27, 2021
Last updated in NPPESDecember 19, 2025
Certification dateDecember 19, 2025
Mailing address315 W Carpenter St, Springfield, IL 62702-4901

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2021 (5 years in practice)
Group practice Cep America-Illinois Hospitalists, Llp — 196 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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